swift闭包逆向传值
import UIKit
class BBViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
//创建一个按钮
let btn = UIButton(type: UIButtonType.Custom) as UIButton
btn.frame = CGRectMake(30, 100, self.view.frame.size.width-60, 40)
btn.setTitle("跳转到第二个控制器", forState: UIControlState.Normal)
btn.setTitleColor(UIColor.magentaColor(), forState: UIControlState.Normal)
btn.addTarget(self, action: "Click", forControlEvents: UIControlEvents.TouchUpInside)
self.view.addSubview(btn)
// Do any additional setup after loading the view.
}
func Click(){
let BBTC = BBTViewController()
BBTC.bbchange = { (title:String,coloer:UIColor) in
self.title = title
self.view.backgroundColor = coloer
}
self.navigationController?.pushViewController(BBTC, animated: true)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
第二个控制器是：
//
// BBTViewController.swift
// Swift_009
//
// Created by 周双建 on 15/12/7.
// Copyright © 2015年 周双建. All rights reserved.
//
import UIKit
class BBTViewController: UIViewController {
//定义一个闭包，带有两个参数
var bbchange :((title:String,coloer:UIColor)->Void)?
override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = UIColor.greenColor()
//创建一个按钮
let btn = UIButton(type: UIButtonType.Custom) as UIButton
btn.frame = CGRectMake(30, 100, self.view.frame.size.width-60, 40)
btn.setTitle("返回到第1个控制器", forState: UIControlState.Normal)
btn.setTitleColor(UIColor.magentaColor(), forState: UIControlState.Normal)
btn.addTarget(self, action: "bClick", forControlEvents: UIControlEvents.TouchUpInside)
self.view.addSubview(btn)
// Do any additional setup after loading the view.
}
func bClick(){
bbchange?(title:"成龙",coloer:UIColor.redColor())
self.navigationController?.popToRootViewControllerAnimated(true)
}
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.
}
*/
}
