objective c - EXC_BAD_ACCESS on UITextView text update -


i have problem, randomly i'm getting weird crash on app, have no idea why.. textfield allocated 

[[uitextview alloc] initwithframe:cgrectzero];

could me fix this, or @ least tell me wrong? read on internet trying access pointer gone , app crashes.

weird crash

the method

- (void)settext:(nsstring*)text textview:(uitextview*)textview{     if (textview != nil) {           dispatch_async(dispatch_get_main_queue(), ^{             if ([textview iskindofclass:[uitextview class]]) {                 textview.text = text;                 cgsize textviewsize = [textview sizethatfits:cgsizemake(textview.frame.size.width, flt_max)];                 textview.frame = cgrectmake(textview.frame.origin.x,                                             textview.frame.origin.y,                                             textview.contentsize.width,                                             textviewsize.height);              }         });     } }


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