Objective-C内存管理:发布时崩溃 [英] Objective-C Memory Management: crash on release

问题描述

我是Objective-C的新手，似乎无法正确理解内存管理代码.我有以下代码:

I'm new to Objective-C and can't seem to get the memory management code right. I have the following code:

Media* myMedia = [self.myMediaManager getNextMedia];

self.navigationItem.title = [self.myMediaManager getCategory];
[self.btnImage setImage:myMedia.imageFile forState: UIControlStateNormal];
[self.lblImage setText:myMedia.imageLabel];

//[myMedia release];

如果我取消注释以上行，我的应用程序将崩溃.实例化myMedia时是否需要做一些特别的事情?

My app crashes if I uncomment the above line. Do I need to do something special when I instantiate myMedia?

如果应该释放myMediaManager，它将在何时发布.这是我的getNextMedia代码:

If myMediaManager is supposed to release it, when would it do that. Here is my code for getNextMedia:

- (Media*) getNextMedia {

    DLog(@"Start");

    Media* nextMedia = [[Media alloc] init];

    [self setNextMediaIndex];

    if (self.mediaIndex > -1)
    {
        nextMedia = [mediaArray objectAtIndex: self.mediaIndex];
    }

    return nextMedia;
}

我修复了崩溃的问题(我释放了一个我不拥有的对象).我仍然看到泄漏，而且似乎找不到问题所在.

I fixed the crashing issue (I was releasing an object I didn't own). I still see leaks and can't seem to find what the issue is.

推荐答案

只有您自己拥有的对象才能被释放.

如果先new，alloc，copy，mutableCopy或retain，则可以release个对象.

Only objects that you own can be released.

You can release objects if you new, alloc, copy, mutableCopy or retain them first.

由于[self.myMediaManager getNextMedia];中没有分配/复制/保留功能，因此无法释放它.

Since there is no alloc/copy/retain in [self.myMediaManager getNextMedia]; you can't release it.

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