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  • MonoTouch App Crashes When Returning From MFMailComposeViewController

    - by Richard Khan
    My MonoTouch Version Info: Release ID: 20401003 Git revision: 2f1746af36f421d262dcd2b0542ce86b12158f02 Build date: 2010-12-23 23:13:38+0000 The MFMailComposeViewController is displayed and works correctly as a dialog using the following code: if (MFMailComposeViewController.CanSendMail) { MFMailComposeViewController mail; mail = new MFMailComposeViewController (); mail.SetSubject ("Subject Test"); mail.SetMessageBody ("Body Test", false); mail.Finished += HandleMailFinished; this.navigationController.PresentModalViewController (mail, true); } else { new UIAlertView ("Mail Failed", "Mail Failed", null, "OK", null).Show (); } However, once the user selects Cancel | Delete Draft or Cancel | Save Draft or Send, the App throws a run-time error like the following: Stacktrace: at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication.UIApplicationMain (int,string[],intptr,intptr) <0x00004 at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication.UIApplicationMain (int,string[],intptr,intptr) <0x00004 at MonoTouch.UIKit.UIApplication.Main (string[],string,string) [0x00038] in /Users/plasma/Source/iphone/monotouch/UIKit/UIApplication.cs:26 at MonoTouch.UIKit.UIApplication.Main (string[]) [0x00000] in /Users/plasma/Source/iphone/monotouch/UIKit/UIApplication.cs:31 at MailDialog.Application.Main (string[]) [0x00000] in /Users/rrkhan/Projects/Sandbox/MailDialog/Main.cs:15 at (wrapper runtime-invoke) .runtime_invoke_void_object (object,intptr,intptr,intptr) Native stacktrace: 0 MailDialog 0x000be66f mono_handle_native_sigsegv + 343 1 MailDialog 0x0000e43e mono_sigsegv_signal_handler + 313 2 libSystem.B.dylib 0x903e946b _sigtramp + 43 3 ??? 0xffffffff 0x0 + 4294967295 4 MessageUI 0x01a9f6b7 -[MFMailComposeController _close] + 284 5 UIKit 0x01f682f1 -[UIActionSheet(Private) _buttonClicked:] + 258 6 UIKit 0x01be1a6e -[UIApplication sendAction:to:from:forEvent:] + 119 7 UIKit 0x01c701b5 -[UIControl sendAction:to:forEvent:] + 67 8 UIKit 0x01c72647 -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 527 9 UIKit 0x01c711f4 -[UIControl touchesEnded:withEvent:] + 458 10 UIKit 0x01c060d1 -[UIWindow _sendTouchesForEvent:] + 567 11 UIKit 0x01be737a -[UIApplication sendEvent:] + 447 12 UIKit 0x01bec732 _UIApplicationHandleEvent + 7576 13 GraphicsServices 0x03eb7a36 PurpleEventCallback + 1550 14 CoreFoundation 0x00df9064 CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION + 52 15 CoreFoundation 0x00d596f7 __CFRunLoopDoSource1 + 215 16 CoreFoundation 0x00d56983 __CFRunLoopRun + 979 17 CoreFoundation 0x00d56240 CFRunLoopRunSpecific + 208 18 CoreFoundation 0x00d56161 CFRunLoopRunInMode + 97 19 GraphicsServices 0x03eb6268 GSEventRunModal + 217 20 GraphicsServices 0x03eb632d GSEventRun + 115 21 UIKit 0x01bf042e UIApplicationMain + 1160 22 ??? 0x0a1e4bd9 0x0 + 169757657 23 ??? 0x0a1e4b12 0x0 + 169757458 24 ??? 0x0a1e4515 0x0 + 169755925 25 ??? 0x0a1e4451 0x0 + 169755729 26 ??? 0x0a1e44ac 0x0 + 169755820 27 MailDialog 0x0000e202 mono_jit_runtime_invoke + 1360 28 MailDialog 0x001c92af mono_runtime_invoke + 137 29 MailDialog 0x001caf6b mono_runtime_exec_main + 714 30 MailDialog 0x001ca891 mono_runtime_run_main + 812 31 MailDialog 0x00094fe8 mono_jit_exec + 200 32 MailDialog 0x0027cf05 main + 3494 33 MailDialog 0x00002ca1 _start + 208 34 MailDialog 0x00002bd0 start + 40 Debug info from gdb: warning: Could not find object file "/var/folders/Ny/NyElTwhDGD8kZMqIEeLGXE+++TI/-Tmp-//cc6F1tBs.o" - no debug information available for "template.m". warning: .o file "/Developer/MonoTouch/SDKs/MonoTouch.iphonesimulator4.2.sdk/usr/lib/libmonotouch.a(zlib-helper.x86.42.o)" more recent than executable timestamp in "/Users/rrkhan/Library/Application Support/iPhone Simulator/4.2/Applications/52AF1D24-AADA-48ED-B373-ED08E89E4985/MailDialog.app/MailDialog" warning: Could not open OSO file /Developer/MonoTouch/SDKs/MonoTouch.iphonesimulator4.2.sdk/usr/lib/libmonotouch.a(zlib-helper.x86.42.o) to scan for pubtypes for objfile /Users/rrkhan/Library/Application Support/iPhone Simulator/4.2/Applications/52AF1D24-AADA-48ED-B373-ED08E89E4985/MailDialog.app/MailDialog warning: .o file "/Developer/MonoTouch/SDKs/MonoTouch.iphonesimulator4.2.sdk/usr/lib/libmonotouch.a(monotouch-glue.x86.42.o)" more recent than executable timestamp in "/Users/rrkhan/Library/Application Support/iPhone Simulator/4.2/Applications/52AF1D24-AADA-48ED-B373-ED08E89E4985/MailDialog.app/MailDialog" warning: Could not open OSO file /Developer/MonoTouch/SDKs/MonoTouch.iphonesimulator4.2.sdk/usr/lib/libmonotouch.a(monotouch-glue.x86.42.o) to scan for pubtypes for objfile /Users/rrkhan/Library/Application Support/iPhone Simulator/4.2/Applications/52AF1D24-AADA-48ED-B373-ED08E89E4985/MailDialog.app/MailDialog warning: .o file "/Developer/MonoTouch/SDKs/MonoTouch.iphonesimulator4.2.sdk/usr/lib/libmonotouch.a(gc.x86.42.o)" more recent than executable timestamp in "/Users/rrkhan/Library/Application Support/iPhone Simulator/4.2/Applications/52AF1D24-AADA-48ED-B373-ED08E89E4985/MailDialog.app/MailDialog" warning: Could not open OSO file /Developer/MonoTouch/SDKs/MonoTouch.iphonesimulator4.2.sdk/usr/lib/libmonotouch.a(gc.x86.42.o) to scan for pubtypes for objfile /Users/rrkhan/Library/Application Support/iPhone Simulator/4.2/Applications/52AF1D24-AADA-48ED-B373-ED08E89E4985/MailDialog.app/MailDialog Error connecting stdout and stderr (127.0.0.1:10001) warning: .o file "/Developer/MonoTouch/SDKs/MonoTouch.iphonesimulator4.2.sdk/usr/lib/libmonotouch.a(monotouch-glue.x86.42.o)" more recent than executable timestamp in "/Users/rrkhan/Library/Application Support/iPhone Simulator/4.2/Applications/52AF1D24-AADA-48ED-B373-ED08E89E4985/MailDialog.app/MailDialog" warning: Couldn't open object file '/Developer/MonoTouch/SDKs/MonoTouch.iphonesimulator4.2.sdk/usr/lib/libmonotouch.a(monotouch-glue.x86.42.o)' Attaching to process 9992. Reading symbols for shared libraries . done Reading symbols for shared libraries ....................................................................................................................... done 0x9038e459 in read$UNIX2003 () 8 0x903a8a12 in __workq_kernreturn () 7 "WebThread" 0x903830fa in mach_msg_trap () 6 0x903b10a6 in __semwait_signal () 5 0x90383136 in semaphore_wait_trap () 4 0x903830fa in mach_msg_trap () 3 0x903a8a12 in __workq_kernreturn () 2 "com.apple.libdispatch-manager" 0x903a9982 in kevent () * 1 "com.apple.main-thread" 0x9038e459 in read$UNIX2003 () Thread 8 (process 9992): 0 0x903a8a12 in __workq_kernreturn () 1 0x903a8fa8 in _pthread_wqthread () 2 0x903a8bc6 in start_wqthread () Thread 7 (process 9992): 0 0x903830fa in mach_msg_trap () 1 0x90383867 in mach_msg () 2 0x00df94a6 in __CFRunLoopServiceMachPort () 3 0x00d56874 in __CFRunLoopRun () 4 0x00d56240 in CFRunLoopRunSpecific () 5 0x00d56161 in CFRunLoopRunInMode () 6 0x04f7c423 in RunWebThread () 7 0x903b085d in _pthread_start () 8 0x903b06e2 in thread_start () Thread 6 (process 9992): 0 0x903b10a6 in __semwait_signal () 1 0x903dcee5 in nanosleep$UNIX2003 () 2 0x903dce23 in usleep$UNIX2003 () 3 0x0027714c in monotouch_pump_gc () 4 0x903b085d in _pthread_start () 5 0x903b06e2 in thread_start () Thread 5 (process 9992): 0 0x90383136 in semaphore_wait_trap () 1 0x0015ae1d in finalizer_thread (unused=0x0) at ../../../../mono/metadata/gc.c:1026 2 0x002034a3 in start_wrapper (data=0x7b16ba0) at ../../../../mono/metadata/threads.c:661 3 0x002448e2 in thread_start_routine (args=0x8037e34) at ../../../../mono/io-layer/wthreads.c:286 4 0x00274357 in GC_start_routine (arg=0x6ff7f60) at ../../../libgc/pthread_support.c:1390 5 0x903b085d in _pthread_start () 6 0x903b06e2 in thread_start () Thread 4 (process 9992): 0 0x903830fa in mach_msg_trap () 1 0x90383867 in mach_msg () 2 0x0011cc46 in mach_exception_thread (arg=0x0) at ../../../../mono/mini/mini-darwin.c:138 3 0x903b085d in _pthread_start () 4 0x903b06e2 in thread_start () Thread 3 (process 9992): 0 0x903a8a12 in __workq_kernreturn () 1 0x903a8fa8 in _pthread_wqthread () 2 0x903a8bc6 in start_wqthread () Thread 2 (process 9992): 0 0x903a9982 in kevent () 1 0x903aa09c in _dispatch_mgr_invoke () 2 0x903a9559 in _dispatch_queue_invoke () 3 0x903a92fe in _dispatch_worker_thread2 () 4 0x903a8d81 in _pthread_wqthread () 5 0x903a8bc6 in start_wqthread () Thread 1 (process 9992): 0 0x9038e459 in read$UNIX2003 () 1 0x000be81f in mono_handle_native_sigsegv (signal=11, ctx=0xbfffd238) at ../../../../mono/mini/mini-exceptions.c:1826 2 0x0000e43e in mono_sigsegv_signal_handler (_dummy=10, info=0xbfffd1f8, context=0xbfffd238) at ../../../../mono/mini/mini.c:4846 3 4 0x028d6a63 in objc_msgSend () 5 0x01ad469f in func.24012 () 6 0x01a9f6b7 in -[MFMailComposeController _close] () 7 0x01f682f1 in -[UIActionSheet(Private) _buttonClicked:] () 8 0x01be1a6e in -[UIApplication sendAction:to:from:forEvent:] () 9 0x01c701b5 in -[UIControl sendAction:to:forEvent:] () 10 0x01c72647 in -[UIControl(Internal) _sendActionsForEvents:withEvent:] () 11 0x01c711f4 in -[UIControl touchesEnded:withEvent:] () 12 0x01c060d1 in -[UIWindow _sendTouchesForEvent:] () 13 0x01be737a in -[UIApplication sendEvent:] () 14 0x01bec732 in _UIApplicationHandleEvent () 15 0x03eb7a36 in PurpleEventCallback () 16 0x00df9064 in CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION () 17 0x00d596f7 in __CFRunLoopDoSource1 () 18 0x00d56983 in __CFRunLoopRun () 19 0x00d56240 in CFRunLoopRunSpecific () 20 0x00d56161 in CFRunLoopRunInMode () 21 0x03eb6268 in GSEventRunModal () 22 0x03eb632d in GSEventRun () 23 0x01bf042e in UIApplicationMain () 24 0x0a1e4bd9 in ?? () 25 0x0a1e4b12 in ?? () 26 0x0a1e4515 in ?? () 27 0x0a1e4451 in ?? () 28 0x0a1e44ac in ?? () 29 0x0000e202 in mono_jit_runtime_invoke (method=0xa806e6c, obj=0x0, params=0xbfffedbc, exc=0x0) at ../../../../mono/mini/mini.c:4733 30 0x001c92af in mono_runtime_invoke (method=0xa806e6c, obj=0x0, params=0xbfffedbc, exc=0x0) at ../../../../mono/metadata/object.c:2615 31 0x001caf6b in mono_runtime_exec_main (method=0xa806e6c, args=0xa6a34e0, exc=0x0) at ../../../../mono/metadata/object.c:3581 32 0x001ca891 in mono_runtime_run_main (method=0xa806e6c, argc=0, argv=0xbfffeef4, exc=0x0) at ../../../../mono/metadata/object.c:3355 33 0x00094fe8 in mono_jit_exec (domain=0x6f8fe58, assembly=0xa200730, argc=1, argv=0xbfffeef0) at ../../../../mono/mini/driver.c:1094 34 0x0027cf05 in main () ================================================================= Got a SIGSEGV while executing native code. This usually indicates a fatal error in the mono runtime or one of the native libraries used by your application. Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication:UIApplicationMain (int,string[],intptr,intptr) at MonoTouch.UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x00038] in /Users/plasma/Source/iphone/monotouch/UIKit/UIApplication.cs:26 at MonoTouch.UIKit.UIApplication.Main (System.String[] args) [0x00000] in /Users/plasma/Source/iphone/monotouch/UIKit/UIApplication.cs:31 at MailDialog.Application.Main (System.String[] args) [0x00000] in /Users/rrkhan/Projects/Sandbox/MailDialog/Main.cs:15 I have a very simple sample project illustrating the problem. I can sent you if required.

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  • MonoTouch.Dialog: Sub Section BackgroundView?

    - by BahaiResearch.com
    I have a RootElement with Sections. One section has RadioElements. How do I change the BackgroundView on the sub section? Something like this doesn't work because the sub view isn't yet created.: rootGroups = new RootElement ("Ideas", rdoGroup) { new RootElement ("Baha'i") { new Section (){ new RadioElement ("Peace"), new RadioElement ("Unity"), new RadioElement ("Science") } } }; ??? rootGroups.TableView.BackgroundColor = ...;

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  • monotouch 2d pixel with correct resolution

    - by acidzombie24
    I am writing up a game that is size sensitive. It needs to be pixel perfect. I believe the resolution is 480x320 pixels with the iphone being twice the width and height. My code is grid based with images exactly 16x16pixels. I found samples of opengl in the past but I never found any good tutorial that had 0,0 the top left and was the correct size in resolution (which made images look terrible) What can I use? I'd like to write the code in C# (or C++ but C# is preferred) and use monotouch. I don't know any libraries for 2d graphics. I'll figure out sound and such afterwards and I seen documentation on monotouch for input.

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  • Webinar Recording on Cross Platform Development with MonoTouch and Mono for Android

    - by Wallym
    The iPhone and Android are dominant in the marketplace. The two platforms currently have 85% of the smartphone marketplace and are continuing to grow that marketshare. Developers are being tasked with targeting these two platforms. In this session, we’ll take a high level look at how we can use c# and .NET knowledge to share code between iOS and and Android. We’ll look at linked files, using the Xamarin Mobile API, the challenges of running across platforms and frameworks, as well as other features of Visual Studio, Monotouch, MonoDevelop, and Mono for Android that allows us to write as much code that can run on both platforms.The following link is a recording on Cross Platform Development with MonoTouch and Mono for Android. I am guessing that the link only works in IE. That's out of my control.

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  • Why cannot change Monotouch.Dialog.TableView.Background color

    - by BlueSky
    Why cannot change MonoTouch.Dialog.TableView.Background color ? I am using the Elements API of MonoTouch.Dialog. It's still gray! class MyDialogViewController : DialogViewController { public MyDialogViewController (RootElement root) : base (root) { } public override void LoadView () { base.LoadView (); TableView.BackgroundColor = UIColor.Clear; UIImage background = UIImage.FromFile ("Mybackground.png"); ParentViewController.View.BackgroundColor = UIColor.FromPatternImage (background); } } public partial class MyVC: UINavigationController { public void CreateTestUI() { var menu = new RootElement("MyMenu"){ new Section ("test"){ new StringElement("Test", delegate() { }), ... var dv = new MyDialogViewController (menu) { Autorotate = true }; // add the nav controller to the window this.PushViewController (dv, true); } }

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  • Videos of my MonoTouch and Mono and Mobile sessions from NDC 2011

