Question

我正在尝试创建一个同时包含UITabBar（作为根视图控制器）和UINavigationBar的应用程序，这些应用程序始终存在于整个应用程序中。我的问题是我试图从navBar推送一个viewcontroller，但我不知道如何这样做。我知道我需要UINavigationBar成为我想要推出的视图控制器的NavigationController，但我无法弄清楚如何做到这一点。

在appDelegate中：

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

    let tabBar = window!.rootViewController
    let navBar = UINavigationBar(frame: CGRect(x: 0, y: 0, width: window!.frame.width, height: 64))

    let navBarItem = UINavigationItem(title: "Title")
    navBar.items = [navBarItem]

    tabBar?.view.addSubview(navBar)

    return true

}

在ViewController中尝试从

推送新VC

override func viewDidLoad() {
    super.viewDidLoad()

    let navBar = self.parentViewController?.view.subviews[2] as! UINavigationBar
    let navBarItem = navBar.items[0] as! UINavigationItem

    navBarItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .Add, target: self, action: "pushCreateVC:")
}

func pushCreateVC(sender: UIBarButtonItem) {

    println("push")

    let navBar = self.parentViewController?.view.subviews[2] as! UINavigationBar
    let navBarItem = navBar.items[0] as! UINavigationItem //left over code to reference the navBar from this method

    let createVC = CreateViewController()
    self.navigationController?.pushViewController(createVC, animated: true) // This is where I want the navBar to push createVC so it still have the navBar at the top with a back button

}

Answer 1

如果你想做你在问题中提到的内容，你应该在其中创建一个带有UINavgationController的UITabbarController

//        First you need to create a nav controller with viewcontroller in it

var vc = UIViewController()
var navController = UINavigationController(rootViewController: vc)

var tbController = UITabBarController()

//you can add more tab with more navControllers or viewcontrollers
tbController.setViewControllers([navController], animated: true)

//present the tbController as the main viewcontroller

使用tabBar

1 个答案: