UIScrollView,UIView截屏代码

//截图

UIView:截全图

-(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：截取部分视图

-(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;
}