    - by Chris Hardy (ChrisNTR)
    Two weeks ago, I was in Oslo, Norway getting ready to present a few talks at the Norwegian Developer's Conference 2011 and now two weeks later, it's about time I point you to my MonoTouch and Mono and Mobile talks from the conference! First I would like to thanks for everyone involved with the conference, the hosts, the staff, the speakers and the attendees. There was so many great talks going on that you're forced to download the videos afterwards! All the videos from the conference are up on the...(read more)

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  • Webinar on Cross Platform Development with MonoTouch for the iPhone and Mono for Android on Wednesday

    - by Wallym
    The iPhone and Android are dominant in the marketplace. The two platforms currently have 85% of the smartphone marketplace and are continuing to grow that marketshare. Developers are being tasked with targeting these two platforms. In this session, we’ll take a high level look at how we can use c# and .NET knowledge to share code between iOS and and Android. We’ll look at linked files, using the Xamarin Mobile API, the challenges of running across platforms and frameworks, as well as other features of Visual Studio, Monotouch, MonoDevelop, and Mono for Android that allows us to write as much code that can run on both platforms.Here is the registration link: https://www302.livemeeting.com/lrs/8001676474/Registration.aspx?pageName=2w197495hzh0t56g

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  • Cross-Platform Mobile Development With Mono for Android and MonoTouch

    - by Wallym
    Many years ago, in fact pre-Java, I remember a hallway discussion about the desire to write a single application that could easily run across various platforms. At the time, we were only worried about writing applications on Windows 3.1 and Mac OS 7.x. There were many discussions about windows, user interface concepts, and specifically a rather long discussion as to whether Mac users would accept a Mac application that didn't have balloon help. Thankfully, the marketplace answered this question for us with the Windows API winning the battle.A similar set of questions is currently going on in the mobile world. Unfortunately, at this point in time, there is currently no winning API and none currently in sight. What's a developer to do? Here are some questions that developers have (and there are many more):How can mobile developers target Android and the iPhone with the same code?How can .NET developers share their code across Android, iPhone and other platforms?How can developers give applications the look and feel of the specific platform and still allow as much code as possible to be shared?Mobile devices share many common features, such as cameras, accelerometers, and address books. How can we take advantage of them in a platform independent way and still give the users the look of every other application running on their platform?In this article, we'll look at some solutions to these cross-platform and code-sharing questions between Mono for Android, MonoTouch and the .NET Framework available to developers. 

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  • Mobile: Wrox Cross Platform Mobile Development - iPhone, iPad, Android, and everything with .NET & C#

    - by Wallym
    Wrox has produced a bundle of their 3 best selling mobile development books and it is available as of Today (March 16). A bundle of 3 best-selling and respected mobile development e-books from Wrox form a complete library on the key tools and techniques for developing apps across the hottest platforms including Android and iOS. This collection includes the full content of these three books, at a special price: Professional Android Programming with Mono for Android and .NET/C#, ISBN: 9781118026434, by Wallace B. McClure, Nathan Blevins, John J. Croft, IV, Jonathan Dick, and Chris Hardy Professional iPhone Programming with MonoTouch and .NET/C#, ISBN: 9780470637821, by Wallace B. McClure, Rory Blyth, Craig Dunn, Chris Hardy, and Martin Bowling Professional Cross-Platform Mobile Development in C#, ISBN: 9781118157701, by Scott Olson, John Hunter, Ben Horgen, and Kenny Goers Remember, go buy 8-10 copies of the 3 book set for the ones you love. They will make great and romantic gifts!!

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  • How did I get here? My route to Android, iPhone, Windows Phone 7, and interest in Mobile Devices

