iPhone内存漏水？ [英] iPhone memory leaking?

问题描述

非常快速的问题让我开始了INSANE。我想知道是否有人能告诉我为什么这条线路正在泄漏？

Really quick question that is driving me INSANE. I was wondering if someone could tell me why this line is leaking?

NSString *post = [NSString stringWithFormat:@"<someXML><tagWithVar=%@></tagWithVar></someXML>",var];
post = [NSString stringWithFormat:@"xmlValue=%@",(NSString *)CFURLCreateStringByAddingPercentEscapes(
                                                                               NULL,
                                                                               (CFStringRef)post,
                                                                               NULL,
                                                                               (CFStringRef)@"!*'();:@&=+$,/?%#[]",
                                                                               kCFStringEncodingUTF8 )];

我只是将字符串编码为URL格式。根据我的理解，stringWithFormat：应该返回一个自动释放的对象。显然事实并非如此。它有效，但泄漏。任何想法？

I am just encoding a string into a URL format. From my understanding, stringWithFormat: should return an autoreleased object. Apparently that is not the case. It works, but leaks. Any ideas??

推荐答案

您正在使用方法 CFURLCreateStringByAddingPercentEscapes 。如果Core Foundation函数的名称中包含Create，则表示您拥有返回的对象。换句话说，您需要释放 CFURLCreateStringByAddingPercentEscapes 返回的 CFStringRef 。

You are using the method CFURLCreateStringByAddingPercentEscapes. If a Core Foundation function has "Create" in its name, it means that you own the returned object. In other words, you'll need to release the CFStringRef returned by CFURLCreateStringByAddingPercentEscapes.

NSString *post = [NSString stringWithFormat:@"...", var];
CFStringRef stringRef = CFURLCreateStringByAddingPercentEscapes(...);
post = [NSString stringWithFormat:@"xmlValue=%@",(NSString *)stringRef];
CFRelease(stringRef);

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