Objective-C是否保证接口成员数据的初始化? [英] Does Objective-C guarantee the initialization of interface member data?

问题描述

在这样的界面中:

@interface MyClass : NSObject
{
    bool PlainOldBool;
}

@end

... PlainOldBool是否会自动初始化为false，还是必须使用init方法来显式地做到这一点?

... does PlainOldBool get auto-initialized to false, or is it necessary to use an init method to do that explicitly?

推荐答案

是(除非您的false是不是0 ).默认的+alloc/+allocWithZone:方法将自动将所有ivars归零.

Yes (unless your false is not 0). The default +alloc/+allocWithZone: method will automatically zero out all ivars.

来自

• 它将所有其他实例变量初始化为零(或初始化为零的等效类型，例如nil，NULL和0.0).

• It initializes all other instance variables to zero (or to the equivalent type for zero, such as nil, NULL, and 0.0).

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