如何以编程方式更改标签栏项目使用的默认图标？

Posted 2023-02-23

【中文标题】如何以编程方式更改标签栏项目使用的默认图标？

【英文标题】：How to programmatically change the default icon used by a tab bar item?

【发布时间】：2020-03-02 04:25:13

【问题描述】：

我有一个TabBar 项目，它是一个名为“购物车”的购物车大纲。这是XCode 提供的默认图标。使用按钮的选项卡，我想将此图标更改为XCode 提供的另一个默认图标，称为“cart.fill”

shoppingCartIcon.image = UIImage(named: "cart.fill")

我已经尝试了上述方法，但是这不起作用。有没有我忽略的简单解决方案？

【问题讨论】：

看到这个寻求帮助：how to programmatically change the tabbarItem's image

【参考方案1】：

您可以在这个类中进行与标签栏相关的所有自定义。只需将此类 TabbarViewController 分配给情节提要中的 UITabbarController 并相应地自定义所有图像和标题。

class TabbarViewController: UITabBarController 

    override func viewDidLoad() 
        super.viewDidLoad()

        let arrayOfImageNameForUnselectedState = ["home_unselected","info_unselected","puzzle","video","more"]

        let arrayOfImageNameForSelectedState = ["home_selected","info_selected"]

        let titlesArray = ["Home","About Us"]

        // Do any additional setup after loading the view.

        if let count = self.tabBar.items?.count 
            for i in 0...(count-1) 
                let imageNameForSelectedState   = arrayOfImageNameForSelectedState[i]
                let imageNameForUnselectedState = arrayOfImageNameForUnselectedState[i]


                self.tabBar.items?[i].title = titlesArray[i]

                self.tabBar.items?[i].selectedImage = UIImage(named: imageNameForSelectedState )?.withRenderingMode(.alwaysOriginal)
                self.tabBar.items?[i].image = UIImage(named: imageNameForUnselectedState )?.withRenderingMode(.alwaysOriginal)
            
        



        let selectedColor   = UIColor(red: 233.0/255.0, green: 41.0/255.0, blue: 47.0/255.0, alpha: 1.0)
        let unselectedColor = UIColor(red: 127.0/255.0, green: 140.0/255.0, blue: 141.0/255.0, alpha: 1.0)

        UITabBarItem.appearance().setTitleTextAttributes([NSAttributedString.Key.foregroundColor: unselectedColor], for: .normal)
        UITabBarItem.appearance().setTitleTextAttributes([NSAttributedString.Key.foregroundColor: selectedColor], for: .selected)

    

    override func didReceiveMemoryWarning() 
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.