    - by Wallym
    I get asked all the time how/why I got interested in mobile and jumped on this fairly early.  I tend to give half answers because it wasn't just one thing that took me to mobile, but a whole host of separate ivents culminating in a specific event where I wasdoing market research in May/June 2008.  Let me throw out the events and the facts about me: I tend to like new, different, cool stuff.  I jumped on .NET early on.  I jumped on Ajax early on.  I don't jump on every new technology that comes down the road, I'm probably the only person on the planet that doesn't "get" MVC, though I acknowledge that a lot of people do and it solves a number of problems in the default settings of ASP.NET WebForms. I remember buying an early Windows CE device. It was interesting, but dang, this stylus thing sucks. After I lost my third stylus, i just gave up.  I got my first mobile phone in early 1999.  Reception was crappy, but I could see the value in being mobile. In 1999, I worked on a manufacturing systems project.  One piece of the projects was a set of handheld devices on the shop floor.  While the UI was a crappy DOS based, yes I said DOS as in Disk Operating System Version 6.22, I could see that the wireless world was a direction I wanted to be in. In 2000, Microsoft released the first public alpha of .NET.  Very cool stuff indeed.  One piece of the puzzle was a set of mobile controls for ASP.NET.  I build numerous test apps as well as mobile version using these mobile controls.  Now, the mobile UIs of the time were based on WML, which was crap. I could real all the analysis of mobile and read all about growth rates.  Now, you have to realize that growth rates can be impressive when dealing with small numbers, but I knew it was a comer. In our first book, I got talked out of mobile because of the line from the publisher "Wally, mobile doesn't sell." Blackberry was the dominant device of the mid 2000s.  Its users were referred to as "Crackberry addicts."  Unfortunately, the mobile development experience for native apps was crap and the web experience was fairly rough as well, but if they could get the ecosystem started, other phones and better blackberryies would come out.  I finally jumped into using a blackberry. Sometime around 2006, I heard "Wally, mobile doesn't sell" again.  Now, anyone that knows me knows that someone saying something like this to me means I'll keep trying it. The phones of the mid 2000s were moving to be more graphical, but there were too many that had this idea that they had to use a stylus.  Stylus suck.  They get lost too easily. I worked on a project in 2007 and 2008 for a startup trying to answer the question of "What is there to do where I am at?"  For some reason, they wanted to be tied to PCs.  As it became obvious that they were having problems, their investor asked us to do some market research and to figure out what the marketplace did want.  One of the important things that I figured out was the we lived in a mobile world and if you had a mobile app, it need to be on a mobile device, not tied to a desktop/laptop/netbook device.  If there was any single event, this was it - I was doing some market research and sat and talked to people in a bar/restaurant in Atlanta called "The Grove" on Lavista.  The consensus of the people that I talked to was that they wanted their data where ever they were at, laptop, pc, mobile, whereever. In 2007, Apple released the iPhone.  Wow, what an impressive device, even with all the problems of a 1st generation device.  I bought an iPod Touch 1st generation to understand touch better, one of the best decisions I ever made. I decided in late 2008, to make a move into cloud, for a number of reasons.  I was working on an example app.  In April, 2009, one of my friends at Microsoft said "don't mention my name with this, but you need an iPhone front end for this app."  How do you get on the iPhone.  Well, there are a number of ways including: ObjectiveC.  Its hard to teach an old dog new tricks, and this dog knows .NET, not ObjectiveC. HTML, web, javascript optimized interface.  yeah, this is possible. PhoneGap.  Now, this is interesting, take an html interface and get it to run on the iPhone, Android, Blackberry, and other platforms.  I thought that this way made the most sense for me until......... MonoTouch.  In May/June 2009, Novell announced a way for .NET/c# developers to write apps for the iPhone.  This is the way that made the most sense to me. Titanium by Appcelerator.  This is similar in concept to PhoneGap.  I haven't played with this much but do want to learn more about it. In July, 2009, I emailed one of my contacts at Wrox to see if they would be interested in a short MonoTouch ebook in their Wrox Blox format.  I fully expected another  response along the lines of "Wally, mobile doesn't sell."  The response I got was "Wally, iPhone is H O T, get started immediately, can you have this to me before Labor Day."  Not quite the response I expected.  Thankfully, we didn't make the Labor Day, first draft date. I kept pushing back because I had a feeling that things were not going to be quite as polished and feature rich as necessary.  After all, Novell doesn't have the resouces of Microsoft's developer division. The ebook shipped on November 30, 2009. On about December, 15, 2009, my editor emailed and said "Your ebook is selling really well, lets do a full book and it by March 1 so get started."  Thankfully, guys like Craig Dunn and Chris Hardy were interested along with Martin and Ror joinged us later on. I bought my wife an iPhone 3Gs in early 2010 to go along with all my iPod Touch devices. I tried to pretend in 2010 that I wasn't that interested in mobile and still had interest in the desktop technologies.  I love the technologies and continue to use them today, but that isn't where my interest is right now.  I'm just about all mobile all the time with my energies.  Our book shipped in the beginning of July, 2010 right in the middle of the Apple FUD.I've been looking at Mobile Web as a way around the AppStores and Apple FUD problems of 2010. With all the Apple self FUD, we became interested in Android.I went up to Dino Esposito at DevConnections in Las Vegas at introduced myself. I've always tried to keep up with what Dino has been doing. I was shocked, he wanted to meet me.  We must have talked for 1.5 hours. It was way more time than I deserved. If you get a chance, go and introduce yourself to Dino. He's a great guy. Microsoft released Windows Phone 7 in the Fall of 2010.  I'm not doing development on that platform at this time.  I think they have a very interesting user interface.  The devices are being positively reviewed.  For my purposes, the devices are limited at this point in time.  We'll see what 2011 brings as far as updates to the operating system.  I need multitasking/background processing and html5 in the browser. Add that as well as acceptance in the marketplace and I'll be more interested in the device. Obviosuly, I'm now working on a MonoDroid book . I own Android and iPhone/iOS devices.  I am currently working on some startup ideas and am exploring as much in that area as I can. For 2011, I'm planning on speaking at Android Developer's Conference (AnDevCon) and Mobile Connections.  I'm really excited about this. I have a couple of magazine articles coming out in 2011 on Android and iPhone development with the Mono technologies.is Mono "The Answer"? What's "The Question?" I think it will work for me.  It might work for you, it might not.  it depends on your situation.  Its the current horse that I am riding. I might find a better horse tomorrow. So, that's how I got here.  I'm in love with mobile.  Mobile native apps on the device as well as mobile web.  I'm into all this cool stuff.  Where are you at?

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  • Develop an iPad app with MonoTouch, C#, and .NET.

    - by Wallym
    Article url: http://www.devproconnections.com/article/mobile-development/ipad-ios-app-monotouch-143636 Since its release in March 2010, the iPad has taken the world by storm. Each new iPad release has launched the device further and further into our lives. Here are some interesting facts that we have seen over the past few years along with some market share analysis:The school that my teenagers attend here in Knoxville, Tennessee, was the first school in the United States to integrate the iPad into its teaching program and its curriculum. Many schools have since followed suit.There are a healthy number of applications in a variety of market segments. In fact, there is a market for iPad point-of-sale systems.The iPad is a popular device and growing more so each day. comScore states that one in four smartphone owners also owns a tablet. We also know that the iPad comprises 68 percent of the tablet market.eMarketer recently issued a report stating that the number of iPad users is expected to grow by 90 percent in the US in 2012.No matter how you slice the data, tablet usage is growing, and the iPad is currently leading the pack. The question for .NET developers is "How can I get me some of that?" Xamarin's MonoTouch offers help, by providing the means for .NET developers to leverage their C# and .NET coding skills to develop iPad applications. MonoTouch has supported the iPad since the initial release of the iOS 3.2 beta SDK all the way up to the most recent iOS SDK, which supports the iPad. In this article, we'll look at targeting the iPad and how we can take advantage of iPad-specific features in our iOS applications written with MonoTouch.I hope you enjoy the article and you find it helpful.

