在swift中设置navigationBar背景图片

Question

下面的代码对我不起作用，任何人都可以帮助弄清楚出了什么问题吗？

var image = UIImage(named: "10384605_10152519403846670_5189785375955620548_n.jpg") as UIImage

self.navigationController.navigationBar.setBackgroundImage(image , forBarMetrics:UIBarMetrics)

Answer 1

self.navigationController.navigationBar.setBackgroundImage(image, 
                                                   forBarMetrics: .Default)

Answer 2

在AppDelegate.swift中

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

    //Image Background Navigation Bar
    let navBackgroundImage:UIImage! = UIImage(named: "backgroundNB.png")
    UINavigationBar.appearance().setBackgroundImage(navBackgroundImage, forBarMetrics: .Default)

    return true
}

Answer 3

在Swift 3中：

如果要在后台添加重复图像，可以在AppDelegate> didFinishLaunchingWithOptions中进行此调用：

let image = UIImage(named: "imageNameInAsset")
UINavigationBar.appearance().setBackgroundImage(image, for: .default)

如果要将图像添加到导航栏的中心，则需要在ViewController> viewWillAppear中执行此操作：

let titleView = UIImageView(image: UIImage(named: "imageNameInAsset"))
self.navigationItem.titleView = titleView

Answer 4

如果要在导航栏中填充图像，只需使用以下代码：

self.navigationController?.navigationBar.setBackgroundImage(UIImage(named: "your_Background_Image_Name")?.resizableImage(withCapInsets: UIEdgeInsets.zero, resizingMode: .stretch), for: .default)

Answer 5

let navBackgroundImage:UIImage! = UIImage(named: "navbar_bg")

[UINavigationBar .appearance().setBackgroundImage(navBackgroundImage, forBarMetrics:.Default)]

Answer 6

对于Swift 3：

在AppDelegate.swift中：

UINavigationBar.appearance().setBackgroundImage(UIImage(named:"pattern.png"),
                                                                for: .default)

要么

在viewDidLoad（）中：

self.navigationController?.navigationBar.setBackgroundImage(UIImage(named:"pattern.png"),
     for: .default)

Answer 7

将以下代码添加到AppDelegate.swift中的didFinishLaunchingWithOptions方法：

    if let myImage = UIImage(named: "navBarImage.jpg"){
        UINavigationBar.appearance().setBackgroundImage(myImage, for: .default)
    }

Answer 8

@benLIVE询问如何做一个后退按钮，当我找到接受的答案时我正在做的事情，所以我想我也会把它留在这里（如果有点晚）b / c如果要更换导航栏图标，您也可以替换所有这些！

    let cubeIcon = UIImageView(image: yourImage)
    cubeIcon.contentMode = .scaleAspectFit
    self.navigationItem.backBarButtonItem?.image = cubeIcon.image

Answer 9

在导航控制器中设置背景图像

self.navigationController?.navigationBar .setBackgroundImage(UIImage(named: "cricket"), for: .default)