Question

我有5个嵌入TabbarController的ViewController。我创建了一个Tabbar类来自定义我的Tabbar，例如：

class Tabbar: UITabBarController,UITabBarControllerDelegate {

var tabBarIteam = UITabBarItem()

@IBOutlet weak var tabbar: UITabBar!

 override func viewDidLoad() {

     super.viewDidLoad()
                        // THIS IS FOR FİRST TABBAR ITEM
   let selectedImage1 = UIImage(named: "vitrin_active")?.withRenderingMode(.alwaysOriginal)
    let deSelectedImage1 = UIImage(named: "vitrin_deactive")
           tabBarIteam = self.tabBar.items![0]
           tabBarIteam.image = deSelectedImage1
           tabBarIteam.selectedImage = selectedImage1

  .... I HAVE ALSO 4 MORE.
}

在我的firstViewController中，有一个按钮动作

    @IBAction func ChangeTabbarimageAndAction(_ sender: Any) {
    ..
}

我想在点击FirstView的Tabbar时更改ChangeTabbarimageAndAction的图像和动作（例如推入）。这可能吗？如果是，我该怎么办？我搜索了SO，但找不到任何解决方案。

Answer 1

如果您想更改当前UIViewController的标签栏图像或标题，则可以从tabBarItem访问UIViewController，并可以更改其属性，如下所示：

@IBAction func ChangeTabbarimageAndAction(_ sender: Any) {
    tabBarItem.image = UIImage(named: "New Image name")
    tabBarItem.selectedImage = UIImage(named: "NewSelectedImageName")
    tabBarItem.title = "New Title"
}

Answer 2

您可以在标签栏的委托方法中更改操作

 class yourclass: UIViewController, UITabBarDelegate {
        func tabBar(_ tabBar: UITabBar, didSelect item: UITabBarItem) {
            print("push or present action")
        }
    }

要设置图像，您可以使用

 let firstViewController:UIViewController = UIViewController()
        // The following statement is what you need
        let customTabBarItem:UITabBarItem = UITabBarItem(title: nil, image: UIImage(named: "YOUR_IMAGE_NAME"), selectedImage: UIImage(named: "YOUR_IMAGE_NAME"))

        firstViewController.tabBarItem = customTabBarItem

有没有办法从嵌入式ViewController更改Tabbar图像和操作？

2 个答案: