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• Intercept UITableView scroll touches

  - by Jonesy

  Is it possible to control when the UITableView scrolls in my own code. I am trying to get behaviour where a vertical swipe scrolls and a horizontal swipe gets passed through to my code (of which there are many example) BUT I want a DIAGONAL swipe to do nothing, i.e the UITableView should not even begin scrolling. I tried catching it in here - (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView but the scrollView.contentOffset.x is always 0 so I cannot detect a horizontal movement. I also tried subclassing UITableView and implementing - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event - (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event etc.. but the UITableView (and I guess it's parent UIScrollView) start to scroll before the touches are notified? To re-iterate, I want the UITableView scrolling to be locked if a diagonal swipe is made, but to scroll vertically normally. (This behaviour can be seen in Tweetie(Twitter) for the iPhone) Thanks for any help!

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• How to enlarge dynamically an UILabel (label and font size)?

  - by Flocked

  Hello, Im currently working on an iPhone project. I want to enlarge dynamically an UILabel in Objective-C like this: How is this possible? I thought I have to do it with CoreAnimation, but I didn't worked. Here is the code I tried: UILabel * fooL = //[…] fooL.frame = CGRectMake(fooL.frame.origin.x, fooL.frame.origin.y, fooL.frame.size.width, fooL.frame.size.height); fooL.font = [UIFont fontWithName:@"Helvetica" size:80]; [UIView beginAnimations:nil context:nil]; [UIView setAnimationCurve:UIViewAnimationCurveEaseIn]; [UIView setAnimationDelegate:self]; [UIView setAnimationDuration:0.5]; [UIView setAnimationBeginsFromCurrentState:YES]; fooL.font = [UIFont fontWithName:@"Helvetica" size:144]; //bigger size fooL.frame = CGRectMake(20 , 44, 728, 167); //bigger frame [UIView commitAnimations]; The problem with this code is that it doesn't change the fontsize dynamically.

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• how to solve run time error 'Failed to create writable database file with message 'The operation couldn’t be completed. (Cocoa error 260.)'.'?

  - by user1432045

  I am beginner of iPhone I have created database but that give run time error of Failed to create writable database file with message 'The operation couldn’t be completed my code is -(void)createdatabase { NSFileManager *fileManager=[NSFileManager defaultManager]; NSError *error; NSString *dbPath=[self getDBPath]; BOOL success=[fileManager fileExistsAtPath:dbPath]; if(!success) { NSString *defaultDBPath=[[[NSBundle mainBundle]resourcePath] stringByAppendingPathComponent:@"SQL.sqlite"]; success=[fileManager copyItemAtPath:defaultDBPath toPath:dbPath error:&error]; if(!success) { NSAssert1(0, @"Failed to create writable database file with message '%@'.", [error localizedDescription]); } } } give any suggestion and source code which is apply in my code

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• Facebook friends.getLists failing

  - by Shaun Budhram

  Hi all, I'm trying a simple request on Facebook to return all my friend lists. I'm trying this in Facebook's test console, as well as through an iPhone app i'm working on. friends.getLists (also alternatively through FQL) SELECT flid, name FROM friendlist WHERE owner=4810796 I am currently logged in, so using that number should be valid. Both are returning an empty list (not erroring out), but I am certain that I have a few friend lists set up. I've also tried using this with a test account I set up, but got the same results. I could have sworn this command was working earlier. Can anyone please either verify or reject that this is happening for them? Thanks.

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• What way to use the CGContext to draw is suitable?

  - by Tattat

  I know that the CGContext cannot call it to draw directly, and it needs to fill the drawing logic in the drawInContext, and call the CGContext to draw using "setNeedsDisplay", so, I designed a cmd to execute, but it cause some problems... like this : http://stackoverflow.com/questions/2617827/why-i-cant-draw-in-a-loop-using-uiview-in-iphone I think the CGContext is very different from my previous programming experience....(I used HTML5 canvas, that allow me add more details, after I draw, so do the Java Swing) Actually, I want to know what is the suitable to implement these kind of thing in Apples' programmer mind. Thz.

