### RAC

导入篇

很多新手刚开始使用CocoaPods导入RAC的时候不声明版本

platform :ios, ‘8.0’
target ‘Test’ do
  use_frameworks!

pod 'ReactiveCocoa'

end

其实上面那种非常是非常错的,除非你是用Swift来开发,如果你仅仅是只想要用OC来开发的话

platform :ios, ‘8.0’
target ‘Test’ do
  use_frameworks!

pod 'ReactiveCocoa', '~> 2.5'

end

最后建议在你的PCH文件中加入下面一段代码,这样省去了大量的导入操作了,毕竟经常能用得到

#import 

基础用法

啥也不多说，直接上代码

    // x-> self.tf
    [[self.tf rac_signalForControlEvents:UIControlEventEditingChanged] subscribeNext:^(id x) {
        NSLog(@"tf");
    }];
    
    // x-> self.tf.text
    [[self.tf rac_textSignal] subscribeNext:^(id x) {
        NSLog(@"%@",x);
    }];

    // 按钮点击监听
    [[self.btn rac_signalForControlEvents:UIControlEventTouchUpInside] subscribeNext:^(id x) {
        NSLog(@"btnDidClick");
    }];
    
    // 手势监听
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] init];
    [[tap rac_gestureSignal] subscribeNext:^(id x) {
        NSLog(@"tap");
    }];
    self.lb.userInteractionEnabled = YES;
    [self.lb addGestureRecognizer:tap];

    // 通知
    [[[NSNotificationCenter defaultCenter] rac_addObserverForName:@"123321" object:nil] subscribeNext:^(NSNotification *notify) {
        NSLog(@"%@",notify.object);
    }];
    [[NSNotificationCenter defaultCenter] postNotificationName:@"123321" object:@[@"1",@"2"]];

    
    // KVO
    UIScrollView *scr = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 300, 414, 736)];
    scr.contentSize = CGSizeMake(414, 1000);
    [self.view addSubview:scr];
    [RACObserve(scr, contentOffset) subscribeNext:^(id x) {
        
    }];

RACSignal

    RACSignal *signal = [RACSignal createSignal:^RACDisposable *(id subscriber) {
        [subscriber sendNext:@"asdasd"];
        [subscriber sendCompleted];
        return nil;
    }];
    
    [signal subscribeNext:^(id x) {
        NSLog(@"%@",x);
    } completed:^{
        NSLog(@"completed");
    }];