ReactiveObjC (二) (RACSubscriber)

RACSubscriber 协议

RACSubscriber协议方法

@protocol RACSubscriber 

@required //必须实现的

1. - (void)sendNext:(nullable id)value; // 向订阅者(subscribers) 发送的值 (value)
2. - (void)sendError:(nullable NSError *)error;
3. - (void)sendCompleted;
4. - (void)didSubscribeWithDisposable:(RACCompoundDisposable *)disposable;

@end