//委托
import UIKit
protocol ValuePassDelegaete:NSObjectProtocol{
func passValue(value:String)
}
class ViewController2: UIViewController {
var delegate:ValuePassDelegaete?
@IBOutlet weak var valuelab: UILabel!
@IBAction func Back(sender: UIButton) {
self.delegate!.passValue("123")
}
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
/*
// MARK: - Navigation
// In a storyboard-based application,you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue,sender: AnyObject?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}
//代理
import UIKit
class ViewController1: UIViewController,ValuePassDelegaete {
@IBOutlet weak var valueLab: UILabel!
@IBAction func Click(sender: UIButton) {
let view2 = ViewController2(nibName:"ViewController2",bundle:nil)
view2.delegate = self
self.navigationController?.pushViewController(view2,animated: true)
}
func passValue(value: String) {
self.valueLab.text = value
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
*/
}
原文链接：https://www.f2er.com/swift/327221.html