具有非有限位置的子层[inf inf] [英] sublayer with non-finite position [inf inf]

问题描述

我正在使用Objective-C编写的第三个CocoaPods库来截取UITextView的截图。对于iOS 8来说没关系，但是在我更改iOS 9和Swift 2的语法后，它会抛出一个错误：

I am using a third CocoaPods library written in Objective-C to take a screenshot of a UITextView. It was OK for iOS 8, but after I change the syntax for iOS 9 and Swift 2, it throws an error:

终止app到期未被捕获的异常'CALayerInvalidGeometry'，原因：'子层有非有限位置[inf inf]'

Terminating app due to uncaught exception 'CALayerInvalidGeometry', reason: 'sublayer with non-finite position [inf inf]'

这是来自的代码library：

Here is the code from the library:

- (UIImage *)screenshotForCroppingRect:(CGRect)croppingRect
{
    UIGraphicsBeginImageContextWithOptions(croppingRect.size, NO, [UIScreen mainScreen].scale);
    // Create a graphics context and translate it the view we want to crop so
    // that even in grabbing (0,0), that origin point now represents the actual
    // cropping origin desired:
    CGContextRef context = UIGraphicsGetCurrentContext();
    if (context == NULL) return nil;

    NSLog(@"hiii :%f" , croppingRect.size.width);

    CGContextTranslateCTM(context, -croppingRect.origin.x, -croppingRect.origin.y);

    [self layoutIfNeeded];
    [self.layer renderInContext:context];

    UIImage *screenshotImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return screenshotImage;
}

问题是这一行：

[self.layer renderInContext:context];

我意识到这是因为我试图拍摄包含UIScrollView的UIView的快照。如果我删除UIScrollView子视图，则错误消失。

I realize this is because I am trying to take a snapshot of the UIView which contain a UIScrollView. If I remove the UIScrollView subview, the error is gone.

那是什么意思？

具有非有限位置的子层[ inf inf]

sublayer with non-finite position [inf inf]

任何人都有同样的问题，你是如何解决的？

Anyone having the same issue and how did you solve it?

推荐答案

以下是我如何解决这个问题：

Here is how I solved this:

关注此帖子

https://github.com/facebook/ios-snapshot-test-case/issues / 112

错误来自我使用的库，因此搜索所有文件并查找

the error is coming from the library I used, so do a search on all the files and find out

CGRectNull

并将它们全部更改至

CGRectZero

解决了这个问题。

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