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POTake a snapshot of a PKAddPassesViewController's view
 

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    <p>I'm trying to take a snapshot of the view displayed when the user is prompted to add a pass.</p> <p>The goal is being able to generate an image from a given pkpass</p> <p>I was hoping something like this could work:</p> <pre><code>NSString *filePath = [[NSBundle mainBundle] pathForResource:@"columbus" ofType:@"pkpass"]; PKPass *pass = [[PKPass alloc] initWithData:[NSData dataWithContentsOfFile:filePath] error:nil]; PKAddPassesViewController *pkAddPassesViewController = [[PKAddPassesViewController alloc] initWithPass:pass]; [self presentViewController:pkAddPassesViewController animated:YES completion:^(){ UIImage *image = [pkAddPassesViewController.view captureView]; UIImageView *imageView = [[UIImageView alloc] initWithImage:image]; [self.view addSubview:imageView]; }]; </code></pre> <p>With captureView being:</p> <pre><code>- (UIImage *)captureView { CGRect screenRect = self.bounds; UIGraphicsBeginImageContext(self.bounds.size); CGContextRef ctx = UIGraphicsGetCurrentContext(); [[UIColor clearColor] set]; CGContextFillRect(ctx, screenRect); [self.layer renderInContext:ctx]; UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return newImage; } </code></pre> <p>Guess what? I was wrong:</p> <p>I tried:</p> <ul> <li><p>Using the completion callback and the animationFinished callback</p></li> <li><p>Setting the hidden property</p></li> <li><p>Using a timer to make sure the pass was visible on screen when the screenshot was taken</p></li> <li><p>Taking a snapshot of the parent view</p></li> </ul> <p>I ran out of ideas, so any suggestion is appreciated Thanks in advance</p> <p>Oh, I've uploaded a minimal project here: <a href="https://github.com/framp/demo-capturing-passbook" rel="nofollow">https://github.com/framp/demo-capturing-passbook</a></p> <p>EDIT: I'm able to take a snapshot of other views and I can load other UIImage just fine with the code above. The UIImage which is returned is a blank image</p>
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    1. COThis is one of the things on my list to discuss with Apple next week. There seems to be some anomaly with the PKPassViewController. If I find, or if they can show me a solution, I will post here.
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    2. COI hope it's not intentional on their side (eg. to stop developers from generating images of passes)
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    3. COThat had crossed my mind too. I can think of a few cases where this could present a security risk, but at the end of the day I see no reason that would justify an intentional block.
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