cocoa - 核心基础对象 - 潜在泄漏

Question

我有以下内容(改编自 Apple Low Level File Management - Resolving Aliases)

NSString *resolvedPath = nil;
...
resolvedPath = (NSString*)CFURLCopyFileSystemPath(resolvedUrl, kCFURLPOSIXPathStyle);
...
return resolvedPath;

构建和分析会生成以下警告:-

194:3 Potential leak (when using garbage collection) of an object allocated on line 187 and stored into 'resolvedPath'

详细说明:-

187:32 Call to function 'CFURLCopyFileSystemPath' returns a Core Foundation object with a +1 retain count (owning reference).  Core Foundation objects are not automatically garbage collected

194:3 Object returned to caller as an owning reference (single retain count transferred to caller)

194:3 Object allocated on line 187 and stored into 'resolvedPath' and returned from method 'getTarget:' is potentially leaked when using garbage collection.  Callers of this method do not expect a returned object with a +1 retain count since they expect the object to be managed by the garbage collector

我有内存泄漏吗？

如果是这样我该如何解决？

如果不是，我该如何防止警告？

Answer 1

它只是提醒您，创建的分配给 resolvedPath 的对象返回时，保留计数为 1，因此除非您的方法以 开头new alloc 或 contains copy，调用者无法知道它正在处理一个retained对象，因此它将永远不会被释放。

要修复此问题，请将方法名称从 getTarget 更改为 newTarget。