Method not running - iOS

Question

I have a very simply method. However in the method the UIAlertView will not run.... Here is my method:

-(void)post_result {
    NSLog(@"Post Result");

    post_now.enabled = YES;
    [active stopAnimating];
    [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];

    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Success" message:@"You're post has been successfully uploaded." delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:nil];
    [alertView show];

    success_post_facebook = 0;
    success_post_youtube = 0;
    success_post_googleplus = 0;
    success_post_tumblr = 0;
    success_post_twitter = 0;

    NSLog(@"Post Result END");
}

The odd thing is that the code before and after the UIAlertView will run in this method.... So what an earth is wrong??

Thanks for your time.

Answer 1

Your are most likely calling that UIAlertView not on the main thread. To make it run on the main thread just use the main dispatch queue like so.

dispatch_async(dispatch_get_main_queue(), ^{
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Success" message:@"You're post has been successfully uploaded." delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:nil];
    [alertView show];
});