import UIKitclass TabBarController: UITabBarController { override func viewDidLoad { super.viewDidLoadtabs.append(configTab(UIViewController( #技术分享), title: "微信", imageName: "message", identifier: "chats", badgeValue: "3")) tabs.append(configTab(UIViewController, title: "通讯录", imageName: "person.2", identifier: "contacts")) tabs.append(configTab(UIViewController, title: "发现", imageName: "safari", identifier: "discover")) tabs.append(configTab(UIViewController, title: "我", imageName: "person", identifier: "me")) tabs.append(configSearchTab(UIViewController, title: "搜索")) selectedTab = tabs.last self.tabBarMinimizeBehavior = .onScrollDown self.bottomAccessory = UITabAccessory(contentView: UIToolbar) }func configTab(_ viewController: UIViewController, title: String, imageName: String, identifier: String, badgeValue: String? = nil) -> UITab { let tab = UITab(title: title, image: UIImage(systemName: imageName), identifier: identifier) { tab in tab.badgeValue = badgeValue tab.userInfo = identifier let scrollView = UIScrollView(frame: UIScreen.main.bounds) scrollView.backgroundColor = .init(red: .random(in: 0 ... 1), green: .random(in: 0 ... 1), blue: .random(in: 0 ... 1), alpha: 1.0) scrollView.contentSize = CGSize(width: UIScreen.main.bounds.width, height: 1500) viewController.view.addSubview(scrollView) return self.configViewController(viewController: viewController, title: title) } return tab }func configSearchTab(_ viewController: UIViewController, title: String) -> UISearchTab { let searchTab = UISearchTab { tab in viewController.view.backgroundColor = .init(red: .random(in: 0 ... 1), green: .random(in: 0 ... 1), blue: .random(in: 0 ... 1), alpha: 1.0) return self.configViewController(viewController: viewController, title: title) } return searchTab }func configViewController(viewController: UIViewController, title: String) -> UINavigationController { let navigationController = UINavigationController(rootViewController: viewController) viewController.navigationItem.title = title return navigationController } }效果。摘要：import UIKitclass TabBarController: UITabBarController { override func viewDidLoad { super.viewDidLoadtabs.append(configTab(UIView
来源：墨码行者
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