swift代理传值

@H_502_0@视图之间传值有几种方式，今天暂时写一下代理传值，后更新

@H_502_0@开发平台： mac 10.10.2

@H_502_0@编译器：xcode6.3(6D532l)

@H_502_0@运行平台： xcode iphone 5s虚拟机

@H_502_0@

@H_502_0@所谓代理传值，就是通过delegate 来实现。设置两个视图.通过代理把第二张的视图的某值传给第一张视图

@H_502_0@

@H_502_0@UI如图。给第二章视图创建并绑定一个类

@H_502_0@

@H_502_0@在第二个视图类里声明一个协议

因为之前写的是一个测试，所以命名还是有点坑的
protocol channelProtocol{
    func onChangChannel(channelNumber:Int)
}

@H_502_0@在第二个视图类里添加协议的代理

var delegate:channelProtocol?

@H_502_0@

然后即可设置代理所传的值

delegate?.onChangChannel(rowOfTable)  //rowOfTable 之前声明的便变量

@H_502_0@第二个视图类的完整代码为

import UIKit
import AVFoundation
class ViewController: UIViewController,channelProtocol {

    @IBOutlet weak var label: UILabel!
    var audioPlayer : AVAudioPlayer!
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view,typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    override func prepareForSegue(segue: UIStoryboardSegue,sender: AnyObject?) {
        var ChanleC:secondView = segue.destinationViewController as! secondView
        ChanleC.delegate = self
     
    }
    func onChangChannel(channelNumber: Int) {
        label.text = "\(channelNumber)"
        
    }
}

下面开始写ViewControler 类 @H_502_0@加入刚刚在视图二绑定类声明的协议。实现方法

class ViewController: UIViewController,channelProtocol {
}

重写 prepareForSegue(segue: UIStoryboardSegue ,sender: AnyObject ?) 方法，这个也是代理传值的重点 @H_502_0@

overridce func prepareForSegue(segue: UIStoryboardSegue,sender: AnyObject?) {
        var ChanleC:secondView = segue.destinationViewController as! secondView
        ChanleC.delegate = self
     
    }

实现协议的方法

 func onChangChannel(channelNumber: Int) {
        label.text = "\(channelNumber)"
        
    }

@H_502_0@ViewController.swift完整代码是

import UIKit
class ViewController: UIViewController,sender: AnyObject?) {
        var ChanleC:secondView = segue.destinationViewController as! secondView
        ChanleC.delegate = self
     
    }
    func onChangChannel(channelNumber: Int) {
        label.text = "\(channelNumber)"
        
    }
}

完整项目代码托管到codinghttps://coding.net/goooooooofy/delegateGetValue.git @H_502_0@

@H_502_0@更多文章。访问个人网站 http://www.goofy.ga

swift代理传值

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