UIAlertView crash in iOS 6

Question

I have this code:

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:title message:msg delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
[alert release];

The problem is this code crash before it shows the alert, I have tested it on lower iOS and it work but on iOS 6 it crash.

What is the crash log? Is title and msg initialized? are you conforming to the UIAlertView delegate? — MCKapur, Oct 18 '12 at 09:06
Possible duplicated [a link](http://stackoverflow.com/questions/12408901/uialertview-causes-crash-in-ios-sdk-6-0) — Scar, Oct 18 '12 at 09:17
check this link: http://stackoverflow.com/a/12475858/1179680 — Arnlee Vizcayno, Oct 18 '12 at 09:29

score 10 · Accepted Answer · edited May 23 '17 at 12:22

10

I found the answer. I coded:

[alert performSelectorOnMainThread:@selector(show) withObject:nil waitUntilDone:YES];

instead of

[alert show];

it crash because the process might not be performed in the main thread.

Source from: https://stackoverflow.com/a/12475858/1179680

edited May 23 '17 at 12:22

Community

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answered Oct 18 '12 at 09:29

Arnlee Vizcayno

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You mean you have replace [alert show];.....code with [alert performSelectorOnMainThread:@selector(show) withObject:nil waitUntilDone:YES];...right? – Navnath Memane Nov 05 '12 at 10:27
Its not working for me. I have also the same problem above. can you suggest or should I place one question for this? – Navnath Memane Nov 05 '12 at 11:09
@NavnathMemane : yes ...replace the [alert show]; ...in this case, it crash because the process might not perform in the main thread and the thread might be release by arc. Somehow, I am sure that this issue is about performing the action into the right and not nil thread. If you can show some more error or crash log we can take a look on it. – Arnlee Vizcayno Nov 05 '12 at 11:53

UIAlertView crash in iOS 6

1 Answers1