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• Objective C message dispatch mechanism

  - by Dolphin

  I am just staring to play around with Objective C (writing toy iPhone apps) and I am curious about the underlying mechanism used to dispatch messages. I have a good understanding of how virtual functions in C++ are generally implemented and what the costs are relative to a static or non-virtual method call, but I don't have any background with Obj-C to know how messages are sent. Browsing around I found this loose benchmark and it mentions IMP cached messages being faster than virtual function calls, which are in turn faster than a standard message send. I am not trying to optimize anything, just get deeper understanding of how exactly the messages get dispatched. How are Obj-C messages dispatched? How do Instance Method Pointers get cached and can you (in general) tell by reading the code if a message will get cached? Are class methods essentially the same as a C function (or static class method in C++), or is there something more to them? I know some of these questions may be 'implementation dependent' but there is only one implementation that really counts.

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• Creating a multi-page PDF doc

  - by codemercenary

  Hi, has anyone already created a PDF document in an iPad app. i see that there are new functions in the UIKit to do this, but I can't find any code example for this. BOOL UIGraphicsBeginPDFContextToFile ( NSString *path, CGRect bounds, NSDictionary *documentInfo ); void UIGraphicsBeginPDFPage ( void ); I found an example that is supposed to work on the iPhone, but this gives me errors: Fri Apr 30 11:55:32 wks104.hs.local PDF[1963] <Error>: CGFont/Freetype: The function `create_subset' is currently unimplemented. Fri Apr 30 11:55:32 wks104.hs.local PDF[1963] <Error>: invalid Type1 font: unable to stream font. Fri Apr 30 11:55:32 wks104.hs.local PDF[1963] <Error>: FT_Load_Glyph failed: error 6. Fri Apr 30 11:55:32 wks104.hs.local PDF[1963] <Error>: FT_Load_Glyph failed: error 6. Fri Apr 30 11:55:32 wks104.hs.local PDF[1963] <Error>: FT_Load_Glyph failed: error 6. Fri Apr 30 11:55:32 wks104.hs.local PDF[1963] <Error>: FT_Load_Glyph failed: error 6.

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• Static compilation in the .NET world

  - by AngryHacker

  I'll be writing a small desktop app for a client that has WinXP machines and they won't be installing the .NET framework (at least not for me). So my choices are limited to either C++ or VB6, neither of which sound great. I remember reading back in the day that Mono came up with a static compiler, but recently the only thing I could find is Miguel de Icaza's entry on static compilation for a game engine for the purposes of running the app on the iPhone - not what I had in mind. Are there any products out there, free or commercial that will allow me to statically compile my .net 3.5 winform app? Thanks

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• Thread and two dimensional array in objective C?

  - by mactonny

  Hey, guys, I am just starting to wrap my head around objective C and I am doing a little project on Iphone. And I just encountered a weird problem. I had to deal with images in my program so I have a lot local variables declared like temp[width][height]. If I am not using NSThread to perform image processing, it works all fine. However, if I use NSThread, it'll keep giving me EXC_BAD_ACCESS on whenever I try to access a 2-D array declared like temp[widht][height]. So I have to allocate memory from heap in order to have a 2-D array. That'll solve the problem but I still don't get it. My first thought would be stack over flow, but it worked all fine with one thread. I just don't get it.

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• Is anyone else receiving a QUOTA_EXCEEDED_ERR on their iPad when accessing localStorage?

  - by Kevin

  I have a web application written in JavaScript that runs successfully on the desktop via Safari as well as on the iPhone. We are looking at porting this application to the iPad and we are running into a problem where we are seeing QUOTA_EXCEEDED_ERR when storing a relatively small amount of data within the localStorage on the device. I know what this error means, but I just don't think I'm storing all that much data. Is anyone else doing something similar? And seeing/not seeing this problem? Kevin...

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• Transfer iPod files to Computer/iTunes/iPod [closed]

  - by lucarn23

  Hi, for all iPod fans, I want to share you a smart tool called iPod Transfer. It can help: (1)Transfer iPod music, video, photo, podcast, tv shows to your iTunes or Local Computer. (2)Transfer iPod files to another iPod/iPhone. (3)Transfer local files from computer to your iPod without iTunes. (4)Manage your iPod as hard disk instead of just syncing it with your iTunes. Free download it here to try it and it is easy to use. http://www.macdvdrippersoft.com/ipod-transfer-avcware.html

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• avaudioplayer interferes with mpmovieplayer on ipad

  - by user175826

  my app plays video and audio. however, i have a problem where once i play an audio file using avaudioplayer, the video refuses to play. when i play the video first, everything is fine. but if the audio is played first, any time i try to play the video it simply pops up the video player but will not play the actual video (you can use the scroller to go to any point in the video, but no playback will happen). this issue does not come up on the iphone, nor on the ipad simulator. clearly there is some resource conflict here, probably related to the audio, and i'd welcome some input on how to address it.

