UINavigationController视图控制器切换（二）

概述上节地址: http://blog.csdn.net/lwjok2007/article/details/48346719 我们接着上节继续看返回指定ViewController 首先再创建两个UIViewController的子类 分别命名：ThirdViewController，ForthViewController 然后我们分别在SecondViewController 和 ThirdVie

上节地址:http://blog.csdn.net/lwjok2007/article/details/48346719

我们接着上节继续看返回指定VIEwController

首先再创建两个UIVIEwController的子类

分别命名：ThirdVIEwController，ForthVIEwController

然后我们分别在SecondVIEwController 和 ThirdVIEwController上添加button点击后跳转下一个页面

SecondVIEwController代码

import UIKitclass SecondVIEwController: UIVIEwController {    overrIDe func vIEwDIDLoad() {        super.vIEwDIDLoad()        // Do any additional setup after loading the vIEw.        self.title="第二个页面"                let btn=UIbutton(frame: CGRectMake(20,120,320,36))        btn.setTitle("d出第三个视图",forState: UIControlState.normal)        btn.setTitlecolor(UIcolor.blackcolor(),forState: UIControlState.normal)        btn.addTarget(self,action: "openAct",forControlEvents: UIControlEvents.touchDown)        self.vIEw.addSubvIEw(btn)            }    func openAct(){        let thirdVC=ThirdVIEwController()        self.navigationController?.pushVIEwController(thirdVC,animated: 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.    }    */}

ThirdVIEwController代码

import UIKitclass ThirdVIEwController: UIVIEwController {    overrIDe func vIEwDIDLoad() {        super.vIEwDIDLoad()        // Do any additional setup after loading the vIEw.        self.title="第三个页面"                let btn=UIbutton(frame: CGRectMake(20,36))        btn.setTitle("d出第四个视图",forControlEvents: UIControlEvents.touchDown)        self.vIEw.addSubvIEw(btn)    }    func openAct(){        let forthVC=ForthVIEwController()        self.navigationController?.pushVIEwController(forthVC,sender: AnyObject?) {        // Get the new vIEw controller using segue.destinationVIEwController.        // Pass the selected object to the new vIEw controller.    }    */}

我们执行代码就发现已经可以跳转了

接下来我们给FortthVIEwController 添加三个button。

        let btn=UIbutton(frame: CGRectMake(20,36))        btn.setTitle("回到第一个页面",forState: UIControlState.normal)        btn.tag=91        btn.addTarget(self,action: "openAct:",forControlEvents: UIControlEvents.touchDown)        self.vIEw.addSubvIEw(btn)                let btn2=UIbutton(frame: CGRectMake(20,170,36))        btn2.setTitle("回到第二个页面",forState: UIControlState.normal)        btn2.setTitlecolor(UIcolor.blackcolor(),forState: UIControlState.normal)        btn2.tag=92        btn2.addTarget(self,forControlEvents: UIControlEvents.touchDown)        self.vIEw.addSubvIEw(btn2)                let btn3=UIbutton(frame: CGRectMake(20,220,36))        btn3.setTitle("回到第三个页面",forState: UIControlState.normal)        btn3.setTitlecolor(UIcolor.blackcolor(),forState: UIControlState.normal)        btn3.tag=93        btn3.addTarget(self,forControlEvents: UIControlEvents.touchDown)        self.vIEw.addSubvIEw(btn3)

    func openAct(btn:UIbutton){        if btn.tag==91{            //回到首页            self.navigationController?.popToRootVIEwControllerAnimated(true)        }else if btn.tag==92{            //通过堆栈顺序获取要跳转的视图控制器            let vc=self.navigationController?.vIEwControllers[1] as! UIVIEwController            self.navigationController?.popToVIEwController(vc,animated: true)        }else if btn.tag==93{            //返回到上一个页面            self.navigationController?.popVIEwControllerAnimated(true)        }    }

我们点击按钮看下效果

这里要说明的一点是 跳转到指定VIEwController中我们首先调用了NavigationController的vIEwControllers[1]来获取了要跳转到的视图控制器。视图控制器跳转的时候是按照栈的方式来的.

我们例子中的首页是第一次出现在navigationController中的，所以栈底就是我们需要的首页，我们可以使用vIEwControllers[0] 来测试一下看能不能跳转首页

好了 基本简单的跳转都实现了。大家有问题欢迎加群讨论

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