IOS 螢幕截圖 UIScrollview

標籤：

//
UIView:截全圖

-(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：截取部分視圖

 

-(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;}

IOS 螢幕 UIScrollview