在Objective-C中只写属性 [英] Write only property in Objective-C

问题描述

我坚持使用objective-c属性。我需要的是为变量分配一个只写属性，与readonly完全相反，即变量可以有 setMethod ，但它不应该有 getMethod 。我不知道怎么做。一些代码片段的答案很受欢迎。

I am stuck with objective-c properties. What I need is to assign a write-only property for a variable, exactly the opposite of readonly, i.e the variable can have setMethod, but it should not have getMethod. I don't know how to do it. answers with some code snippets are appreciated.

推荐答案

你可以这样做：

@interface MyClass {
@private
int _var;
}

- (void)setVar:(int)newVar;
@end

@implementation MyClass
- (void)setVar:(int)newVar {
_var = newVar;
}
@end

现在你可以访问变量 var 就像一个只写的属性：

Now you can access the variable var like a property that is write-only:

@implementation SomeOtherClass
...
MyClass c = [[MyClass alloc] init];
c.var = 3;
...
@end

如果你试试看假货属性编译器会警告你。

And if you try to read the fake property the compiler will warning you.

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