在Objective C中为弱属性创建自定义设置器的正确方法是什么? [英] What is the correct way to create a custom setter for a weak property in Objective C?

问题描述

如果我声明这样的属性:

If I declare a property like this:

@property(nonatomic,weak) Foo *someProperty;

然后我像这样声明一个自定义的setter:

and I then declare a custom setter like so:

- (void)setSomeProperty:(Foo *)someProp {
    _someProperty = someProp;
    //...more custom stuff
}

这有什么问题吗?也就是说，编译器应使用__weak修饰符自动合成_someProperty ivar，因此仅在上面的setter中进行分配就足够了，对吗?

is there anything wrong with this? That is, the compiler should automatically synthesize the _someProperty ivar with the __weak modifier, so just doing the assignment in the setter above should suffice, correct?

推荐答案

是的，仅此而已.当然，如果您想要除_someProperty之外的其他内容，则可以指定自定义iVar:

Yes, that's all there is to it. Of course you can specify a custom iVar if you'd like something other than _someProperty like:

@synthesize someProperty = someProperty_;

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