Question

我正在尝试拍摄UIView的截图/快照。我可以使用当前可见视图下面的代码获取屏幕截图 - 但我是在整个视图之后。

该视图是一个滚动视图，因此下面的内容是不可见的，我想包含

如何扩展此代码以考虑不可见的视图？

UIGraphicsBeginImageContext(activityView.frame.size);

[self.activityView.layer renderInContext:UIGraphicsGetCurrentContext()];

UIImage *fullScreenshot = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

UIImageWriteToSavedPhotosAlbum(fullScreenshot, nil, nil, nil);

Answer 1

试试这个：

CGSize fittingSize = [yourScrollView sizeThatFits:CGSizeZero];
UIGraphicsBeginImageContext(fittingSize);
[yourScrollView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *capImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

Answer 2

iOS 7为类UIView引入了一种新方法。

- (UIView *)snapshotViewAfterScreenUpdates:(BOOL)afterUpdates;
 - (UIView *)resizableSnapshotViewFromRect:(CGRect)rect afterScreenUpdates:(BOOL)afterUpdates withCapInsets:(UIEdgeInsets)capInsets;

您可以使用此方法截取当前视图的屏幕截图。

Answer 3

尝试这种方式可能会对你有所帮助

    UIImage *screenshotImage;
        UIGraphicsBeginImageContext(self.view.bounds.size);
        [self drawLayer:self.view.layer inContext:UIGraphicsGetCurrentContext()];
        [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
        screenshotImage = UIGraphicsGetImageFromCurrentImageContext();
        img.image=screenshotImage;
        UIGraphicsEndImageContext();
        CGImageRef cgImg = CGImageCreateWithImageInRect(screenshotImage.CGImage, CGRectMake(0, 0, 320, 460));
        UIImage* part = [UIImage imageWithCGImage:cgImg];
        UIImageView* iv = [[UIImageView alloc] initWithImage:part];

        UIImageWriteToSavedPhotosAlbum(screenshotImage, nil, nil, nil);

Answer 4

我发现了这个问题。 scrollview是我拍摄快照的视图的子视图。为了解决这个问题，我深入了解了正确的观点。

UIGraphicsBeginImageContext(activityView.scrollView.scrollableView.frame.size);

[self.activityView.scrollView.scrollableView.layer renderInContext:UIGraphicsGetCurrentContext()];

UIImage *fullScreenshot = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

UIImageWriteToSavedPhotosAlbum(fullScreenshot, nil, nil, nil);

拍摄整个UIView - iPhone的快照/截图

4 个答案: