swift - 以编程方式创建导航 View

因此，我试图创建一个应用程序，但我试图避免使用情节提要。因此，仅将swift文件与XIB文件一起使用。

在此之前，我曾与导航控制器一起工作过一点，但我想还不够。到目前为止，我有这个：

在AppDelegate中，我有：

let homeVC = HomeViewController()
let rootVC = UINavigationController(rootViewController: homeVC)

window!.rootViewController = rootVC
window!.makeKeyAndVisible()

我的视图当前完全是空的，但是具有创建新XIB文件时附带的基本“视图”屏幕。我已将其大小设置为freeform，其他所有东西，例如顶部栏，状态栏均为Inferred。

在我的HomeViewController.swift中，我有：

override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.
    let nib = UINib(nibName: "HomeView", bundle: nil)
    let objects = nib.instantiateWithOwner(self, options: nil)
    self.view = objects[0] as! UIView;

    print(self.navigationController)

    // customize navigation bar
    let settingsImage = UIImage(named: "settingsWheelBlack.png")
    let settingsNavItem = UIBarButtonItem(image: settingsImage, style: UIBarButtonItemStyle.Plain, target: nil, action: Selector("selector"))
    let addStuffItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Add, target: nil, action: Selector("selector"))

    self.navigationController?.navigationItem.title = "Home"
    self.navigationController?.navigationItem.leftBarButtonItem = settingsNavItem
    self.navigationController?.navigationItem.rightBarButtonItem = addStuffItem

    print(self.navigationController?.navigationBar)
    print(self.navigationController?.navigationItem.title)
}

但是，当我运行该应用程序时，导航栏没有显示。这是我目前尝试过的其他方法：


将导航栏控件添加到我的XIB并将IB插座连接到它。还将IB插座连接到导航栏控件中已经存在的导航项目。然后设置标题以及其中的左右按钮。没工作


立即为上面定义的rootVC设置AppDelegate中的标题和按钮。没用



有什么想法我想念的吗？

最佳答案

在集结了阅读大量Apple文档的力量之后，我解决了这个问题。在此页面上，我发现了这一小段文字：

In a navigation interface, each content view controller in the navigation stack provides a navigation item as the value of its **navigationItem** property. The navigation stack and the navigation item stack are always parallel: for each content view controller on the navigation stack, its navigation item is in the same position in the navigation item stack。

因此，我按原样保留了AppDelegate代码，并将viewDidLoad函数更改为：

override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.
    let nib = UINib(nibName: "EventsHomeView", bundle: nil)
    let objects = nib.instantiateWithOwner(self, options: nil)
    self.view = objects[0] as! UIView;

    print(self.navigationController)

    // customize navigation bar
    let settingsImage = UIImage(named: "settingsWheelBlack.png")
    let settingsNavItem = UIBarButtonItem(image: settingsImage, style: UIBarButtonItemStyle.Plain, target: nil, action: Selector("selector"))
    let addStuffItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Add, target: nil, action: Selector("selector"))

    // Each VC within a navigation controller has it's own navigationItem property that the underlying navigation controller uses to show in the navigationBar
    self.navigationItem.title = "Home"
    self.navigationItem.leftBarButtonItem = settingsNavItem
    self.navigationItem.rightBarButtonItem = addStuffItem
}

和中提琴！

关于swift - 以编程方式创建导航 View ，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/41172513/