轉換的類型有:

RACSiganl 變為 Signal

• 信號的第一種創建方式
  <pre><code> let producer = SignalProducer<Any, NoError>.init { (observe, disposable) in
  observe.send(value: "hello")
  }

    let subscriber = Observer<Any, NoError>(value: { print("輸出 \($0)") })
  
    producer.start(subscriber)
  

</pre></code>

• 信號的第二種創建方式
  <pre><code>let (signalA, observerA) = Signal<String, NoError>.pipe()
  signalA.observeValues { (value) in
  print("輸出 (value)")
  }
  observerA.send(value: "signalA")
  </pre></code>

• 兩個信號都發送消息的時候才會調用
  <pre><code>let (signalA, observerA) = Signal<String, NoError>.pipe()
  signalA.observeValues { (value) in
  print("輸出 (value)")
  }
  observerA.send(value: "signalA")
  let (signalB, observerB) = Signal<String, NoError>.pipe()
  Signal.combineLatest(signalA,signalB).observeValues { (value) in
  print( "收到的值(value.0) + (value.1)")
  }
  observerA.send(value: "我是信號1")
  observerA.sendCompleted()
  observerB.send(value: "我是信號2")
  observerB.sendCompleted()
  </pre></code>

• 實現代理
  <pre><code>let redV = RedView()
  redV.frame = CGRect(x: 100, y: 100, width: 100, height: 100)
  view.addSubview(redV)
  redV.signal.observeValues { (value) in
  print("接收到 (value)")
  }
  </pre></code>

RedView中代碼

<pre><code>var btn : UIButton?
let (signal,obser) = Signal<Any,NoError>.pipe()

override init(frame: CGRect) {
    super.init(frame: frame)
    backgroundColor = UIColor.red
    btn = UIButton(type: .custom)
    btn?.frame = CGRect(x: 0, y: 0, width: 50, height: 50)
    btn?.setTitle("哈哈", for: .normal)
    addSubview(btn!)
    
    btn!.reactive.controlEvents(.touchUpInside).observeValues({ (_) in
        print("redView點擊")
        self.obser.send(value: "redView代理")
        self.obser.sendCompleted()

    })

</pre></code>

• 其他
  <pre><code>
  //nameTf 跟 pwdTf同時有值得時候才會調用
  Signal.combineLatest(nameTf.reactive.continuousTextValues, pwdTf.reactive.continuousTextValues).observeValues { (name,pwd) in
  print("(name!) ++++ (pwd!)")
  }
  //button點擊事件
  btn.reactive.controlEvents(.touchUpInside).observeValues { (_ button) in
  print(btn.tag)
  }
  //輸入框字符大于6 按鈕才可以點擊 第一種寫法
  Signal.combineLatest(nameTf.reactive.continuousTextValues,pwdTf.reactive.continuousTextValues).map { (name, password) -> Bool in
  return ((name?.characters.count)! >= 6 && (password?.characters.count)! >= 6)
  }.observeValues { (value) in
  btn.isEnabled = value
  }
  //輸入框字符大于6 按鈕才可以點擊 第二種寫法
  btn.reactive.isEnabled <~ Signal.combineLatest(nameTf.reactive.continuousTextValues,pwdTf.reactive.continuousTextValues).map { $0?.characters.count ?? 0 >= 6 && $1?.characters.count ?? 0 >= 6
  }
  //線程
  QueueScheduler.main.schedule(after: Date.init(timeIntervalSinceNow: 0.5)) {
  print("0.5秒后調用")
  }
  QueueScheduler.init().schedule(after: Date.init(timeIntervalSinceNow: 0.5)) {
  print("子線程調用")
  }
  //接收通知
  NotificationCenter.default.reactive.notifications(forName: Notification.Name(rawValue: "redView")).observeValues({ (noti) in
  print(noti.object ?? "通知")
  })
  </pre></code>