iOS开发RAC学习笔记(八)信号的调度器RACScheduler(线程)

github源代码地址

信号的调度器RACScheduler(多线程)

deliverOn

在上一篇我们讲到过RAC的副作用,deliverOn这个方法会将内容传递切换到指定线程,而副作用依旧会在指定线程内执行

    //创建信号
    -(void)createUpSignals{

    RACSignal * signal = [RACSignal createSignal:^RACDisposable *(id subscriber) {

        NSLog(@"sendTestSignal%@",[NSThread currentThread]);

        [subscriber sendNext:@1];

        [subscriber sendCompleted];

        return [RACDisposable disposableWithBlock:^{

                }];
        }];

    self.testSignal = signal;

    }

    //订阅信号
    //要想放在主线程执行只要将[RACScheduler scheduler]更换为[RACScheduler mainThreadScheduler]
    [[self.testSignal deliverOn:[RACScheduler scheduler]] subscribeNext:^(id x) {

        NSLog(@"receiveSignal%@",[NSThread currentThread]);

    }];

• 打印结果如下

    2016-09-02 09:48:59.697 Signal processing[1686:22894] sendTestSignal{number = 1, name = main}
    2016-09-02 09:48:59.697 Signal processing[1686:24680] receiveSignal{number = 3, name = (null)}
  

subscribeOn则会将传递内容和副作用一起放到指定线程执行

    [[[RACSignal createSignal:^RACDisposable *(id subscriber) {

        NSLog(@"sendSignal%@",[NSThread currentThread]);

        [subscriber sendNext:@1];

        return [RACDisposable disposableWithBlock:^{

                }];

    }] subscribeOn:[RACScheduler scheduler]] subscribeNext:^(id x) {

        NSLog(@"receiveSignal%@",[NSThread currentThread]);

    }];

• 打印结果如下

    2016-09-02 09:54:47.819 Signal processing[1778:54504] sendSignal{number = 2, name = (null)}
    2016-09-02 09:54:47.819 Signal processing[1778:54504] receiveSignal{number = 2, name = (null)}