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  • Using a UITableViewController with a small-sized table?

    - by rpj
    When using a UITableViewController, the initWithStyle: method automatically creates the underlying UITableView with - according to the documentation - "the correct dimensions". My problem is that these "correct dimensions" seem 320x460 (the iPhone's screen size), but I'm pushing this TableView/Controller pair into a UINavigationController which is itself contained in a UIView, which itself is about half the height of the screen. No frame or bounds wrangling I can come up with seems to correctly reset the table's size, and as such it's "too long", meaning there are a collection of rows that are pushed off the bottom of the screen and are not visible nor reachable by scrolling. So my question comes down to: what is the proper way to tell a UITableViewController to resize its component UITableView to a specified rectangle? Thanks! Update I've tried all the techniques suggested here to no avail, but I did find one interesting thing: if I eschew the UINavigationController altogether (which I'm not yet willing to do for production, but as an experiment), and add the table view as a direct subview of the enclosing view I mentioned, the frame size given is respected. The very moment I re-introduce the UINavigationController into the mix, no matter if it is added as a subview before or after the table view, and no matter if alloc/init it before or after the table view is added as a subview, the result is the same as it was before. I'm beginning to suspect UINavigationController isn't much of a team player... Update 2 The suggestion to check frame size after the table view on screen was a good one: turns out that the navigation controller is in fact resizing it some time in between load and display. My solution, hacky at best, has been to cache the frame given on load and to reset it if changed at the beginning of tableView:cellForRowAtIndexPath:. Why there you ask? Because it's the one place I found that worked, that's why! I don't consider this a solution as it's obviously improper, but for the benefit of anyone else reading, it does seem to work.

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  • How can I store Google Maps search results in an array?

    - by Thomas
    Hi All, I'm working on an app where I need to query Google for businesses near a current location. How do I go about storing them in an array? I don't want to exit the app and open Google Maps, I want to be able to display the addresses in a list format (Table View, I suppose). Any help would be greatly appreciated. Thanks! Thomas

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  • NSOperation for animation loop causes strange scrolling behaviour

    - by Tricky
    Hi, I've created an animation loop which I run as an operation in order to keep the rest of my interface responsive. Whilst almost there, there is still one remaining issue. My UIScrollViews don't seem to be reliably picking up when a user touch ends. What this means is, for example, if a user drags down on a scroll view, when they lift their fingers the scrollview doesn't bounce back into place and the scrollbar remains visible. As if the finger hasn't left the screen. It takes another tap on the scrollview for it to snap to its correct position and the scrollbar to fade away... Here's the loop I created in a subclassed NSOperation: (void)main { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; NSRunLoop *runLoop = [NSRunLoop currentRunLoop]; _displayLink = [[CADisplayLink displayLinkWithTarget: self selector: @selector(animationLoop:)] retain]; [_displayLink setFrameInterval: 1.0f]; [_displayLink addToRunLoop:[NSRunLoop currentRunLoop] forMode: NSRunLoopCommonModes]; while (![self isCancelled]) { NSAutoreleasePool *loopPool = [[NSAutoreleasePool alloc] init]; [runLoop runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]]; [loopPool drain]; } [_displayLink invalidate]; [pool release]; } DOes anyone have any idea what might be going on here, and even better how to fix it... Thanks!

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  • Getting "Location" header from NSHTTPURLResponse

    - by aspcartman
    Can't get "Location" header from response at all. Wireshark says that i've got one: Location: http://*/index.html#0;sid=865a84f0212a3a35d8e9d5f68398e535 But NSHTTPURLResponse *hr = (NSHTTPURLResponse*)response; NSDictionary *dict = [hr allHeaderFields]; NSLog(@"HEADERS : %@",[dict description]); Produces this: HEADERS : { Connection = "keep-alive"; "Content-Encoding" = gzip; "Content-Type" = "text/html"; Date = "Thu, 25 Mar 2010 08:12:08 GMT"; "Last-Modified" = "Sat, 29 Nov 2008 15:50:54 GMT"; Server = "nginx/0.7.59"; "Transfer-Encoding" = Identity; } No location anywhere. How to get it? I need this "sid" thing.

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  • What happens with unarchived objects?

    - by Dane Man
    After I've unarchived an object with NSKeyedUnarchiver, I am able to use it like usual, but I am unable to re-archive it. When I try, it crashes. [NSKeyedArchiver archiveRootObject:unarchivedObject toFile:fileName]; I tried looking in the developer resources in apple but I haven't seen a thorough explination of proper usage of NSKeyedArchiver. Please Help.

