RAC的zipWith、zip操作

组合操作——zipWith、zip：

// 组合操作——zipWith、zip：按照信号执行时间顺序依次进行叠加，列出全部的元素。拉链式结构、元组一一对应。
// 信号一方先结束另一方也跟着结束。
// 注意信号A和信号B的执行顺序
RACSignal *signalA = [RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
  [subscriber sendNext:@1];
  [subscriber sendNext:@2];
  [subscriber sendNext:@4];
//    [subscriber sendError:[NSError new]];
  [subscriber sendCompleted];
  return [RACDisposable disposableWithBlock:^{
    NSLog(@"signalA完成");
  }];
}];

RACSignal *signalB = [RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
  [subscriber sendNext:@11];
  [subscriber sendNext:@22];
  // [subscriber sendError:[NSError new]];
  [subscriber sendNext:@44];
  [subscriber sendCompleted];
  return [RACDisposable disposableWithBlock:^{
    NSLog(@"signalB完成");
  }];
}];

//    RACSignal *signalC = [signalA zipWith:signalB];
//    RACSignal *signalC = [RACSignal zip:@[signalA, signalB]];
RACSignal *signalC = [RACSignal zip:RACTuplePack(signalA, signalB)];
[[signalC subscribeNext:^(id x) {
  NSLog(@"subscribeNext:%@",x);
}] dispose];

2021-04-15 11:03:34.588688+0800 XXXXXX[3460:1036744] signalA完成

2021-04-15 11:03:34.589752+0800 XXXXXX[3460:1036744] subscribeNext:<RACTuple: 0x170009fa0> (

1,

11

)

2021-04-15 11:03:34.589856+0800 XXXXXX[3460:1036744] subscribeNext:<RACTuple: 0x170009fe0> (

2,

22

)

2021-04-15 11:03:34.589902+0800 XXXXXX[3460:1036744] subscribeNext:<RACTuple: 0x17000a010> (

4,

44

)

2021-04-15 11:03:34.589936+0800 XXXXXX[3460:1036744] signalB完成