未调用[super method]时发出警告 [英] Give warning when [super method] is not called

问题描述

不使用ARC时，如果未在dealloc方法中调用[super dealloc]，则会收到警告.

When not using ARC, you get a warning when not calling [super dealloc] in your dealloc method.

我正在尝试用一个经常被子类化的类来实现类似的东西，以警告那些实现子类的人不要调用超类.

I'm trying to implement something similar with a class that gets subclassed often to warn the person implementing the subclass when they don't call super.

有什么想法吗?

推荐答案

最近的llvm版本添加了一个属性，该属性指示子类必须调用super:

Recent versions of llvm have added an attribute that indicates that subclasses must call super:

@interface Barn:NSObject
- (void)openDoor NS_REQUIRES_SUPER;
@end

@implementation Barn
- (void) openDoor
{
    ;
}
@end

@interface HorseBarn:Barn
@end
@implementation HorseBarn
- (void) openDoor
{
    ;
}
@end

编译以上内容会产生警告:

Compiling the above produces the warning:

Method possibly missing a [super openDoor] call

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