问题描述
我需要在objective-c 中使用一个布尔数组.我已经基本设置好了，但是编译器会在以下语句中抛出警告:
I need to utilize an array of booleans in objective-c. I've got it mostly set up, but the compiler throws a warning at the following statement:
[updated_users replaceObjectAtIndex:index withObject:YES];
这是，我敢肯定，因为 YES 根本就不是一个对象；这是一个原始的.无论如何，我需要这样做，并且非常感谢有关如何完成它的建议.
This is, I'm sure, because YES is simply not an object; it's a primitive. Regardless, I need to do this, and would greatly appreciate advice on how to accomplish it.
谢谢.
推荐答案
没错，就是这样:NS* 容器只能存储 Objective-C 对象，不能存储原始类型.
Yep, that's exactly what it is: the NS* containers can only store objective-C objects, not primitive types.
你应该能够通过将它包装在一个 NSNumber 中来完成你想要的:
You should be able to accomplish what you want by wrapping it up in an NSNumber:
[updated_users replaceObjectAtIndex:index withObject:[NSNumber numberWithBool:YES]]
或使用 @(YES) 将 BOOL 包装在 NSNumber
or by using @(YES) which wraps a BOOL in an NSNumber
[updated_users replaceObjectAtIndex:index withObject:@(YES)]]
然后就可以拉出boolValue了:
You can then pull out the boolValue:
BOOL mine = [[updated_users objectAtIndex:index] boolValue];
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