如何为NSDictionary添加布尔值？ [英] How can I add a boolean value to a NSDictionary?

问题描述

好吧，对于整数，我会使用 NSNumber 。但是，我想，YES和NO不是对象。据我所知。我只能将对象添加到 NSDictionary ，对吧？

Well, for integers I would use NSNumber. But YES and NO aren't objects, I guess. A.f.a.i.k. I can only add objects to an NSDictionary, right?

我找不到布尔值的任何包装类。有没有？

I couldn't find any wrapper class for booleans. Is there any?

推荐答案

你使用NSNumber。

它有init ...和number ...方法，它们采用布尔值，就像整数一样。等等。

It has init... and number... methods that take booleans, just as it does integers and so on.

来自 NSNumber类引用：

// Creates and returns an NSNumber object containing a 
// given value, treating it as a BOOL.
+ (NSNumber *)numberWithBool:(BOOL)value

和：

// Returns an NSNumber object initialized to contain a
// given value, treated as a BOOL.
- (id)initWithBool:(BOOL)value

和：

// Returns the receiver’s value as a BOOL.
- (BOOL)boolValue

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