iOS : Application Crashes with error "Application failed to launch in time"

Question

My iOS app doesn't run in background. When home button is hit the app will terminate.

Below is my code

- (void)applicationDidEnterBackground:(UIApplication *)application 
{
  double sleepTime = [[UIApplication sharedApplication] backgroundTimeRemaining] - 1;

  [self performTaskforTime:sleepTime];
}

If the application is relaunched in no time, the New instance of the app will killed with the error :

Exception Type: 00000020 Exception Codes: 0x8badf00d Highlighted Thread: 0

Application Specific Information: My_App failed to launch in time

I can't reduce the sleep time. Is there any solution for this?

hypercrypt · Accepted Answer · 2011-10-19T21:01:31.287

0

You need to return from - (void)applicationDidEnterBackground:(UIApplication *)application, do something like this:

- (void)applicationDidEnterBackground:(UIApplication *)application 
{
  UIBackgroundTaskIdentifier btid = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:NULL];

  double sleepTime = [[UIApplication sharedApplication] backgroundTimeRemaining] - 1;

  dispatch_async(/* background queue */, ^{
    [self performTaskforTime:sleepTime];
    [[UIApplication sharedApplication] endBackgroundTask:btid];
  }
}

You don't want to block the main queue with a long running task as you won't be able to service the UI otherwise. Your application is busy with -performTaskforTime: and thus can't launch in time.

edited Oct 19 '11 at 21:01

answered Oct 19 '11 at 18:15

hypercrypt

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I tried this, since my app doesnt run in background will quit and the task will be never performed. – nswamy Oct 19 '11 at 18:17
Updated my answer. You need to call -beginBackgroundTaskWithExpirationHandler: to run in the background. – hypercrypt Oct 19 '11 at 21:02

score 0 · Answer 2 · edited May 23 '17 at 11:44

0

You can't block the main application thread for more than a few seconds. See this SO post.

Link

edited May 23 '17 at 11:44

Community

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answered Oct 19 '11 at 18:20

logancautrell

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I see the app is launched as a new instance, and in the new instance the thread is not blocked. – nswamy Oct 19 '11 at 18:26

iOS : Application Crashes with error "Application failed to launch in time"

2 Answers2