RAC的冷信号 -> 热信号
冷信号 -> 热信号：
// 冷信号 -> 热信号
RACSignal *signalA = [RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
[subscriber sendNext:@1];
[subscriber sendNext:@11];
[subscriber sendNext:@111];
[subscriber sendNext:@1111];
[subscriber sendCompleted];
return [RACDisposable disposableWithBlock:^{
NSLog(@"signalA1完成");
}];
}];
RACSignal *signalB = [[signalA map:^id(id value) {
return [[RACSignal return:value] delay:1];
}] concat];
RACSubject *speaker = [RACSubject subject];
// 冷信号转变成一个热信号
[signalB subscribe:speaker];
[speaker subscribeNext:^(id x) {
NSLog(@"1:%@",x);
}];
[speaker subscribeNext:^(id x) {
NSLog(@"2:%@",x);
}];
[speaker subscribeNext:^(id x) {
NSLog(@"3:%@",x);
}];
[speaker sendNext:@22];
[speaker sendNext:@222];
// 结果：
2021-04-21 20:13:59.725736+0800 XXXXXX[2785:462147] 1:22
2021-04-21 20:13:59.725775+0800 XXXXXX[2785:462147] 2:22
2021-04-21 20:13:59.725786+0800 XXXXXX[2785:462147] 3:22
2021-04-21 20:13:59.725797+0800 XXXXXX[2785:462147] 1:222
2021-04-21 20:13:59.725806+0800 XXXXXX[2785:462147] 2:222
2021-04-21 20:13:59.725814+0800 XXXXXX[2785:462147] 3:222
2021-04-21 20:14:00.743432+0800 XXXXXX[2785:462147] 1:1
2021-04-21 20:14:00.743628+0800 XXXXXX[2785:462147] 2:1
2021-04-21 20:14:00.743745+0800 XXXXXX[2785:462147] 3:1
2021-04-21 20:14:01.840378+0800 XXXXXX[2785:462147] 1:11
2021-04-21 20:14:01.840572+0800 XXXXXX[2785:462147] 2:11
2021-04-21 20:14:01.840685+0800 XXXXXX[2785:462147] 3:11
2021-04-21 20:14:02.842987+0800 XXXXXX[2785:462147] 1:111
2021-04-21 20:14:02.843184+0800 XXXXXX[2785:462147] 2:111
2021-04-21 20:14:02.843298+0800 XXXXXX[2785:462147] 3:111
2021-04-21 20:14:03.885937+0800 XXXXXX[2785:462147] 1:1111
2021-04-21 20:14:03.886134+0800 XXXXXX[2785:462147] 2:1111
2021-04-21 20:14:03.886256+0800 XXXXXX[2785:462147] 3:1111
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