为什么标签栏项目只显示其标题而没有图标?

Why tab bar items only display their titles without icons?

我创建了一个简单的 TabBarController 并将系统图像作为图标:

class TabBarController: UITabBarController {
        
    private let profile = ProfileView()
    private let explore = ExploreView()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        configure()
    }
    
    private func configure() {
        
        explore.tabBarItem = UITabBarItem(
            title: "Explore",
            image: UIImage(named: "globe")?.withRenderingMode(.alwaysOriginal),
            tag: 0
        )
        
        profile.tabBarItem = UITabBarItem(
            title: "Profile",
            image: UIImage(named: "person.fill")?.withRenderingMode(.alwaysOriginal),
            tag: 1
        )
        
        self.viewControllers = [explore, profile]
        self.selectedIndex = 0
    }
}

但是当我 运行 项目时,我只看到没有图标的标题。有什么问题吗?我发现的其他问题是面向故事板的,但如何以编程方式解决它。

改用如下

    explore.tabBarItem = UITabBarItem(
        title: "Explore",
        image: UIImage(systemName: "globe")?.withRenderingMode(.alwaysTemplate),
        tag: 0
    )

如果图片是系统使用的:

UIImage(systemName: "imageName")?.withRenderingMode(.alwaysTemplate)