RAC的combineLatestWith、combineLat

组合操作——combineLatestWith、combineLatest：

// 组合操作——combineLatestWith、combineLatest：按照信号执行时间顺序依次进行叠加，列出全部的元素。形成元组一一对应。
// 信号一方先结束另一方也跟着结束。
RACSignal *signalA = [RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
  [subscriber sendNext:@1];
  [subscriber sendNext:@2];
  [subscriber sendNext:@3];
  [subscriber sendNext:@4];
  [subscriber sendNext:@5];
// [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 combineLatestWith:signalB];
//    RACSignal *signalC = [RACSignal combineLatest:@[signalA, signalB]];
RACSignal *signalC = [RACSignal combineLatest:RACTuplePack(signalA, signalB)];
[[signalC subscribeNext:^(id x) {
  NSLog(@"subscribeNext:%@",x);
}] dispose];

2021-04-15 11:06:31.791936+0800 xxxxxx[3465:1037447] signalA完成

2021-04-15 11:06:31.792967+0800 xxxxxx[3465:1037447] subscribeNext:<RACTuple: 0x170011610> (

5,

11

)

2021-04-15 11:06:31.793053+0800 xxxxxx[3465:1037447] subscribeNext:<RACTuple: 0x170011620> (

5,

22

)

2021-04-15 11:06:31.793098+0800 xxxxxx[3465:1037447] subscribeNext:<RACTuple: 0x1700116a0> (

5,

44

)

2021-04-15 11:06:31.793137+0800 xxxxxx[3465:1037447] signalB完成