uiview 和 scrollview截图

//截取ScrollView
- (UIImage*)screenView:(UIScrollView *)scrollView
{
     UIImage* image = nil;
    UIGraphicsBeginImageContextWithOptions(CGSizeMake(kScreen_width, scrollView.contentSize.height), YES, 0.0);
    {
        CGPoint savedContentOffset = scrollView.contentOffset;
        CGRect savedFrame = scrollView.frame;
        scrollView.contentOffset = CGPointZero;
        scrollView.frame = CGRectMake(0, 0, kScreen_width, scrollView.contentSize.height);
        
        [scrollView.layer renderInContext: UIGraphicsGetCurrentContext()];
        image = UIGraphicsGetImageFromCurrentImageContext();
        
        scrollView.contentOffset = savedContentOffset;
        scrollView.frame = savedFrame;
    }
    UIGraphicsEndImageContext();
    
    if (image != nil) {
        return image;
    }
    return nil;

}

//截取UIView
- (UIImage*)screenViewWithView:(UIView *)view
{
    
    //    //高清晰截图
        UIGraphicsBeginImageContextWithOptions(CGSizeMake(view.frame.size.width, view.frame.size.height), YES, 0.0);
        CGContextRef context = UIGraphicsGetCurrentContext();
        [view.layer renderInContext:context];
        UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();
    
    return image;
}