Forked from anthonycastelli/UIImage+Snapshot.m
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September 9, 2015 01:21
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Snapshotting on iOS
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| + (UIImage *)snapshotView:(UIView *)view { | |
| UIGraphicsBeginImageContextWithOptions(view.frame.size, NO, [[UIScreen mainScreen] scale]); //0 | |
| [view drawViewHierarchyInRect:view.frame afterScreenUpdates:YES]; | |
| UIImage *snapshot = UIGraphicsGetImageFromCurrentImageContext(); | |
| UIGraphicsEndImageContext(); | |
| return snapshot; | |
| } | |
| + (UIImage *)snapshot { | |
| CGSize imageSize = CGSizeZero; | |
| UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation]; | |
| if (UIInterfaceOrientationIsPortrait(orientation) || (NSFoundationVersionNumber > NSFoundationVersionNumber_iOS_7_1) ) { | |
| imageSize = [UIScreen mainScreen].bounds.size; | |
| } else { | |
| imageSize = CGSizeMake([UIScreen mainScreen].bounds.size.height, [UIScreen mainScreen].bounds.size.width); | |
| } | |
| UIGraphicsBeginImageContextWithOptions(imageSize, NO, [[UIScreen mainScreen] scale]); | |
| 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 ((NSFoundationVersionNumber <= NSFoundationVersionNumber_iOS_7_1)) { | |
| 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; | |
| } |
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