IOSスクリーンショットUIscrollview
1859 ワード
//スクリーンショットUIView:スクリーンショット
UIView:一部のビューを切り取る
-(UIImage*)imageFromView:(UIView *)theView atFrame:(CGRect)rect
{
UIGraphicsBeginImageContext(theView.frame.size);
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSaveGState(context);
UIRectClip(rect);
[theView.layer renderInContext:context];
UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return theImage;
}
UIScrollView:
-(UIImage*)captureView:(UIView *)theView{
CGRect rect = theView.frame;
if ([theView isKindOfClass:[UIScrollView class]]) {
rect.size = ((UIScrollView *)theView).contentSize;
}
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
[theView.layer renderInContext:context];
UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return img;
}
UIView:一部のビューを切り取る
-(UIImage*)imageFromView:(UIView *)theView atFrame:(CGRect)rect
{
UIGraphicsBeginImageContext(theView.frame.size);
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSaveGState(context);
UIRectClip(rect);
[theView.layer renderInContext:context];
UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return theImage;
}
UIScrollView:
- (UIImage *)captureScrollView:(UIScrollView *)scrollView{
UIImage* image = nil;
UIGraphicsBeginImageContext(scrollView.contentSize);
{
CGPoint savedContentOffset = scrollView.contentOffset;
CGRect savedFrame = scrollView.frame;
scrollView.contentOffset = CGPointZero;
scrollView.frame = CGRectMake(0, 0, scrollView.contentSize.width, scrollView.contentSize.height);
[scrollView.layer renderInContext: UIGraphicsGetCurrentContext()];
image = UIGraphicsGetImageFromCurrentImageContext();
scrollView.contentOffset = savedContentOffset;
scrollView.frame = savedFrame;
}
UIGraphicsEndImageContext();
if (image != nil) {
return image;
}
return nil;
}