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Editorial Team
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Asked: 2026-05-28T03:52:53+00:00

I get the following error, and i have no clue how to avoid it,

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I get the following error, and i have no clue how to avoid it, can someone please help me

bool _WebTryThreadLock(bool), 0x1ea990: Tried to obtain the web lock from a thread other than the main thread or the web thread. This may be a result of calling to UIKit from a secondary thread. Crashing now… 

 - (void)loadImg {
        NSData* image = [[NSData alloc] initWithContentsOfURL:[NSURL URLWithString:@"http://images.sugarscape.com/userfiles/image/DECEMBER2010/Lozza/HarryStyles2.jpg"]];
        UIImage* img = [[UIImage alloc] initWithData:image] ;
        [self performSelectorInBackground:@selector(showImg:) withObject:img];
    }
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1 Answer

  1. Editorial Team

    Don’t call any UIKit methods from threads other than the main thread. performSelectorInBackground:withObject: executes showImg: on a secondary thread, and if you call any UIKit methods there, that might be the problem.

    It is actually explained in plain English:

    This may be a result of calling to UIKit from a secondary thread

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