[英]Capture Screen while animating
我需要在制作動畫時捕獲視圖。 我正在使用以下代碼在動畫時捕獲圖像。
myTimer = [NSTimer scheduledTimerWithTimeInterval:0.10 target: self selector:@selector(captureImage:) userInfo: nil repeats: YES];
[[NSRunLoop mainRunLoop] addTimer:myTimer forMode:NSRunLoopCommonModes];
UIImage * toImage = [[AppDelegateObj resultedImageArray]objectAtIndex:1];
[UIView transitionWithView:beforeImgView
duration:5
options:UIViewAnimationOptionTransitionCrossDissolve
animations:^{
beforeImgView.image = toImage;
}
completion:^(BOOL finished) {
[myTimer invalidate];
}];
}
-(void)captureImage:(NSTimer*) t {
CALayer *layer;
layer = [self.view.layer presentationLayer];
UIGraphicsBeginImageContext(self.view.bounds.size);
CGContextClipToRect (UIGraphicsGetCurrentContext(),self.view.frame);
[layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
}
它僅捕獲結果圖像
您可以使用具有動畫對象的視圖副本,並使用該副本視圖捕獲屏幕。 即
UIView *copyView = [self.view mutableCopy];
CALayer *layer;
layer = [copyView.layer presentationLayer];
UIGraphicsBeginImageContext(self.view.bounds.size);
CGContextClipToRect (UIGraphicsGetCurrentContext(),copyView.frame);
[layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
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