在UITabBarController中更改选项卡的宽度以调整第六个选项卡

class CustomTabBar: UITabBar {
    override func layoutSubviews() {
        super.layoutSubviews()
        
        // 获取所有的选项卡按钮
        let tabBarButtons = self.subviews.compactMap { $0 as? UIControl }
        
        // 调整第六个选项卡按钮的宽度
        if tabBarButtons.count >= 6 {
            let sixthTabBarButton = tabBarButtons[5]
            let newWidth: CGFloat = 100 // 设置新的宽度
            let newFrame = CGRect(x: sixthTabBarButton.frame.origin.x, y: sixthTabBarButton.frame.origin.y, width: newWidth, height: sixthTabBarButton.frame.size.height)
            sixthTabBarButton.frame = newFrame
        }
    }
}

// 在UITabBarController的子类中使用CustomTabBar
class MyTabBarController: UITabBarController {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 将tabBar属性的类型设置为CustomTabBar
        self.setValue(CustomTabBar(), forKey: "tabBar")
    }
}