Objective-C的：如何正确地使用内存管理为异步方法 [英] Objective-C: How to use memory managment properly for asynchronous methods

问题描述

我需要调用启动某些异步code的方法

I need to call a method that starts some asynchronous code

MyClass* myClass = [[MyClass alloc] init];
[myClass startAsynchronousCode];

现在我不能简单地释放它，因为这将导致一个错误，因为code仍在运行：

Now I cant simply release it as this would cause an error since the code is still running:

[myClass release];  // causes an error

什么是处理与内存的最佳方式？

What is the best way to deal with the memory?

推荐答案

您可以有 - [MyClass的startAsynchronous code]调用回调：

You could have -[MyClass startAsynchronousCode] invoke a callback:

typedef void(*DoneCallback)(void *);

-(void) startAsynchronousCode {
  // Lots of stuff
  if (finishedCallback) {
    finishedCallback(self);
  }
}

然后实例这样的MyClass的：

and then instantiate a MyClass like this:

MyClass *myClass = [[MyClass alloc] initWith: myCallback];

myCallBack函数可能是这样的：

myCallback might look like this:

void myCallback(void *userInfo) {
  MyClass *thing = (MyClass *)userInfo;
  // Do stuff
  [thing release];
}

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