RAC初步使用

信号基本流程:

　　

    //1:创建信号
    RACSignal *signal = [RACSignal createSignal:^RACDisposable * _Nullable(id<RACSubscriber>  _Nonnull subscriber) {
        
        //subscriber 对象不是一个对象
        //3:发送信号
        [subscriber sendNext:@"Cooci"];
        
        //请求网络 失败 error
        NSError *error = [NSError errorWithDomain:NSURLErrorDomain code:10086 userInfo:@{@"key":@"10086错误"}];
        
        [subscriber sendError:error];
        //        [subscriber sendCompleted];
        
        //4.RACDisposable 销毁
        
        return [RACDisposable disposableWithBlock:^{
            
            NSLog(@"销毁了");
        }];
    }];
    
    
    //2:订阅信号
    [signal subscribeNext:^(id  _Nullable x) {
        
        NSLog(@"%@",x);
    }];
    
    //订阅错误信号
    
    [signal subscribeError:^(NSError * _Nullable error) {
        
        NSLog(@"%@",error);
    }];
    

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一: KVO

    [RACObserve(self, name) subscribeNext:^(id  _Nullable x) {
        
        NSLog(@"%@",x);
        
    }];

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二: 通知

    [[[NSNotificationCenter defaultCenter] rac_addObserverForName:UIKeyboardWillShowNotification object:nil] subscribeNext:^(NSNotification * _Nullable x) {
        
        NSLog(@"%@",x);
    }];

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三: 代理

    [[self rac_signalForSelector:@selector(textFieldDidEndEditing:) fromProtocol:@protocol(UITextFieldDelegate)] subscribeNext:^(RACTuple * _Nullable x) {
        
    }];

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四: target

    //Button
    [[self.button rac_signalForControlEvents:UIControlEventTouchUpInside] subscribeNext:^(__kindof UIControl * _Nullable x) {
        
    }];
    
    //UITextField
    [[self.textField rac_textSignal] subscribeNext:^(NSString * _Nullable x) {
        //x 为textField 中输入的text
    }];
    
    //UITapGestureRecognizer
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] init];
    self.label.userInteractionEnabled = YES;
    [self.label addGestureRecognizer:tap];
    
    [[tap rac_gestureSignal] subscribeNext:^(__kindof UIGestureRecognizer * _Nullable x) {
        
    }];

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五: timer

    [[RACSignal interval:1 onScheduler:[RACScheduler scheduler]] subscribeNext:^(NSDate * _Nullable x) {
        
        NSLog(@"%@",[NSThread currentThread]);
        
    }];

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六: 结构

    //数组
    NSArray *array = @[@"Kobe",@"laker",@"34"];
    
    [array.rac_sequence.signal subscribeNext:^(id  _Nullable x) {
        //子线程
        NSLog(@"%@",[NSThread currentThread]);
        NSLog(@"数组%@",x);
    }];
    
    /**
     2018-11-21 18:53:24.318270+0800 001---RAC初探[12854:18767540] <NSThread: 0x600002909200>{number = 3, name = (null)}
     2018-11-21 18:53:24.318529+0800 001---RAC初探[12854:18767540] 数组Kobe
     2018-11-21 18:53:24.319043+0800 001---RAC初探[12854:18767540] <NSThread: 0x600002909200>{number = 3, name = (null)}
     2018-11-21 18:53:24.319139+0800 001---RAC初探[12854:18767540] 数组laker
     2018-11-21 18:53:24.319340+0800 001---RAC初探[12854:18767540] <NSThread: 0x600002909200>{number = 3, name = (null)}
     2018-11-21 18:53:24.319398+0800  <NSThread: 0x600002909240>{number = 4, name = (null)}
     2018-11-21 18:53:24.319444+0800 001---RAC初探[12854:18767540] 数组34

     */
    
    NSDictionary *dict = @{@"name":@"James",@"age":@"18",@"gender":@"1"};
    
    [dict.rac_sequence.signal subscribeNext:^(id  _Nullable x) {
        
        NSLog(@"%@",[NSThread currentThread]);

        //元祖
        NSLog(@"字典%@",x);
        
        RACTwoTuple *tuple = (RACTwoTuple *)x;
        
        NSLog(@"key == %@ , value = %@",tuple[0],tuple[1]);
        
    }];
    
    /**
     2018-11-21 18:53:24.319584+0800  字典<RACTwoTuple: 0x600003e7f0a0> (
     name,
     James
     )
     2018-11-21 18:53:24.319666+0800  key == name , value = James
     2018-11-21 18:53:24.319899+0800  <NSThread: 0x600002909240>{number = 4, name = (null)}
     2018-11-21 18:53:24.320207+0800  字典<RACTwoTuple: 0x600003e7f070> (
     age,
     18
     )
     2018-11-21 18:53:24.320494+0800  key == age , value = 18
     2018-11-21 18:53:24.342978+0800  <NSThread: 0x600002909240>{number = 4, name = (null)}
     2018-11-21 18:53:24.343114+0800  字典<RACTwoTuple: 0x600003e68950> (
     gender,
     1
     )
     2018-11-21 18:53:24.343201+0800  key == gender , value = 1

     */

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