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  • NSMutableArray EXC_BAD_EXCESS SIGBUS

    - by sujyanarayan
    Hi, I've the following code which causes crashes after sometime as i've set the below code in a timer:- CGImageRef cgImage = UIGetScreenImage(); [array addObject:(id)cgImage]; CGImageRelease(cgImage); Where initiallly i've declared "array" as: array = [[NSMutableArray alloc] init]; The timer goes well till 10 seconds as timer is of 1/10 seconds after 10 seconds it crashes. I think the application crashes because of EXC_BAD_EXCESS but dont know how to solve. Can Anybody help in solving the problem? Thanks in Adv.

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  • Two UITabBarControllers and Autorotation

    - by optimisticmonkey
    I have two UITabBarControllers in my mainwnidow.nib wired to my appdelegate. In my app delegate, I can load either one: - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { //either [window addSubview:tabBarController.view]; //or [window addSubview:tabBar2Controller.view]; [window makeKeyAndVisible]; } and autorotation works. If I add both (with the expectation to swap between them later): [window addSubview:tabBarController.view]; [window addSubview:tabBar2Controller.view]; then autorotation stops working...everything is always portrait. Thanks in advance for any tips...

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  • Duplicate a UITableViewCell - iPhone

    - by ncohen
    Hi everyone, I would like to create an effect to a cell of a UITableView. The effect is: duplicate the cell and move the duplicated cell (the original stays at its place). My problem is to duplicate the cell... I've tried: Code: UITableViewCell *animatedCell = [[UITableViewCell alloc] init]; animatedCell = [[self cellForRowAtIndexPath:indexPath] copy]; but UIView doesn't seem to implement the copy... How can I do it? Thanks

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  • iPhone switch statement using enum

    - by Boris
    I have defined an enum in a header file of a class : typedef enum{ RED = 0, BLUE, Green } Colors; - (void) switchTest:(Colors)testColor; and in the implementation file I have : - (void) switchTest:(Colors)testColor{ if(testColor == RED){ NSLog(@"Red selected"); } switch(testColor){ case RED: NSLog(@"Red selected again !"); break; default: NSLog(@"default selected"); break; } } My code compiles correctly without warrnings. When calling the switchTest method with RED, the output is : "Red selected" but once the first line of the switch runs, the application quits unexpectedly and without warrnings/errors. I don't mind using if/else syntax but I would like to understand my mistake.

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  • Display subclass data in XCode Expression window

    - by Nick VanderPyle
    I'm debugging an iPhone application I've written using XCode 3.2 and I cannot view the relevant public properties of an object I pull from Core Data. When I watch the object in the Expressions window it only displays the data from the base NSManagedObject. I'd like to see the properties that are on the subclass, not the superclass. If it helps, here's some of the code I'm using. Settings is a subclass of NSManagedObject. I created it using XCode's built-in modeler. Declared like: @interface Settings : NSManagedObject { } @property (nonatomic, retain) NSNumber * hasNews; @property (nonatomic, retain) NSString * logoUrl; @property (nonatomic, retain) NSNumber * hasPaymentGateway; @property (nonatomic, retain) NSString * customerCode; ... In the interface of my controller I have: Settings *settings; I populate settings with: settings = (Settings *)[NSEntityDescription insertNewObjectForEntityForName:@"Settings" inManagedObjectContext:UIAppManagedObjectContext()]; I then set the properties like: settings.hasNews = [NSNumber numberWithBool:TRUE]; I've tried casting settings as (Settings *) in the Expression window but that doesn't help. All I see are the properties to NSManagedObject. I'm using NSLog but would rather not.

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  • How to dynamically replace a method implementation in ObjC2?

    - by Abhi
    I am trying to learn how to write plugins using SIMBL. I got my plugin to load with the target application, and also know the method that I wish to override. However, I am not able to use class_getInstanceMethod correctly based on snippets on the Internet. Have things changed in OSX 10.6 and/or ObjC2? The following code from culater.net gives "Dereferencing pointer to incomplete type" on the second-last statement: BOOL DTRenameSelector(Class _class, SEL _oldSelector, SEL _newSelector) { Method method = nil; // First, look for the methods method = class_getInstanceMethod(_class, _oldSelector); if (method == nil) return NO; method->method_name = _newSelector; return YES; } Is there a complete example of how to override a method using SIMBL plugins? Thanks!

