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POiPhone: Create a screenshot programmatically and then add it as a subview
 

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    <p>I would like to call a method which takes a screenshot and then load this screenshot as a subview. I am using Apples sample code on how to take a screen shot (see below) and was trying to use the result (an image) in my code. However, I don't really know how to get the image from the method into my code. This is what I tried; it's obviously wrong, but it's all I could come up with:</p> <pre><code> // Test Screenshot: screenShot = [UIImage screenshot]; // THIS DOESN'T WORK screenShotView = [[UIImageView alloc] initWithImage:screenShot]; [screenShotView setFrame:CGRectMake(0, 0, 320, 480)]; [self.view addSubview:screenShotView]; </code></pre> <p>And this is Apple's sample code for the method:</p> <pre><code> - (UIImage*)screenshot { NSLog(@"Shot"); // Create a graphics context with the target size // On iOS 4 and later, use UIGraphicsBeginImageContextWithOptions to take the scale into consideration // On iOS prior to 4, fall back to use UIGraphicsBeginImageContext CGSize imageSize = [[UIScreen mainScreen] bounds].size; if (NULL != UIGraphicsBeginImageContextWithOptions) UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0); else UIGraphicsBeginImageContext(imageSize); CGContextRef context = UIGraphicsGetCurrentContext(); // Iterate over every window from back to front for (UIWindow *window in [[UIApplication sharedApplication] windows]) { if (![window respondsToSelector:@selector(screen)] || [window screen] == [UIScreen mainScreen]) { // -renderInContext: renders in the coordinate space of the layer, // so we must first apply the layer's geometry to the graphics context CGContextSaveGState(context); // Center the context around the window's anchor point CGContextTranslateCTM(context, [window center].x, [window center].y); // Apply the window's transform about the anchor point CGContextConcatCTM(context, [window transform]); // Offset by the portion of the bounds left of and above the anchor point CGContextTranslateCTM(context, -[window bounds].size.width * [[window layer] anchorPoint].x, -[window bounds].size.height * [[window layer] anchorPoint].y); // Render the layer hierarchy to the current context [[window layer] renderInContext:context]; // Restore the context CGContextRestoreGState(context); } } // Retrieve the screenshot image UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return image; } </code></pre> <p>Any help would be very much appreciated! Thanks.</p> <hr> <p>EDIT: This is the viewDidLoad method in which I create a TextView and then try to capture a screen shot of it:</p> <pre><code> - (void)viewDidLoad { // Setup TextView: NSString* someText = @"Some Text"; CGRect frameText = CGRectMake(0, 0, 320, 480); aTextView = [[UITextView alloc] initWithFrame:frameText]; aTextView.text = someText; [self.view addSubview:aTextView]; // Test Screenshot: screenShotView = [[UIImageView alloc] initWithImage:[self screenshot]]; [screenShotView setFrame:CGRectMake(10, 10, 200, 200)]; [self.view addSubview:screenShotView]; [self.view bringSubviewToFront:screenShotView]; [super viewDidLoad]; } </code></pre>
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