如何在swift中将一个页面导航到另一个页面？

Question

我是Swift的新手。我正在将数据传递到一个视图到另一个视图。 我正在使用下面的代码

@IBAction func loginAction(sender: AnyObject) {
let nextViewController = NextViewController(nibName: "NextViewController", bundle: nil) 
self.navigationController?.pushViewController(nextViewController, animated: true) 
}

但它不会导航第二页。

请帮帮我。

先谢谢。

Answer 1

如果您没有使用StoryBoard，可以使用以下代码： 的 AppDelegate.swift

import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?
    var userInputViewContrller: UserInputViewController = UserInputViewController()
    var navigationViewController: UINavigationController = UINavigationController()


    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

        self.window = UIWindow.init(frame: UIScreen.mainScreen().bounds)
        self.window?.backgroundColor = UIColor.whiteColor()
        self.navigationViewController = UINavigationController.init(rootViewController: userInputViewContrller)
        self.window?.rootViewController = self.navigationViewController
        self.window?.makeKeyAndVisible()

        return true
    }

现在你已经为你的naviagationViewController设置了rootViewController作为你的naviagationViewController，它是用页面变量初始化的＆＃34; userInputViewContrller＆＃34;

import UIKit

class UserInputViewController: UIViewController {

    override func viewWillAppear(animated: Bool) {

        let viewFrame = CGRect(x: 1, y: 30, width: 373, height: 635)
        let view: UIView = UIView(frame: viewFrame)
        self.view.addSubview(view)

        let clickMeButton:UIButton = UIButton()
        let nextButtonFrame = CGRect(x: 200, y: 275, width: 150, height: 30)
        nextButton = UIButton(frame: nextButtonFrame)
        clickMeButton.setTitle("Click here", forState: UIControlState.Normal)
        clickMeButton.addTarget(self, action: "clickMeTapped:", forControlEvents: UIControlEvents.TouchUpInside)
        view.addSubview(clickMeButton)
    }

    func clickMeTapped(sender: UIButton){
        let itemViewController = ItemViewController()
        self.navigationController?.pushViewController(itemViewController, animated: true)
    }
}

点击＆＃34;点击此处＆＃34;在UserInputViewController中，您将被导航到下一个屏幕itemViewController。

import UIKit

class ItemViewController: UIViewController {
    override func viewWillAppear(animated: Bool) {
        //View

        let viewFrame = CGRect(x: 1, y: 30, width: 373, height: 635)
        let view: UIView = UIView(frame: viewFrame)
        self.view.addSubview(view)

        //Header Label
        let headerLabelFrame = CGRect(x: 25, y: 50, width: 325, height: 30)
        var headerLabel:UILabel = UILabel()
        headerLabel = UILabel(frame: headerLabelFrame)
        headerLabel.text = "Hello I'm in itemViewVireControllr"
        view.addSubview(headerLabel)
  }
}