UITabBar背景图像的图像缩放 [英] image scaling for UITabBar background image

问题描述

我已经在我的应用程序中创建了UITabBarController.

I've created UITabBarController in my application.

然后在 viewDidLoad()中，我想更改UITabBar背景图像.这是我正在尝试使其起作用的代码:

Then in viewDidLoad() I want to change UITabBar background image. Here is the code I'm trying to make it works:

class MainTabBarController: UITabBarController {

    override func viewDidLoad() {
        super.viewDidLoad()

        UITabBar.appearance().translucent = false
        UITabBar.appearance().backgroundColor = UIColor.clearColor()
        UITabBar.appearance().backgroundImage = UIImage(named: "tabbar_background")
        UITabBar.appearance().contentMode = .ScaleAspectFit
    }
}

但是结果不正确(图像).有人可以帮我把它填满整个标签栏吗?

But the result isn't correct (image). Can someone help me to make it fill the entire tabbar frame?

推荐答案

尝试将图像调整为选项卡栏大小.或者将 imageView 作为 subview 添加到 tabBar ，然后在该 imageView 中使用该图像.

Try resizing the image to the tab bar size. Or Add an imageView to the tabBar as subview, and then use the image in that imageView.

将 TabBarController 子类化，并在其中添加 imageview :

Subclass the TabBarController and add imageview there:

var bgView: UIImageView = UIImageView(image: UIImage(named: "tabBarBackground.png"))
bgView.frame = CGRectMake(0, 420, 320, 60)//you might need to modify this frame to your tabbar frame
self.view.addSubview(bgView)

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