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  • Getting RSSIValue from IOBluetoothHostController

    - by Tanner Ezell
    I'm trying to write a simple application that gathers the RSSIValue and displays it via NSLog, my code is as follows: #import <Foundation/Foundation.h> #import <Cocoa/Cocoa.h> #import <IOBluetooth/objc/IOBluetoothDeviceInquiry.h> #import <IOBluetooth/objc/IOBluetoothDevice.h> #import <IOBluetooth/objc/IOBluetoothHostController.h> #import <IOBluetooth/IOBluetoothUtilities.h> @interface getRSSI: NSObject {} -(void) readRSSIForDeviceComplete:(id)controller device:(IOBluetoothDevice*)device info:(BluetoothHCIRSSIInfo*)info error:(IOReturn)error; @end @implementation getRSSI - (void) readRSSIForDeviceComplete:(id)controller device:(IOBluetoothDevice*)device info:(BluetoothHCIRSSIInfo*)info error:(IOReturn)error { if (error != kIOReturnSuccess) { NSLog(@"readRSSIForDeviceComplete return error"); CFRunLoopStop(CFRunLoopGetCurrent()); } if (info->handle == kBluetoothConnectionHandleNone) { NSLog(@"readRSSIForDeviceComplete no handle"); CFRunLoopStop(CFRunLoopGetCurrent()); } NSLog(@"RSSI = %i dBm ", info->RSSIValue); [NSThread sleepUntilDate: [NSDate dateWithTimeIntervalSinceNow: 5]]; [device closeConnection]; [device openConnection]; [controller readRSSIForDevice:device]; } @end int main (int argc, const char * argv[]) { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; NSLog(@"start"); IOBluetoothHostController *hci = [IOBluetoothHostController defaultController]; NSString *addrStr = @"xx:xx:xx:xx:xx:xx"; BluetoothDeviceAddress addr; IOBluetoothNSStringToDeviceAddress(addrStr, &addr); IOBluetoothDevice *device = [[IOBluetoothDevice alloc] init]; device = [IOBluetoothDevice withAddress:&addr]; [device retain]; [device openConnection]; getRSSI *rssi = [[getRSSI alloc] init]; [hci setDelegate:rssi]; [hci readRSSIForDevice:device]; CFRunLoopRun(); [hci release]; [rssi release]; [pool release]; return 0; } The problem I am facing is that the readRSSIForDeviceComplete seems to work just fine, info passes along a value. The problem is that the RSSI value is drastically different from the one I can view from OS X via option clicking the bluetooth icon at the top. It is typical for my application to print off 1,2,-1,-8,etc while the menu displays -64 dBm, -66, -70, -42, etc. I would really appreciate some guidance.

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  • Invoking external shell application through RubyCocoa

    - by Shyam
    Hi, How would I invoke an external application through the RubyCocoa bridge? I read something about NSTask, yet I have no idea how this should be translated in RubyCocoa. My goal is to have an IB_action to trigger a method which will run a terminal application with some parameters, i.e. ls -p $mydir, where mydir comes from an IB_outlet such as an Textfield. Any directions or help would be greatly appreciated!

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  • how do I call create a name of a button variable in a code, with a number in it? (hard to explain)

    - by Sam Jarman
    Ive got a int, that is changed in a previous method, that now has to be part of the name of a button variable eg int numberFromLastOne; numberFromLastOne = 4; I then want to get 'button4' to do something. Could i use something like this? [[button@"%d", numberFromLastOne] doSomethign:withSomethignElse]; Ive never had to do something this before.... Any ideas would be appreciated :) Sam

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  • insertNewObjectForEntityForName:inManagedObjectContext: returning NSNumber bug?

    - by beinstein
    I'm relatively well versed in CoreData and have been using it for several years with little or no difficulty. For the life of me, I can't figure out why insertNewObjectForEntityForName:inManagedObjectContext: is all of a sudden returning some sort of strange instance of NSNumber. GDB says the returned object is of the correct custom subclass of NSManagedObject, but when I go to print a description of the NSManagedObject itself, I get the following error: *** -[NSCFNumber objectID]: unrecognized selector sent to instance 0x3f26f50 What's even stranger, is that I'm able to set some relationships and attributes using setValue:forKey: and all is good. But when I try to set one specific relationship, I get this error: *** -[NSCFNumber entity]: unrecognized selector sent to instance 0x3f26f50 I've tried everything from clean all targets, to restarting both mac and iPhone, even editing the model so that the relationship in question is to-one instead of to-many. No matter what I do, the same problem appears. Has anyone ever seen anything like this before?

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  • Monitor Network Traffic Mac

    - by Tom Irving
    I'm wondering how to go about monitoring network traffic on my Mac. Like the way activity monitor does it, showing the bytes / packets in and out. I know it's a bit vague, but I'm unsure of the best place to start.

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  • How to create constant NSString by concatenating strings in Obj-C ?

