Swift Tabbar的使用

在 Swift 中使用 UITabBarController 来创建一个具有选项卡界面的应用程序。下面是一个简单的示例，演示如何在 Swift 中使用 UITabBarController：

swift">import UIKit

class RootTabbar: UITabBarController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        let nav1 = UINavigationController(rootViewController: ControlMainController())
        let nav2 = UINavigationController(rootViewController: BusinessMainController())
        let nav3 = UINavigationController(rootViewController: OtherMainClassController())
        
        //设置tabBaritem的标题
        nav1.tabBarItem.title = "控件"
        nav2.tabBarItem.title = "业务"
        nav3.tabBarItem.title = "其他"
        
        //设置tabBaritem的普通状态的图标
        nav1.tabBarItem.image = UIImage(named:"tabbar_1")
        nav2.tabBarItem.image = UIImage(named:"tabbar_2")
        nav3.tabBarItem.image = UIImage(named:"tabbar_3")
        
        //设置tabBaritem选中的图标
        nav1.tabBarItem.selectedImage = UIImage(named: "tabbar_1a")?.withRenderingMode(UIImage.RenderingMode.alwaysOriginal)
        nav2.tabBarItem.selectedImage = UIImage(named: "tabbar_2a")?.withRenderingMode(UIImage.RenderingMode.alwaysOriginal)
        nav3.tabBarItem.selectedImage = UIImage(named: "tabbar_3a")?.withRenderingMode(UIImage.RenderingMode.alwaysOriginal)
        
        //设置tabBaritem的标题文字颜色
        self.tabBar.tintColor = UIColor.COLOR(r: 87, g: 173, b: 57)
        self.viewControllers = [nav1, nav2, nav3]
    }
}