RAC +MVVM

https://blog.csdn.net/capf_sam/article/details/60960530

https://blog.csdn.net/capf_Sam/article/details/60960615

http://www.cocoachina.com/ios/20170612/19500.html

//响应式 <ReactiveObjc.h>
[[XXX rac_signalForSelector] subscribeNext:^(RACTuple * x){}];

[self.searchText.rac_textSignal subscribeNext: ^(id text){ NSLog(@"%@", text); }];

//KVO <NSObject + RACKVOWrapper.h>
[XXX rac_observerKeyPath: options: observer: block:];

MMTableViewModel

MaterialViewModel

//响应式 <ReactiveObjc.h>
[[XXX rac_signalForSelector] subscribeNext:^(RACTuple * x){}];

//KVO <NSObject + RACKVOWrapper.h>
[XXX rac_observerKeyPath: options: observer: block:];

//
[xxx rac_valuesForKeyPath: observer:];

//监听事件
[[btn rac_singalForControlEvents:] subscribeNext:]

//通知
[[NSNotificationCenter defaultCenter]rac_addObserverForName: object:] subscribeNext:];

//textfield 输入监听
[_textField.rac_textSignal subscribeNext:^(NSString *x){}];

1.RACSignal:信号类
创建信号：冷信号
RACSingal *signal = [RACSignal createSignal:^()]
订阅信号:热信号 RACSubcriber-发送信号
取消订阅 RACDispose

2，RACSubject:可创建信号，也可发送信号

RAC 宏

   // RAC:把一个对象的某个属性绑定一个信号,只要发出信号,就会把信号的内容给对象的属性赋值
    // 给label的text属性绑定了文本框改变的信号
    RAC(self.label, text) = self.textField.rac_textSignal;
//    [self.textField.rac_textSignal subscribeNext:^(id x) {
//        self.label.text = x;
//    }];