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POCustom segue animating with delay after code being run. (Objective C)
 

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  1. POCustom segue animating with delay after code being run. (Objective C)
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    <p>I have several <code>dispatch_async</code> methods linked so they authenticate a user in my system.</p> <p>The next async method only happens when the previous one finishes, as they each have completion handlers.</p> <p>When the last one is finished I perform a custom segue with 2 <code>uiview</code> animation blocks.</p> <p>However, when I log when each of these actually run, there is a considerable gap between the log and the animation actually happening, eventually the views animate and the completion block is called.</p> <p>I don't really know how useful it would be adding my code here, but i have tested and it must be the async methods because if I comment them out and just return <code>YES</code> the animations happen without delay at the same time as the log.</p> <p>Does anyone know why this might happen?</p> <p><strong>EDIT *(with code)</strong></p> <p>Typical 'exist check' used for email, user, user id.</p> <pre><code>- (void)existsInSystemWithCompletionHandler:(void (^)(BOOL))block { self.existsInSystem = NO; if (self.isValid) { dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ // // Get data // if (dataIsValid) { block(YES); } else { block(NO); } }); } else { block(self.existsInSystem); } } </code></pre> <p>Check user exists</p> <pre><code>[potentialUser existsInSystemWithCompletionHandler:^(BOOL success) { if (success) { // Perform segue // [self performSegueWithIdentifier:@"Logging In" sender:self]; } }]; </code></pre> <p>Segue</p> <pre><code>- (void)perform { NSLog(@"Perform"); LogInViewController *sourceViewController = (LogInViewController *)self.sourceViewController; LoggingInViewController *destinationViewController = (LoggingInViewController *)self.destinationViewController; destinationViewController.user = sourceViewController.potentialUser; // Animate // [UIView animateWithDuration:0.2f animations:^{ NSLog(@"Animation 1"); // // Animate blah blah blah // }]; [UIView animateWithDuration:0.4f delay:0.0f options:UIViewAnimationOptionCurveEaseIn animations:^{ NSLog(@"Animation 2"); // // Animate blah blah blah // } completion:^(BOOL finished) { NSLog(@"Completion"); // // Finished // [sourceViewController presentViewController:destinationViewController animated:NO completion:nil]; }]; } </code></pre> <p>LoggingIn VC</p> <pre><code>- (void)viewDidAppear:(BOOL)animated { [super viewDidAppear:animated]; [self.user loginWithCompletionHandler:^(BOOL success) { if (success) { [self performSegueWithIdentifier:@"Logged In" sender:self]; } }]; } </code></pre>
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    1. USAdam Carter
    1. USAdam Carter
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    1. COTo what and from where do you return YES?
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      1. POCustom segue animating with delay after code being run. (Objective C)
      1. USMundi
    2. COI return yes to the completion block, comment out all async stuff and add the line `completionBlock(YES);`
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      1. POCustom segue animating with delay after code being run. (Objective C)
      1. USAdam Carter
    3. COPost your code, it's impossible to tell without taking a look.
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      1. POCustom segue animating with delay after code being run. (Objective C)
      1. USmax_
 

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