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copied!<p>I've found a better method that uses the snapshot API whenever possible.</p> <p>I hope it helps.</p> <pre><code>class func screenshot() -> UIImage { var imageSize = CGSize.zero let orientation = UIApplication.shared.statusBarOrientation if UIInterfaceOrientationIsPortrait(orientation) { imageSize = UIScreen.main.bounds.size } else { imageSize = CGSize(width: UIScreen.main.bounds.size.height, height: UIScreen.main.bounds.size.width) } UIGraphicsBeginImageContextWithOptions(imageSize, false, 0) for window in UIApplication.shared.windows { window.drawHierarchy(in: window.bounds, afterScreenUpdates: true) } let image = UIGraphicsGetImageFromCurrentImageContext() UIGraphicsEndImageContext() return image! } </code></pre> <p><a href="https://developer.apple.com/library/ios/qa/qa1817/_index.html#//apple_ref/doc/uid/DTS40014134" rel="noreferrer">Wanna know more about iOS 7 Snapshots?</a></p> <p>Objective-C version:</p> <pre><code>+ (UIImage *)screenshot { CGSize imageSize = CGSizeZero; UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation; if (UIInterfaceOrientationIsPortrait(orientation)) { imageSize = [UIScreen mainScreen].bounds.size; } else { imageSize = CGSizeMake([UIScreen mainScreen].bounds.size.height, [UIScreen mainScreen].bounds.size.width); } UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0); CGContextRef context = UIGraphicsGetCurrentContext(); for (UIWindow *window in [[UIApplication sharedApplication] windows]) { CGContextSaveGState(context); CGContextTranslateCTM(context, window.center.x, window.center.y); CGContextConcatCTM(context, window.transform); CGContextTranslateCTM(context, -window.bounds.size.width * window.layer.anchorPoint.x, -window.bounds.size.height * window.layer.anchorPoint.y); if (orientation == UIInterfaceOrientationLandscapeLeft) { CGContextRotateCTM(context, M_PI_2); CGContextTranslateCTM(context, 0, -imageSize.width); } else if (orientation == UIInterfaceOrientationLandscapeRight) { CGContextRotateCTM(context, -M_PI_2); CGContextTranslateCTM(context, -imageSize.height, 0); } else if (orientation == UIInterfaceOrientationPortraitUpsideDown) { CGContextRotateCTM(context, M_PI); CGContextTranslateCTM(context, -imageSize.width, -imageSize.height); } if ([window respondsToSelector:@selector(drawViewHierarchyInRect:afterScreenUpdates:)]) { [window drawViewHierarchyInRect:window.bounds afterScreenUpdates:YES]; } else { [window.layer renderInContext:context]; } CGContextRestoreGState(context); } UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return image; } </code></pre>

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