UITabBar的圆角

Question

我想创建一个带圆角的UITabBar。有没有办法让UITabBar有圆角？这将采取第二张图片的形状。

应用程序以tableView开始。当用户点击主题时，会将它们发送到tabBar控制器。

- - - - - - - - 编辑

这是我的AppDelegate：

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

    let tabBarController = window?.rootViewController as! UITabBarController
    let image = UIImage(named: "bar")
    let tabBarImage = resize(image: image!, newWidth: tabBarController.view.frame.width)
    tabBarController.tabBar.backgroundImage = tabBarImage


    return true
}

func resize(image: UIImage, newWidth: CGFloat) -> UIImage {

UIGraphicsBeginImageContext(CGSize(width: newWidth, height: image.size.height))
image.drawInRect( CGRect(x: 0, y: 0, width: newWidth, height: image.size.height))
let newImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()

return newImage!
}

Answer 1

对我来说很好

override func viewWillLayoutSubviews() {
        super.viewWillLayoutSubviews()

        self.tabBarController?.tabBar.layer.masksToBounds = true
        self.tabBarController?.tabBar.isTranslucent = true
        self.tabBarController?.tabBar.barStyle = .default
        self.tabBarController?.tabBar.layer.cornerRadius = 25
        self.tabBarController?.tabBar.layer.maskedCorners = [.layerMinXMinYCorner, .layerMaxXMinYCorner]

    }

Answer 2

嘿，我使用了tabBar的一个简单属性，即backgroundImage。

所以，我在didFinisLaunchingWithOptions的appDelegate中添加了：

let tabBarController = window?.rootViewController as! UITabBarController
    let image = UIImage(named: "bar")
    let tabBarImage = resize(image: image!, newWidth: tabBarController.view.frame.width)
    tabBarController.tabBar.backgroundImage = tabBarImage

和我的自定义方法来改变图像的大小：

func resize(image: UIImage, newWidth: CGFloat) -> UIImage {

    UIGraphicsBeginImageContext(CGSize(width: newWidth, height: image.size.height))
    image.draw(in: CGRect(x: 0, y: 0, width: newWidth, height: image.size.height)) // image.drawInRect( CGRect(x: 0, y: 0, width: newWidth, height: image.size.height))  in swift 2
    let newImage = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()

    return newImage!
}

我使用了png图像作为背景，与你发布的图像相同，但颜色清晰而不是黑色。

希望这有帮助

Answer 3

override func viewWillLayoutSubviews() {
    super.viewWillLayoutSubviews()
    let path = UIBezierPath(roundedRect: CGRect(x: 0, y: 0, width: view.frame.width, height: tabBar.frame.height), cornerRadius: 15)
    let mask = CAShapeLayer()
    mask.path = path.cgPath
    tabBar.layer.mask = mask

}

Answer 4

希望对您有帮助

self.tabBar.layer.masksToBounds = true 
self.tabBar.isTranslucent = true 
self.tabBar.barStyle = .blackOpaque 
self.tabBar.layer.cornerRadius = 20 
self.tabBar.layer.maskedCorners = [.layerMinXMinYCorner, .layerMaxXMinYCorner]

Answer 5

self.tabBarController?.tabBar.layer.cornerRadius = 20
self.tabBarController?.tabBar.layer.masksToBounds = true