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  • SIGABRT error when running MonoTouch application

    - by hambonious
    I'm new to MonoTouch and 9 times out of 10, when I try to run my MonoTouch app on the iPhone simulator (debug mode and regular), I receive a long error output that begins with the following message: Error connecting stdout and stderr (127.0.0.1:10001) Couldn't register com.yourcompany.[appnamehere] with the bootstrap server. Error: unknown error code. This generally means that another instance of this process was already running or is hung in the debugger.Stacktrace: at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication.UIApplicationMain (int,string[],intptr,intptr) <0x00004 at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication.UIApplicationMain (int,string[],intptr,intptr) <0x00004 at MonoTouch.UIKit.UIApplication.Main (string[],string,string) <0x00089 at MonoTouch.UIKit.UIApplication.Main (string[]) <0x00014 at PodcastManager.Application.Main (string[]) <0x00010 at (wrapper runtime-invoke) .runtime_invoke_void_object (object,intptr,intptr,intptr) <0x00043 And ends with: ================================================================= Got a SIGABRT while executing native code. This usually indicates a fatal error in the mono runtime or one of the native libraries used by your application. ================================================================= The weird thing is it will work some of the time. Once, a reboot of my machine did it. Others, just restarting MonoDevelop and/or the simulator. I can provide the entire error output if you think that may help. Any ideas?

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  • Application running in the iPad Simulator

    - by Wallym
    I've got some code running in the iPad Simulator.  One thing I discovered is that an application has to be compiled against a specific version of the SDK.  When I created a new iPad application, the updated iPad window for the Interface Builder became availble.  Very nice indeed.  Everything was the same as before, so that was good.  I fired up the iPad Simulator, and I got this below:   The next step was getting my app on there, which was easy.  Then I got my app running on the simulator, and I saw this: Basically, everything is filled with goodness and seems to be running correctly.  **fingers crossed**

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  • Installing MonoTouch - ibtool not found error

    - by Nic Wise
    I've had Xcode (3.2.1 - SnowLeopard, iphone 3.1.3) installed for a while, and I can run and build apps on it fine. I installed MonoTouch, as I want to leverage the 8+ years of .NET skills I have :) So I installed: Mono: MonoFramework-2.6.1_1.macos10.novell.x86 MonoTouch: monotouch-eval-1.5.0 MonoDevelop: MonoDevelop-2.2.1-r152508 (was 2.2.1, but when I started it up, it said there was an update, which I installed - thats the update version) If I make a new project and build it, I get any of the following errors: Build failed. Object reference not set to the instance of an object. Build failed: ibtool not found (btw, it's in /Developer/usr/bin/ibtool) or a similar one to the second one if I use the older (2.2.1 released) version of MonoTouch. I can't find any debug info anywhere. I could reinstall XCode/iPhone SDK, but as it already is installed and works (and no, this isn't a SL upgrade), it doesn't make sense. Anyone got any ideas? I SO want to use MonoTouch - Obj-C drives me up the wall! Console apps (mono ones) work fine. Mac OS X 10.6.2, Macbook Pro, clean install with old settings moved over.

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  • Using Monotouch with Google .NET APIs

    - by Bryan
    I am using Mike Bluestein's article, http://mikebluestein.wordpress.com/2009/09/27/using-monotouch-with-the-net-library-for-the-google-data-api/, to build an application that communicates with the google APIs. When I try to add references to my project, the imported projects say "incompatible target framework: v2.0". I can change version to 1.0, 3.0, or 3.5 with the same results. If I add the .dll to the monotouch project I get a compilation error - monotouch failed with no output 134. Any suggestions?

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  • Speaking at NDC 2010!

    - by Chris Hardy (ChrisNTR)
    Hello all, A few weeks ago it was announced that I will be speaking at the Norwegian Developers Conference 2010 on MonoTouch. I'll be doing two session, an introduction to MonoTouch and developing for iPhone, iPod Touch and the iPad as well as deep dive into MonoTouch and the ecosystem that is around MonoTouch and not just the MonoTouch product itself. The conference itself is (what looks to be) in the lovely surrounding of Olso so I'm excited both to visit the country, attend the conference and...(read more)

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  • Monotouch UITableView image "flashing" while background requests are fetched

