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POObjective C, Thread 1 Program Received Signal SIGABRT
 

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    <p>I am trying to compile and run a simple tutorial for an Objective C app using Interface Builder. I am using Xcode 4.0.2 and simulating on iOS (iPhone) 4.3</p> <p><a href="http://www.switchonthecode.com/tutorials/creating-your-first-iphone-application-with-interface-builder">http://www.switchonthecode.com/tutorials/creating-your-first-iphone-application-with-interface-builder</a></p> <p>When I build the project, it builds alright but once the app tries to run it crashes with:</p> <pre><code>int main(int argc, char *argv[]) { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; int retVal = UIApplicationMain(argc, argv, nil, @"SimpleUIAppDelegate"); [pool release]; return retVal; } </code></pre> <p>I get the error on line 4: int retVal = UI... Thread 1: Program Received Signal "SIGABRT".</p> <p>If the other files of this project need to be posted for clarity, I can do that.</p> <p>Thanks!</p> <p>Edit:</p> <p>SimpleUIViewController.h:</p> <pre><code>#import &lt;UIKit/UIKit.h&gt; @interface SimpleUIViewController : UIViewController &lt;UITextFieldDelegate&gt; { UITextField *textInput; UILabel *label; NSString *name; } @property (nonatomic, retain) IBOutlet UITextField *textInput; @property (nonatomic, retain) IBOutlet UILabel *label; @property (nonatomic, copy) NSString *name; - (IBAction)changeGreeting:(id)sender; @end </code></pre> <p>SimpleUIViewController.m:</p> <pre><code>#import "SimpleUIViewController.h" @implementation SimpleUIViewController @synthesize textInput; @synthesize label; @synthesize name; - (IBAction)changeGreeting:(id)sender { self.name = textInput.text; NSString *nameString = name; if([nameString length] == 0) { nameString = @"Inigo Montoya"; } NSString *greeting = [[NSString alloc] initWithFormat:@"Hello, my name is %@!", nameString]; label.text = greeting; [greeting release]; } - (BOOL)textFieldShouldReturn:(UITextField *)theTextField { if(theTextField == textInput) { [textInput resignFirstResponder]; } return YES; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Release anything that's not essential, such as cached data } - (void)dealloc { [textInput release]; [label release]; [name release]; [super dealloc]; } @end </code></pre> <p>Error message:</p> <pre><code>This GDB was configured as "x86_64-apple-darwin".Attaching to process 2668. 2011-06-09 11:20:21.662 InterfaceBuilder[2668:207] Unknown class InterfaceBuilderAppDelegate_iPhone in Interface Builder file. 2011-06-09 11:20:21.666 InterfaceBuilder[2668:207] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[&lt;UIApplication 0x4b1a900&gt; setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key textInput.' *** Call stack at first throw: ( 0 CoreFoundation 0x00dc25a9 __exceptionPreprocess + 185 1 libobjc.A.dylib 0x00f16313 objc_exception_throw + 44 2 CoreFoundation 0x00dc24e1 -[NSException raise] + 17 3 Foundation 0x00794677 _NSSetUsingKeyValueSetter + 135 4 Foundation 0x007945e5 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 285 5 UIKit 0x0021030c -[UIRuntimeOutletConnection connect] + 112 6 CoreFoundation 0x00d388cf -[NSArray makeObjectsPerformSelector:] + 239 7 UIKit 0x0020ed23 -[UINib instantiateWithOwner:options:] + 1041 8 UIKit 0x00210ab7 -[NSBundle(UINSBundleAdditions) loadNibNamed:owner:options:] + 168 9 UIKit 0x0001617a -[UIApplication _loadMainNibFile] + 172 10 UIKit 0x00016cf4 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 291 11 UIKit 0x00021617 -[UIApplication handleEvent:withNewEvent:] + 1533 12 UIKit 0x00019abf -[UIApplication sendEvent:] + 71 13 UIKit 0x0001ef2e _UIApplicationHandleEvent + 7576 14 GraphicsServices 0x00ffb992 PurpleEventCallback + 1550 15 CoreFoundation 0x00da3944 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52 16 CoreFoundation 0x00d03cf7 __CFRunLoopDoSource1 + 215 17 CoreFoundation 0x00d00f83 __CFRunLoopRun + 979 18 CoreFoundation 0x00d00840 CFRunLoopRunSpecific + 208 19 CoreFoundation 0x00d00761 CFRunLoopRunInMode + 97 20 UIKit 0x000167d2 -[UIApplication _run] + 623 21 UIKit 0x00022c93 UIApplicationMain + 1160 22 InterfaceBuilder 0x000027ff main + 127 23 InterfaceBuilder 0x00002775 start + 53 24 ??? 0x00000001 0x0 + 1 ) terminate called after throwing an instance of 'NSException' sharedlibrary apply-load-rules all Current language: auto; currently objective-c (gdb) </code></pre> <p>Im new to obj-c, and have absolutely no idea what I'm looking at in regards to that error message. Any help?</p>
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    1. COYup, I think you will have to provide much more code and more crash info... Have you got anything else than SIGABRT, like an exception, a call stack, etc... ?
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    2. COIs that enough? It's pretty much everything.
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    3. COYes! That should be enough to give you an answer, I'm parsing it right now.
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