向后滑动（回到左侧）返回上一个视图控制器

Question

我有2个视图控制器。 1： 登录页面（主视图控制器） 2： 注册页面 。假设我要从注册页面返回登录页面。 如何解决这个问题（使用导航控制器），我是swift和iOS的新手。 这是我在AppDelegate.swift中的代码。

 func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
    self.window?.backgroundColor = UIColor.whiteColor()
    self.window?.rootViewController = ViewController()
    self.window?.makeKeyAndVisible()

    return true
}

Answer 1

以编程方式嵌入导航控制器

 func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        // Override point for customization after application launch.

        UINavigationBar.appearance().backgroundColor = UIColor.whiteColor()

        let loginViewController: LoginViewController = LoginViewController(nibName: "LoginViewController", bundle: nil)
        let navController: UINavigationController = UINavigationController(rootViewController: loginViewController)
        window!.makeKeyAndVisible()
        window!.addSubview(navController.view!)

        return true
    }

使用Storyborad的嵌入式导航控制器

要启用导航控制器，您需要将您的loginViewController嵌入导航控制器中

打开情节提要->选择loginviewcontroller->编辑器（在Xcode菜单中）->嵌入->导航控制器

你可以看到结果看起来像

然后只需更新应用程序委托方法即可更改导航栏背景色

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        // Override point for customization after application launch.

        UINavigationBar.appearance().backgroundColor = UIColor.whiteColor()

        return true
    }

在LoginViewController控制器中，在viewDidLoad中添加向右滑动手势

override func viewDidLoad() {
        super.viewDidLoad()

        let swiperight: UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: #selector(LoginViewController.swiperight(_:)))
        swiperight.direction = .Right
        self.view!.addGestureRecognizer(swiperight)   
    }

    func swiperight(gestureRecognizer: UISwipeGestureRecognizer) {
            //Do what you want here
            //Load Signup view controller here

func swiperight(gestureRecognizer: UISwipeGestureRecognizer) {
        //Load Signup view controller here
        let signupHomeViewController: SignupHomeViewController = SignupHomeViewController(nibName: nil, bundle: nil)
        // and push it onto the 'navigation stack'
        self.navigationController?.pushViewController(signupHomeViewController, animated: true)

    }

    }

在SignupViewController控制器中，在viewDidLoad中添加向左滑动手势

override func viewDidLoad() {
        super.viewDidLoad()

        let swipeleft: UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: #selector(SignupViewController.swipeleft(_:)))
        swipeleft.direction = .Left
        self.view!.addGestureRecognizer(swipeleft) 
    }

 func swipeleft(gestureRecognizer: UISwipeGestureRecognizer) {
        //Do what you want here

        //Pop back to login view controller

    }

Answer 2

根据您的问题，我认为您已经创建了登录页面，注册页面，并且能够导航到注册页面。 由于您使用的是Navigation Controller，因此必须使用Push to ViewController。 您可以在左侧添加一个条形按钮，如下所示定义一个动作

var b = UIBarButtonItem( title: "Back To Login", style: .Plain, target: self, action: "backToLogin:" ) 

func backToLogin(sender: UIBarButtonItem) {
    self.navigationController?.popViewControllerAnimated(true)
 }

对于滑动功能：

var leftGesture = UISwipeGestureRecognizer(target: self, action: Selector("swipeToLogin:")) 
leftGesture.direction = .Left 
self.view.addGestureRecognizer(leftGesture)

func swipeToLogin(sender:UISwipeGestureRecognizer) {

self.navigationController?.popViewControllerAnimated(true)
}