RAC 之skip

skip:跳跃前面几个信号值

RACSubject *subject = [RACSubject subject];

    // 跳跃几个值

    [[subject skip:2] subscribeNext:^(id  _Nullable x) {

        NSLog(@"%@",x);

    }];

    [subject sendNext:@"11111"];

    [subject sendNext:@"11211"];

    [subject sendNext:@"11311"];

    [subject sendNext:@"11411"];

打印： 11311 + 11411