swift （协议与通知）

定义一个protocol

protocol myDelegate {
    
    func protocol01(str:String) ->Void
}

    var testdelegate:myDelegate?

    self.testdelegate?.protocol01(str: "这个是协议方法")

协议回调处理

pvc.testdelegate = self;

func protocol01(str: String) {
        print("协议：",str)
        
    }

通知

添加通知

NotificationCenter.default.addObserver(self, selector:#selector(test1(notification:)), name: NSNotification.Name("testnotification"), object: nil)
//接收通知
 @objc func test1(notification:NSNotification) -> Void {
        let userinfo = notification.userInfo as![String:AnyObject]
        
        print("这是个通知:",userinfo["通知"] as!String)
    }
    //释放移除通知
 deinit {
        
        NotificationCenter.default.removeObserver(self)
    }

发送通知

NotificationCenter.default.post(name: NSNotification.Name("testnotification"), object: self, userInfo:["通知":"通知传值"])