ReactiveObjC（OC版ReactiveCocoa）的安装与使用

https://github.com/ReactiveCocoa/ReactiveObjC/blob/master/README.md#when-to-use-reactiveobjc

http://blog.csdn.net/mazy_ma/article/details/68508090

https://www.cnblogs.com/qq9070/p/6795502.html

一、使用pod导入第三方库ReactiveCocoa

　　podfile文件内容如下： 

platform :ios,'8.0'
target 'MyReactiveCocoa' do
use_frameworks!
pod 'ReactiveObjC','~> 3.1.0'
end

 

二、基础用法

      1、模型到UI

RAC(_lblName,text) = RACObserve(self.person, name);

　

　2、UI到模型

[RACObserve(self.person, name) subscribeNext:^(NSString *x){
        @strongify(self)
        self.lblName.text = x;
        [self.btnName setTitle:x forState:UIControlStateNormal];
    }];

 [[RACObserve(self.person, name) filter:^BOOL(NSString *value) {
        return ![value hasPrefix:@"j"];
    }] subscribeNext:^(id  _Nullable x) {
         @strongify(self)
        self.lblName.text = [x stringByAppendingString:@"j"];;
    }];

     

　　3、模型到模型

 [[RACSignal combineLatest:@[RACObserve(self, name),RACObserve(self.person, name)]] subscribeNext:^(RACTuple * _Nullable x) {
        @strongify(self)
        self.isSame = [x.first isEqualToString:x.second];
        NSLog(@"%@",x.first);
        NSLog(@"%@",x[1]);
    }];

　　

 　  4、UI到UI

 RAC(self.btnName,enabled) = [RACSignal combineLatest:@[self.tfdName.rac_textSignal,self.tfdPwd.rac_textSignal,self.tfdConfirmPwd.rac_textSignal] reduce:^(NSString *tfdname,NSString *pwd,NSString *confirmPwd){
        NSLog(@"name:%@",tfdname);
        NSLog(@"pwd:%@",pwd);
        NSLog(@"confirmPwd:%@",confirmPwd);
        return @([tfdname length] > 0 && [pwd length] > 0 && [pwd isEqualToString:confirmPwd]);
    }];

 

　　5、绑定点击事件

　　　　方法一

 [[self.btnName rac_signalForControlEvents:UIControlEventTouchUpInside] subscribeNext:^(UIButton *sender){
        // touch up inside
    }];

　　　　方法二： 当btnName上已经绑定signal时会报错 此时使用第二种方法

self.btnName.rac_command = [[RACCommand alloc]initWithSignalBlock:^(id input) {
        NSLog(@"touch action");
        //input-btnName
        return [RACSignal empty];
    }];

或者：

    RACCommand *commandLogin = [[RACCommand alloc]initWithSignalBlock:^(id input) {
        NSLog(@"touch action");
        return [RACSignal empty];
    }];
    [commandLogin.executionSignals subscribeNext:^(RACSignal *x) {
        [x subscribeCompleted:^{
             NSLog(@"after touch action");
        }];
    }];
    self.btnName.rac_command = commandLogin;