App crash on 4.0 but not on 5.0

Question

I trying to fix a strange bugg. People with IOS 4 can't even start my app after the update before it crashes. IOS 5 devices works great.

The things that comes to mind that I added in the last update is blocks. But block should work on ios4, right?

IOS 4.3 simulator works great, but a 4.2.1 3GS crashes on the dispatch_async code below.

I know there isn't much info here, but any suggestion would be appriciated.

Thanks in advance

1. dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND,0), ^(void) { dispatch_async(dispatch_get_main_queue(), ^(void) { 2. [UIView animateWithDuration:0.25f animations:^ { myView.alpha = 0; }];

possible duplicate of GCD dispatch_after call causing SIGBUS signal — Parag Bafna
– Parag Bafna, Commented Jun 29, 2012 at 6:52

Community · Accepted Answer · 2017-05-23 10:34:26Z

2

See my answer to this question. The problem is DISPATCH_QUEUE_PRIORITY_BACKGROUND.

edited May 23, 2017 at 10:34

CommunityBot

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answered Jun 29, 2012 at 6:38

borrrden

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