为什么@(NO)不是NSNumber类 [英] Why @(NO) isn't kind of class NSNumber

问题描述

我的行为很怪异，这似乎是由于iOS中的一些实习生造成的.

I have a weird behavior which seem due to some intern cooking in iOS.

当我这样做时:

id data1 = @(NO);
if ([data1 isKindOfClass:[NSNumber class]]) {
    // doesn't come here.
}

但是使用 @(YES)可以完美地工作.

But with @(YES) it work perfectly.

首先，我想了解原因.其次，我想知道您将如何处理我的案件?(因为id也可以是文本).

First I would like to understand why. Second, I would like to know what you would do in my case ? (Since id can be also text).

答案:

实际上，@(NO)是NSNumber类，我的问题是由于其他错误.

Indeed, @(NO) is a kind a class NSNumber, and my problem was due to some other mistake.

推荐答案

对于表示 NSNumber 的实例，只需使用 @NO 和 @YES NO 和 YES .

Just use @NO and @YES for NSNumber instances that represent NO and YES.

[@(NO)类] 和 [@(YES)类] 都提供 __ NSCFBoolean .

并且 [@ NO类] 和 [@ YES类] 也会提供 __ NSCFBoolean .

在所有四种情况下，对 isKindOfClass:[NSNumber class] 的检查均返回true.

And in all four cases a check against isKindOfClass:[NSNumber class] returned true.

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