Question

我需要在动画制作时捕捉视图。以下代码我用来捕捉动画时的图像。

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);
}

它只捕获结果图像

Answer 1

您可以使用具有动画对象的视图副本，并使用该副本视图捕获屏幕。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);

动画时捕捉屏幕

1 个答案: