如何禁用UITabBar？

func tabBar(_ tabBar: UITabBar, shouldSelect item: UITabBarItem) -> Bool {
    // 判断是否应该选择该item
    if item.tag == 1 { // 假设您要禁用的是第一个item
        return false
    }
    return true
}

let customView = UIView(frame: CGRect(x: 0, y: 0, width: tabBar.bounds.width, height: tabBar.bounds.height))
let disabledButton = UIButton(frame: CGRect(x: tabBar.bounds.width/2, y: 0, width: tabBar.bounds.width/2, height: tabBar.bounds.height))
disabledButton.isEnabled = false
customView.addSubview(disabledButton)
tabBar.items?[0].customView = customView