Analyze检测内存泄漏的一些解决记录

1. Variable '****' is uninitialized when captured by block

    NSUInteger shaiwuID;
    if ([shaiwu isKindOfClass:[HHGuide class]]) {
        ...
        shaiwuID = shaiwuObj.guideID;
    } else if ([shaiwu isKindOfClass:[HHDiscount class]]) {
        ...
        shaiwuID = shaiwuObj.discountID;
    }

QQ20151014-0@2x.png

出现这个问题是，在completed的block里shaiwuID有可能没有被初始化。因为shaiwuID的赋值是在if - else if 里缺少默认的赋值，把第二个条件改为esle即可。

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2. call to function 'CGImageCreateWithMask' returns a Core Foundation Object With +1 retain count

QQ20151014-2@2x.png

调用CGImageCreateWithMask方法，会返回一个对象，并且它的的引用计数器会自动加1，当对象销毁时需要进行一次release。修改如下：

    CGImageRef newImageRef = CGImageCreateWithMask(grayImage, mask);
    UIImage *grayScaleImage = [UIImage imageWithCGImage:newImageRef
                                                  scale:1
                                            orientation:self.imageOrientation];
    CGImageRelease(newImageRef);