swift的protocol

import Foundation

protocol ChangeTextDelegate{

func changeLableValue(newString:String)

}

class OtherVC: UIViewController {

var delegate : ChangeTextDelegate?

override func viewDidLoad() {

super.viewDidLoad()

// Do any additional setup after loading the view.

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

@IBAction func otherButtonClick(sender: UIButton) {

delegate!.changeLableValue("这是第二个")

self.dismissViewControllerAnimated(true) { () -> Void in

}

class ViewController: UIViewController,ChangeTextDelegate {

func changeLableValue(newString: String) {

lable.text=newString

@IBOutlet weak var lable: UILabel!

@IBOutlet weak var btnClick: UIButton!

@IBAction func buttonClick(sender: UIButton) {

let storyBoard = UIStoryboard(name: "Main",bundle: nil)

let otherVc :OtherVC = storyBoard.instantiateViewControllerWithIdentifier("OtherVC") as! OtherVC

otherVc.delegate=self

self.presentViewController(otherVc,animated: true) { () -> Void in

}

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!