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• Which Android phone to use for development...?

  - by Nikos

  Hi, I'm planning to port a couple of games from iPhone/Windows Mobile to the Android platform. The games are written in C++ so I plan to use the NDK with a thin java wrapper. I'm new to the Android platform and need some advice on which phone to buy for development. I suspect like Windows Mobile there is a level of fragmentation with different phones supporting different features (keyboard/ rotation/ screen size/ capacitive touch screen/ etc). What are the best device(s) for development on the Android platform...? They also have to be available in the UK/Europe. Thank you in advance. Nikos.

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• iPad application - Using Dock within an application

  - by sagar

  Hello ! Every one. I am interested in development of iPad applications. I have seen iPad Demo from Apple site. There is one new functionality - which is dock in iPad. My Question is "Can we use our own Dock control ( as we have - Tab bar in iPhone ) in iPad application? " If Answer is yes - Then my other question is How? Thanks in advance for sharing your knowledge. Sagar

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• Ruby/Rails Audio Conversion Plugins?

  - by coneybeare

  I am looking for a good gem/plugin to convert user-uploaded audio files to different formats. One format in particular that I am interested in is converting to Apple .caf with ima4 compression for inclusion in an iPhone app. I have been using afconvert on my mac for this so far, but I need to do it on my linux box, server-side. Ideally, I would be able to work into paperclip. As an additional solution, ffmpeg could work, but I have not seen any .caf options for it. Anybody know of one?

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• iOS6 Twitter integration

  - by Peter Warbo

  There seems to be a difference between the iPhone simulator and actual device when checking if Twitter is available. I check if a Twitter account is setup by using this code: [SLComposeViewController isAvailableForServiceType:SLServiceTypeTwitter]; In the simulator there is a nice UIAlertView informing the user that there are no Twitter accounts setup and two buttons one for Settings and one for Cancel. However when I run my app on my device it will not show the above UIAlertView. Why is that? And how can I catch what button is tapped in the above UIAlertView (since I did not instantiate it?) This is what it looks like on the simulator:

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• Good websites and/or books to learn game algorithms?

  - by Moshe

  I'm interested in learning video game algorithms. (For iPhone particularly, but generally as well. I assume certain concepts are the same.) I am best off (personally) learning from a book but websites are useful too. What has helped you learn game programming algorithms and concepts? EDIT: As per request, I'll clarify the types of algorithms... I was looking for any algorithms really, but I guess I was interested in (top-down view) platformer algorithms, but, now that you mention it, Seth, I do wonder about chess...

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• UITabBarController unresponsive for touches

  - by JustSid

  So, I have this view hierarchy in my app: UIWindow UIViewController UITabBarController -> 4 UINavigationController I know that a UITabBarController is designed to be the topmost view in an app, however this isn't possible in my case. However, the problem that I have is that ~20 of the lower pixels aren't responsive for touches so that the UITabBarController doesn't trigger the tab changes correctly. This happens on an actual device (iPad and iPhone 3G). My question is, are there any obvious reasons why this could happen? I add the UITabBarController like this as subview to my UIViewController view: - (void)viewDidLoad { [super viewDidLoad]; [self.view addSubview:controller.view]; // Controller is the UITabBarController } I didn't set the UITabBarController's delegate.

