向后滑动(回到左侧)可返回上一个视图控制器 [英] Go back to previous view controller with help of swipe back (to the left)

问题描述

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到登录页面.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.

I have 2 view controllers. 1: Login page(Main View Controller) 2:Sign Up page.Lets assume that I want to go back from Sign Up page to Login page . How to solve this problem(with Navigation Controller), I am new in swift and iOS . Here is my code in AppDelegate.swift.

 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
}

推荐答案

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loginViewController嵌入导航控制器中

To enable navigation controller you need to embed-in your loginViewController in Navigation controller

打开Storyboard->选择loginviewcontroller->编辑器(在Xcode菜单中)->嵌入->导航控制器

Open Storyboard --> select loginviewcontroller --> Editor (in Xcode menu) --> Embed in --> Navigation controller

您可以看到结果类似

然后只需更新应用程序委托方法即可更改导航栏背景颜色

then just update app delegate method to change the navigation bar background color

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

In LoginViewController controller add Right swipe gesture in viewDidLoad

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

In SignupViewController controller add Left swipe gesture in viewDidLoad

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

    }

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