Presenting ViewController from UIAlertView
Something I face this morning which was annoying ,is That I was trying to present a ViewController
After user Tap on a UIAlertView button.
The result was this console log !!
"uialertview Warning: Attempt to present <_UIModalItemsPresentingViewController: > on <_UIModalItemAppViewController: > which is already presenting"
The Code I was using looked like this :
UIAlertView * alert =[[[UIAlertView alloc] initWithTitle:TITLE \
message:MSG \
delegate:Dgt \
cancelButtonTitle:@"OK" \
otherButtonTitles:nil] show];
And in The AlertView Delegate I called presentViewController
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
MOImageViewController *_imageVC =[[UIStoryboard storyboardWithName:@"Main" bundle:nil] instantiateViewControllerWithIdentifier:@"imageScreen"];
[_imageVC setImageURLString:urlString];
// topViewController
[[self topViewController] presentViewController:_imageVC animated:YES completion:Nil];
}
What turned out is that UIAlertView is treated like viewController and upon clicking at one of its Buttons it gets dismissed, So in the previous code am presenting a new viewController while dismissing the AlertView Which gives me the mentioned warning .
The simplest solution for this is simply using another AlertView Delegate which is
-(void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex{
// presenting view controller here safely
}
Thats it :)