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• Type attribute for text_field

  - by Koning Baard XIV

  I have this code: <%= f.text_field :email, :type => "email", :placeholder => "[email protected]" %> So people can enter their email on an iPhone with the email keyboard instead of the ASCII keyboard. However, the output is: <input id="user_email" name="user[email]" placeholder="[email protected]" size="30" type="text" /> which should be: <input id="user_email" name="user[email]" placeholder="[email protected]" size="30" type="email" /> Is there a way to force Rails to use the email type instead of text, or must I use HTML directly? Thanks

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• use multiple views in an application

  - by Gaurav Arora

  Hi All, I am new to Iphone programming. So please don't mind if I ask some basic questions. :mad: I want to develop an application where the landing screen will be a login screen and after login application should display a new screen with the list of available categories. And on selecting any category a new screen should appear with the information related to the selected category. Basically I want to display different screens in the applications and my confusion is how can I make different screens with one .xib file? or should I use different .xib files for each screen. If I use different .xib files for each screen then how should I navigate to different screens. Please help in solving this confusion. Thanks in advance Gaurav

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• Touch area changing on custom UIButton with image and title on landscape mode

  - by gkedmi

  hello all I'm trying to build a button that looks like the icons on the iphone , with an image and a title bellow.I'm working in landscape mode. I have a custom button on the IB with image and title and inside the code I use the methods : [aButton setTitleEdgeInsets:UIEdgeInsetsMake(60.0, -50.0, 0.0, 0.0)]; [aButton setImageEdgeInsets:UIEdgeInsetsMake(-10.0, 29.0, 0.0, 0.0)]; my problem is that the area that react to the touch events is very small and is on the top left of the button , another problem is that if I change my button size I have to calculate again manually the values for these 2 functions. Is there any easy way to do it?and if not how can I fix the touch area? thanks Gilad

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• Web App for smartphones in ASPX

  - by Ryan Knoll

  I have been looking around recently to try and find a good place to learn how to start making my website more smartphone friendly when it is visited by an iPhone, android, or blackberry. This is something like what Digg.com does when it is visited by a smartphone. I have found a few tutorials for PHP but none for ASPX, and all I have is windows servers. Could anyone point me in the right direction, and show me were to find a quick run through on how to do something like this? I am a bit lost. :(

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• removing invisible header from ipad tableview

  - by Cœur

  my UITableView has some kind of invisible header / inset on iPad and not on iPhone. I tried all the following to remove this unwanted header/inset, with no success: - (void)viewDidLoad { [super viewDidLoad]; self.tableview.sectionHeaderHeight = 0.f; self.tableview.sectionFooterHeight = 0.f; self.tableview.tableHeaderView = nil; self.tableview.tableFooterView = nil; self.tableview.contentInset = UIEdgeInsetsZero; } - (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section { return 0.f; } - (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section { return 0.f; } - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section { return @""; } - (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section { return [[[UIView alloc] initWithFrame:CGRectNull] autorelease]; } - (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section { return [[[UIView alloc] initWithFrame:CGRectNull] autorelease]; }

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• Does UIWebView support javascript-based double-click events?

  - by Eric

  As usual, I'm trying to do something the easiest way possible, in this case implement a double-tap handler on a UIWebView like so: <div id="foo" ondblclick="clickHandler(this);" ... > It works fine in Safari and Firefox, and I know the code containing clickHandler is loading on the iPhone thanks to a now-annoying alert stmt at the end of loading. If I change ondblclick to onclick it works on both the device and the simulator. From reading similar queries it would seem that I need to intercept the taps in ... and then run my JavaScript code with the stringByEvaluatingJavaScriptFromString method, but then how do I know the JS id of the target? I no like that, would rather write a pure HTML/DOM/JS solution. Or since my app is about 80% web content, should I be using phonegap instead?

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• how to get wanted nodes from Stanford Parser nlp

  - by vitaly

  Hello all! My mean problem is that I dont know how to extract nodes from GrammaticalStructure. I am using englishPCFG.ser in java netbeans. My target is o know the quality of the screen like: the screen of iphone 4 is great. I want to extract screen and great. how can i extract the NN (screen) and VP (great) the code that I wrote is: LexicalizedParser lp = new LexicalizedParser("C:\\englishPCFG.ser"); lp.setOptionFlags(new String[]{"-maxLength", "80", "-retainTmpSubcategories"}); String sent ="the screen is very good."; Tree parse = (Tree) lp.apply(Arrays.asList(sent)); parse.pennPrint(); System.out.println(); TreebankLanguagePack tlp = new PennTreebankLanguagePack(); GrammaticalStructureFactory gsf = tlp.grammaticalStructureFactory(); GrammaticalStructure gs = gsf.newGrammaticalStructure(parse); Collection tdl = gs.typedDependenciesCollapsed();

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