    - by Themos Piperakis
    I am in need of some help from you guys. I have a Monotouch UITableView which contains some web images. I have implemented a Task to fetch them asynchronously so the UI is responsive, an even added some animations to fade them in when they are fetched from the web. My problems start when the user scrolls down very fast down the UITableView, so since the cells are resusable, several background tasks are queued for images. When he is at the bottom of the list, he might see the thumbnail displaying an image for another cell, then another, then another, then another, as the tasks are completed and each image replaces the other one. I am in need of some sort of checking whether the currently displayed cell corresponds to the correct image url, but not sure how to do that. Here is the code for my TableSource class. using System; using MonoTouch.UIKit; using MonoTouch.Foundation; using System.Collections.Generic; using System.Threading; using System.Threading.Tasks; using System.Diagnostics; { public class ListDelegate:UITableViewDelegate { private UINavigationController nav; public override float GetHeightForRow (UITableView tableView, NSIndexPath indexPath) { return 128; } public override void RowSelected (UITableView tableView, NSIndexPath indexPath) { DealViewController c = new DealViewController(((ListDataSource)tableView.DataSource).deals[indexPath.Row].Id,nav); nav.PushViewController(c,true); tableView.DeselectRow(indexPath,true); } public ListDelegate(UINavigationController nav) { this.nav = nav; } } public class ListDataSource:UITableViewDataSource { bool toggle=true; Dictionary<string,UIImage> images = new Dictionary<string, UIImage>(); public List<MyDeal> deals = new List<MyDeal>(); Dictionary<int,ListCellViewController> controllers = new Dictionary<int, ListCellViewController>(); public ListDataSource(List<MyDeal> deals) { this.deals = deals; } public override int RowsInSection (UITableView tableview, int section) { return deals.Count; } public override UITableViewCell GetCell (UITableView tableView, MonoTouch.Foundation.NSIndexPath indexPath) { UITableViewCell cell = tableView.DequeueReusableCell("cell"); ListCellViewController cellController = null; if (cell == null || !controllers.ContainsKey(cell.Tag)) { cellController = new ListCellViewController(); NSBundle.MainBundle.LoadNib("ListCellViewController", cellController, null); cell = cellController.Cell; cell.Tag = Environment.TickCount; controllers.Add(cell.Tag, cellController); } else { cellController = controllers[cell.Tag]; } if (toggle) { cell.BackgroundView = new UIImageView(UIImage.FromFile("images/bg1.jpg")); } else { cell.BackgroundView = new UIImageView(UIImage.FromFile("images/bg2.jpg")); } toggle = !toggle; MyDeal d = deals[indexPath.Row]; cellController.SetValues(d.Title,d.Price,d.Value,d.DiscountPercent); GetImage(cellController.Thumbnail,d.Thumbnail); return cell; } private void GetImage(UIImageView img, string url) { img.Alpha = 0; if (url != string.Empty) { if (images.ContainsKey(url)) { img.Image = images[url]; img.Alpha = 1; } else { var context = TaskScheduler.FromCurrentSynchronizationContext (); Task.Factory.StartNew (() => { NSData imageData = NSData.FromUrl(new NSUrl(url)); var uimg = UIImage.LoadFromData(imageData); images.Add(url,uimg); return uimg; }).ContinueWith (t => { InvokeOnMainThread(()=>{ img.Image = t.Result; RefreshImage(img); }); }, context); } } } private void RefreshImage(UIImageView img) { UIView.BeginAnimations("imageThumbnailTransitionIn"); UIView.SetAnimationDuration(0.5f); img.Alpha = 1.0f; UIView.CommitAnimations(); } } } Here is the ListCellViewController, that contains a custom cell using System; using System.Collections.Generic; using System.Linq; using MonoTouch.Foundation; using MonoTouch.UIKit; { public partial class ListCellViewController : UIViewController { #region Constructors // The IntPtr and initWithCoder constructors are required for items that need // to be able to be created from a xib rather than from managed code public ListCellViewController (IntPtr handle) : base(handle) { Initialize (); } [Export("initWithCoder:")] public ListCellViewController (NSCoder coder) : base(coder) { Initialize (); } public ListCellViewController () : base("ListCellViewController", null) { Initialize (); } void Initialize () { } public UIImageView Thumbnail { get{return thumbnailView;} } public UITableViewCell Cell { get {return cell;} } public void SetValues(string title,decimal price,decimal valuex,decimal discount,int purchases) { } #endregion } } All help is greatly appreciated

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  • MonoTouch & SQLite - Cannot open database after previous successful connections

    - by Tanis Draven
    I am having difficulty in reading data from my SQLite database from MonoTouch. I can read and write without any difficulty for the first few screens and then suddenly I am unable to create any further connections with the error: Mono.Data.Sqlite.SqliteException: Unable to open the database file at Mono.Data.Sqlite.SQLite3.Open (System.String strFilename, SQLiteOpenFlagsEnum flags, Int32 maxPoolSize, Boolean usePool) [0x0007e] in /Developer/MonoTouch/Source/mono/mcs/class/Mono.Data.Sqlite/Mono.Data.Sqlite_2.0/SQLite3.cs:136 at Mono.Data.Sqlite.SqliteConnection.Open () [0x002aa] in /Developer/MonoTouch/Source/mono/mcs/class/Mono.Data.Sqlite/Mono.Data.Sqlite_2.0/SQLiteConnection.cs:888 I ensure that i dispose and close every connection each time i use it but still i have this problem. For example: var mySqlConn = new SqliteConnection(GlobalVars.connectionString); mySqlConn.Open(); SqliteCommand mySqlCommand = new SqliteCommand(SQL, mySqlConn); mySqlCommand.ExecuteNonQuery(); mySqlConn.Close(); mySqlCommand.Dispose(); mySqlConn.Dispose(); I'm guessing that I'm not closing the connections correctly. Any help would be greatly appreciated.

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  • Monotouch - ICSharpCode.SharpZipLib giving an error

    - by Claudio
    Hy guys, I'm trying to generate a Zip File with ICSharpCode.SharpZipLib library but it's throwing a really weird error. Code: public static void ZipFiles(string inputFolderPath, string outputPathAndFile, string password) { ArrayList ar = GenerateFileList(inputFolderPath); // generate file list int TrimLength = (Directory.GetParent(inputFolderPath)).ToString().Length; TrimLength += 1; //remove '\' FileStream ostream; byte[] obuffer; ZipOutputStream oZipStream = new ZipOutputStream(File.Create(outputPathAndFile)); // create zip stream if (password != null && password != String.Empty) oZipStream.Password = password; oZipStream.SetLevel(9); // maximum compression ZipEntry oZipEntry; foreach (string Fil in ar) // for each file, generate a zipentry { oZipEntry = new ZipEntry(Fil.Remove(0, TrimLength)); oZipStream.PutNextEntry(oZipEntry); if (!Fil.EndsWith(@"/")) // if a file ends with '/' its a directory { ostream = File.OpenRead(Fil); obuffer = new byte[ostream.Length]; ostream.Read(obuffer, 0, obuffer.Length); oZipStream.Write(obuffer, 0, obuffer.Length); } } oZipStream.Finish(); oZipStream.Close(); } private static ArrayList GenerateFileList(string Dir) { ArrayList fils = new ArrayList(); bool Empty = true; foreach (string file in Directory.GetFiles(Dir,"*.xml")) // add each file in directory { fils.Add(file); Empty = false; } if (Empty) { if (Directory.GetDirectories(Dir).Length == 0) // if directory is completely empty, add it { fils.Add(Dir + @"/"); } } foreach (string dirs in Directory.GetDirectories(Dir)) // recursive { foreach (object obj in GenerateFileList(dirs)) { fils.Add(obj); } } return fils; // return file list } Error: Unhandled Exception: System.NotSupportedException: CodePage 437 not supported at System.Text.Encoding.GetEncoding (Int32 codepage) [0x00000] in <filename unknown>:0 at ICSharpCode.SharpZipLib.Zip.ZipConstants.ConvertToArray (System.String str) [0x00000] in <filename unknown>:0 at ICSharpCode.SharpZipLib.Zip.ZipConstants.ConvertToArray (Int32 flags, System.String str) [0x00000] in <filename unknown>:0 at ICSharpCode.SharpZipLib.Zip.ZipOutputStream.PutNextEntry (ICSharpCode.SharpZipLib.Zip.ZipEntry entry) [0x00000] in <filename unknown>:0 at WpfPrototype1.MainInvoicesView.ZipFiles (System.String inputFolderPath, System.String outputPathAndFile, System.String password) [0x00000] in <filename unknown>:0 at WpfPrototype1.MainInvoicesView.<ViewDidLoad>m__6 (System.Object , System.EventArgs ) [0x00000] in <filename unknown>:0 at MonoTouch.UIKit.UIControlEventProxy.Activated () [0x00000] in <filename unknown>:0 at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication:UIApplicationMain (int,string[],intptr,intptr) at MonoTouch.UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x00000] in <filename unknown>:0 at MonoTouch.UIKit.UIApplication.Main (System.String[] args) [0x00000] in <filename unknown>:0 at WpfPrototype1.Application.Main (System.String[] args) [0x00000] in <filename unknown>:0 How can I make this code support CodePage 437? Regards, Claudio

