iOS Runtime 动态添加属性不能添加intrinsic类型

- (void)setIsThreeDimensionalMap:(BOOL)isThreeDimensionalMap{    objc_setAssociatedObject(self, @"isThreeDimensionalMap", isThreeDimensionalMap, OBJC_ASSOCIATION_COPY_NONATOMIC);}

报错：
- Implicit conversion of ‘BOOL’ (aka ‘bool’) to ‘id’ is disallowed with ARC

就是不能动态添加本身的类型，只能添加对象

于是我把对象包装到NSNumber中去

[NSNumber numberWithBool:YES]; 

添加一个NSNumber 对象…

- (void)setIsThreeDimensionalMap:(NSNumber *)isThreeDimensionalMap{    objc_setAssociatedObject(self, @"isThreeDimensionalMap", isThreeDimensionalMap, OBJC_ASSOCIATION_COPY_NONATOMIC);}

就不报错了！