IOS-When VPImageCropper is used, Analyze displays Potential leak of an object stored into & #39; subImageRef & #39 ;,

IOS-When VPImageCropper is used, Analyze displays Potential leak of an object stored into 'subimageref ',

This problem occurs during analyze today. It is a third-party image cropping class called VPImageCropper. It turns out that there is a problem in it and you will understand it. when CGImageCreateWithImageInRect is called, The subImageRef memory count is + 1, but it is not release after use.

The problem arises. This VPImageCropper supports ARC, which means the system is not easy to use and cannot be released. In this way, memory leakage will occur.

Later, stackoverflow found such a paragraph.

ARC does not manage C-types, of which CGImage may be considered. You must release the ref manually when you are finishedCGImageRelease (image );

That is to say, in arc mode, not all objects such as C-types can be released manually.

Add this sentence CGImageRelease (subImageRef)

Now let's take a look at the solution ~