MBProgressHUD crashing the app while doing work in another thread

Asked Oct 02 '13 at 07:23

Active May 20 '18 at 17:41

Viewed 257 times

I am trying to do some work in thread for which I am using the MBProgressHUD. When I try to do the following code, it is crashing.

if ([database databaseNeedsMigration]) {
HUD = [[MBProgressHUD alloc] initWithView:self.view];
HUD.labelText = @"Upgrading Data";
HUD.detailsLabelText = @"Just relax";
HUD.mode = MBProgressHUDModeAnnularDeterminate;
[self.view addSubview:HUD];
HUD.taskInProgress = YES;
[[UIApplication sharedApplication] beginIgnoringInteractionEvents];
[HUD showAnimated:YES whileExecutingBlock:^{
[database migrateDatabase];
} onQueue:dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0) completionBlock:^{
     [[UIApplication sharedApplication] endIgnoringInteractionEvents];

     }];


}

However when I try to add a selector to MBProgressHUD with a sleep in the function it works.

edited May 20 '18 at 17:41

halfer

19,824
17
99
186

asked Oct 02 '13 at 07:23

Saty

2,563
3
37
88

Don't do UI stuff in background threads. – Kreiri Oct 02 '13 at 07:32
Can you add the exact exception you're getting? What line is crashing? – Stavash Oct 02 '13 at 07:33
maybe "migrateDatabese" updates part of the UI .. so it needs to be called on the main thread – TonyMkenu Oct 11 '13 at 13:25

MBProgressHUD crashing the app while doing work in another thread

0 Answers0