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  • handling NSStream events when using EASession in MonoTouch

    - by scotru
    Does anyone have an example of how to handle read and write NSStream events in Monotouch when working with accessories via EASession? It looks like there isn't a strongly typed delegate for this and I'm having trouble figuring out what selectors I need to handle on the delegates of my InputStream and OutputStream and what I actually need to do with each selector in order to properly fill and empty the buffers belonging to the EASession object. Basically, I'm trying to port Apple's EADemo app to Monotouch right now. Here's the Objective-C source that I think is relevant to this problem: / / asynchronous NSStream handleEvent method - (void)stream:(NSStream *)aStream handleEvent:(NSStreamEvent)eventCode { switch (eventCode) { case NSStreamEventNone: break; case NSStreamEventOpenCompleted: break; case NSStreamEventHasBytesAvailable: [self _readData]; break; case NSStreamEventHasSpaceAvailable: [self _writeData]; break; case NSStreamEventErrorOccurred: break; case NSStreamEventEndEncountered: break; default: break; } } / low level write method - write data to the accessory while there is space available and data to write - (void)_writeData { while (([[_session outputStream] hasSpaceAvailable]) && ([_writeData length] > 0)) { NSInteger bytesWritten = [[_session outputStream] write:[_writeData bytes] maxLength:[_writeData length]]; if (bytesWritten == -1) { NSLog(@"write error"); break; } else if (bytesWritten > 0) { [_writeData replaceBytesInRange:NSMakeRange(0, bytesWritten) withBytes:NULL length:0]; } } } // low level read method - read data while there is data and space available in the input buffer - (void)_readData { #define EAD_INPUT_BUFFER_SIZE 128 uint8_t buf[EAD_INPUT_BUFFER_SIZE]; while ([[_session inputStream] hasBytesAvailable]) { NSInteger bytesRead = [[_session inputStream] read:buf maxLength:EAD_INPUT_BUFFER_SIZE]; if (_readData == nil) { _readData = [[NSMutableData alloc] init]; } [_readData appendBytes:(void *)buf length:bytesRead]; //NSLog(@"read %d bytes from input stream", bytesRead); } [[NSNotificationCenter defaultCenter] postNotificationName:EADSessionDataReceivedNotification object:self userInfo:nil]; } I'd also appreciate any architectural recommendations on how to best implement this in monotouch. For example, in the Objective C implementation these functions are not contained in any class--but in Monotouch would it make sense to make them members of my

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  • MonoTouch Hello World for iPad

    - by Bryan
    I have tried following the sample Hello World for MonoTouch by creating an iPad solution. For some reason I cannot get the MainWindow to load. I followed the instructions exactly and the app just closes before even loading a view. Is there something missing? Do I need to tell the solution how to load the MainWindow.XIB or something? Please help, this seems very basic and I am about to throw MonoTouch in the garbage.

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  • Trying to Use LoadMoreElement in Monotouch.Dialog

    - by user1487581
    I am using Monotouch to write an Ipad app. The app uses tables to browse down through a directory tree and then select a file. I have used Monotouch.Dialog to browse the directories and I set up the directory tables as the app starts.However there are too many files to set up in a table as the app starts and so I want to set up the 'file table' as the file is selected from the lowest level directory table. I am trying to use LoadMoreElement to do this but I cannot make it work or find any examples online. I have coded the 'Elements API Walkthrough' in the Xamarin tutorial at:- http://docs.xamarin.com/ios/tutorials/MonoTouch.Dialog I then add a new section to the code:- _addButton.Clicked += (sender, e) => { ++n; var task = new Task{Name = "task " + n, DueDate = DateTime.Now}; var taskElement = new RootElement (task.Name){ new Section () { new EntryElement (task.Name, "Enter task description", task.Description) }, new Section () { new DateElement ("Due Date", task.DueDate) }, new Section() { new LoadMoreElement("Passive","Active", delegate {MyAction();}) } }; _rootElement [0].Add (taskElement); Where MyAction is:- public void MyAction() { Console.WriteLine ("we have been actioned"); } The problem is that MyAction is triggered and Console.Writeline writes the message but the table stays in the active state and never returns to passive. the documentation says:- Once your code in the NSAction is finished, the UIActivity indicator stops animating and the normal caption is displayed again. What am I missing? Ian

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