    - by eric-morand
    Hi guys, I'm trying to instanciate a constant NSString by concatanating other NSString instances. Here is what I'm doing in my implementation file : static NSString *const MY_CONST = @"TEST"; static NSString *const MY_CONCATENATE_CONST = [NSString stringWithFormat:@"STRING %@", MY_CONST]; It leads to the following compilation error : Initializer element is not constant I suppose this is because stringWithFormat doesn't return a constant NSString, but since there is no other way to concatenate strings in Obj-C, what am I supposed to do ? Thanks for your help, Eric.

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  • Drawing individual pixels with iphone sdk.

    - by blob8108
    Hi, I've been trying to figure out how to make a powder toy style game on the iPhone. My problem is how to draw pixels to the screen. From what I've read, OpenGL is better for games as it is faster/hardware accelerated, but there is no method to draw pixels directly to the screen. Apparently drawing pixels to an off-screen frame buffer is the way to go, but how do I then pass this to OpenGL? Do I use a texture? (this is assuming I have no previous knowledge of iPhone graphics programming). Thanks!

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  • Changing a view after modalViewController is dismissed (Cocoa Touch)

    - by Calvin L
    I have a viewController that presents a modalViewController when a UINavigationBarItem is touched. After the user is done with the modal view, the modalViewController is dismissed. At this point I want to change/remove the NavigationBarItem -- how would I accomplish this? I was thinking of using viewWillAppear: but I only want the change to happen when the modalViewController is dismissed.

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  • Equivalent Carbon 32-bit call for using in 64-bit application - GetApplicationEventTarget().

    - by Dheeraj
    Hi All, I'm writing a 64-bit Cocoa application. I need to register for global key events. So I wrote this piece of code : - (void)awakeFromNib { EventHotKeyRef gMyHotKeyRef; EventHotKeyID gMyHotKeyID; EventTypeSpec eventType; eventType.eventClass=kEventClassKeyboard; eventType.eventKind=kEventHotKeyPressed; eventType.eventClass=kEventClassKeyboard; eventType.eventKind=kEventHotKeyPressed; InstallApplicationEventHandler(&MyHotKeyHandler,1,&eventType,NULL,NULL); gMyHotKeyID.signature='htk1'; gMyHotKeyID.id=1; RegisterEventHotKey(49, cmdKey+optionKey, gMyHotKeyID, **GetApplicationEventTarget**(), 0, &gMyHotKeyRef); } But since GetApplicationEventTarget() is not supported for 64-bit applications I'm getting errors. If I declare it, then I don't get any errors but the application crashes. Is there any equivalent method for GetApplicationEventTarget() (defined in Carbon framework) to use in 64-bit applications. Or is there any way to get the global key events using cocoa calls? Any help is appreciated. Thanks, Dheeraj.

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  • Core Data, Bindings, value transformers : crash when saving

    - by Gael
    Hi, I am trying to store a PNG image in a core data store backed by an sqlite database. Since I intend to use this database on an iPhone I can't store NSImage objects directly. I wanted to use bindings and an NSValueTransformer subclass to handle the transcoding from the NSImage (obtained by an Image well on my GUI) to an NSData containing the PNG binary representation of the image. I wrote the following code for the ValueTransformer : + (Class)transformedValueClass { return [NSImage class]; } + (BOOL)allowsReverseTransformation { return YES; } - (id)transformedValue:(id)value { if (value == nil) return nil; return [[[NSImage alloc] initWithData:value] autorelease]; } - (id)reverseTransformedValue:(id)value { if (value == nil) return nil; if(![value isKindOfClass:[NSImage class]]) { NSLog(@"Type mismatch. Expecting NSImage"); } NSBitmapImageRep *bits = [[value representations] objectAtIndex: 0]; NSData *data = [bits representationUsingType:NSPNGFileType properties:nil]; return data; } The model has a transformable property configured with this NSValueTransformer. In Interface Builder a table column and an image well are both bound to this property and both have the proper value transformer name (an image dropped in the image well shows up in the table column). The transformer is registered and called every time an image is added or a row is reloaded (checked with NSLog() calls). The problem arises when I am trying to save the managed objects. The console output shows the error message : [NSImage length]: unrecognized selector sent to instance 0x1004933a0 It seems like core data is using the value transformer to obtain the NSImage back from the NSData and then tries to save the NSImage instead of the NSData. There are probably workarounds such as the one presented in this post but I would really like to understand why my approach is flawn. Thanks in advance for your ideas and explanations.

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  • how to search in contact list like messages application in iphone with adding selected item in front

    - by Hiren Gujarati
    I needs to make application like messages application in iphone. Just needs To:(search text) and below it there is contact list. If user type in search text then list automatically filtered & when user select particular row then it is visible in front of To: & then again user is able to search text like in messages application. You can see the following video http://www.apple.com/iphone/iphone-3gs/messages.html#video that shows how recipients are added one by one. Please suggest your way for this.. Thanks in advance.

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