iOS

Question

我有这个代码：

CGImageRef imageRef = CGImageCreateWithImageInRect([image CGImage], rect);
UIImage *outputimage = [UIImage imageWithCGImage:imageRef
                                           scale:image.scale
                                     orientation:UIImageOrientationUp];

我收到警告：

Object leaked: object allocated and stored into 'imageRef' is not referenced later in this execution path and has a retain count of +1

但我正在使用 ARC，无法使用 release 或 autoRelease。如何解决？

Answer 1

只需添加此代码

CGImageRelease(imageRef);

来自 CGImageCreateWithImageInRect 文档，

The resulting image retains a reference to the original image, which means you may release the original image after calling this function.

所以，你需要做的就是调用 CGImageRelease 让它保留计数 -1

iOS - CGImageRef 潜在泄漏

iOS - CGImageRef Potential Leak

memory-leaks

cgimageref