Sanity check: UIBarButtonItem crashes trying to perform action
- by Giao
One of my users is reporting a crash on his device, an iPhone 3GS. Other devices of the same type are not reporting similar behavior. He's sent me a crash log and based on reading it, I'm not sure how to proceed. I hope I'm not interpreting the crash log incorrectly but it doesn't look like my action has been called yet.
This is how I'm creating and setting up the UIBarButtonItem:
- (void)viewDidLoad {
[super viewDidLoad];
UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addLog:)];
self.navigationItem.rightBarButtonItem = addButton;
[addButton release];
}
This is the my action method:
- (IBAction)addLog:(id)sender {
MyViewController *myController = [[MyViewController alloc] initWithNibName:@"MyNib" bundle:nil];
UINavigationController *subNavigationController = [[UINavigationController alloc] initWithRootViewController: myController];
[self presentModalViewController:subNavigationController animated:YES];
[myController release];
[subNavigationController release];
}
This is the crash log:
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x00000000, 0x00000000Crashed Thread: 0
Thread 0 Crashed:
0 libSystem.B.dylib 0x0007e98c __kill + 81 libSystem.B.dylib 0x0007e97c kill + 4
2 libSystem.B.dylib 0x0007e96e raise + 10
3 libSystem.B.dylib 0x0009361a abort + 34
4 MyApp 0x000042e8 0x1000 + 13032
5 CoreFoundation 0x00058ede -[NSObject performSelector:withObject:withObject:] + 18
6 UIKit 0x0004205e -[UIApplication sendAction:to:from:forEvent:] + 78
7 UIKit 0x00094d4e -[UIBarButtonItem(Internal) _sendAction:withEvent:] + 86
8 CoreFoundation 0x00058ede -[NSObject performSelector:withObject:withObject:] + 18
9 UIKit 0x0004205e -[UIApplication sendAction:to:from:forEvent:] + 78
10 UIKit 0x00041ffe -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 26
11 UIKit 0x00041fd0 -[UIControl sendAction:to:forEvent:] + 32
12 UIKit 0x00041d2a -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 350
13 UIKit 0x0004263e -[UIControl touchesEnded:withEvent:] + 330
14 UIKit 0x00041656 -[UIWindow _sendTouchesForEvent:] + 318
15 UIKit 0x00041032 -[UIWindow sendEvent:] + 74
