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POUIGraphicsBeginImageContextWithOptions not capturing shadows / gradients
 

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  1. POUIGraphicsBeginImageContextWithOptions not capturing shadows / gradients
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    <p><strong>THE PROBLEM</strong></p> <p>I'm using UIGraphicsBeginImageContextWithOptions to save a screenshot into a UIImage. While this works, the resulting UIImage is missing any shadows and gradients.</p> <p>How do I get it to also screenshot the layer stuff?</p> <hr> <p><strong>TEST CODE SHOWING THE PROBLEM</strong></p> <hr> <pre><code>#import "ViewController.h" #import &lt;QuartzCore/QuartzCore.h&gt; @implementation ViewController - (void)viewDidLoad { //super [super viewDidLoad]; //background self.view.backgroundColor = [UIColor whiteColor]; //container UIView *container = [[UIView alloc] initWithFrame:CGRectMake(10, 10, 300, 200)]; container.backgroundColor = [UIColor blackColor]; [self.view addSubview:container]; //circle UIView *circle = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 10, 10)]; circle.backgroundColor = [UIColor whiteColor]; circle.layer.cornerRadius = 5; circle.layer.shadowColor = [UIColor redColor].CGColor; circle.layer.shadowOffset = CGSizeZero; circle.layer.shadowOpacity = 1; circle.layer.shadowRadius = 10; circle.layer.shadowPath = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(-10, -10, 30, 30)].CGPath; [container addSubview:circle]; //screenshot UIGraphicsBeginImageContextWithOptions(container.bounds.size, container.opaque, 0.0); [container.layer renderInContext:UIGraphicsGetCurrentContext()]; UIImage *screenshot = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); //image view UIImageView *iv = [[UIImageView alloc] initWithFrame:CGRectMake(10, 568-200-20-10, 300, 200)]; iv.image = screenshot; [self.view addSubview:iv]; } @end </code></pre> <hr> <p><strong>SIMULATOR SCREENSHOT SHOWING THE PROBLEM</strong></p> <hr> <p>The top area is the original view. The bottom area is a UIImageView with the screenshot.</p> <p><img src="https://i.stack.imgur.com/wHGLu.png" alt="Simulator Screenshot"></p>
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    1. CO[[circle layer] setNeedsDisplay];
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      1. USMatt Long
    2. COJust tried setNeedsDisplay. Called it every other line just to be safe. Still no shadow in the screenshot.
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