97 lines
3.5 KiB
Swift
97 lines
3.5 KiB
Swift
//
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// MainTabBarController.swift
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// QuickLocation
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//
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import UIKit
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final class MainTabBarController: UITabBarController {
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// MARK: - View Controllers
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private lazy var locationNav = BaseNavigationController(rootViewController: HomeViewController())
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private lazy var exploreNav = BaseNavigationController(rootViewController: ViewController())
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private lazy var circlesNav = BaseNavigationController(rootViewController: GroupViewController())
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private lazy var mineNav = BaseNavigationController(rootViewController: MineViewController())
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private lazy var navControllers: [BaseNavigationController] = {
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[locationNav, exploreNav, circlesNav, mineNav]
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}()
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// MARK: - Custom Tab Bar
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private let customTabBar: QuickLocationTabBar = {
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let items: [QuickLocationTabBar.TabItem] = [
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QuickLocationTabBar.TabItem(
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title: "位置",
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image: UIImage(named: "Tabbar/location"),
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selectedImage: UIImage(named: "Tabbar/location_selected")
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),
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QuickLocationTabBar.TabItem(
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title: "探索",
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image: UIImage(named: "Tabbar/explore"),
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selectedImage: UIImage(named: "Tabbar/explore_selected")
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),
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QuickLocationTabBar.TabItem(
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title: "圈子",
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image: UIImage(named: "Tabbar/group"),
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selectedImage: UIImage(named: "Tabbar/group_selected")
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),
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QuickLocationTabBar.TabItem(
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title: "我的",
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image: UIImage(named: "Tabbar/mine"),
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selectedImage: UIImage(named: "Tabbar/mine_selected")
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)
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]
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return QuickLocationTabBar(items: items)
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}()
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// MARK: - Lifecycle
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override func viewDidLoad() {
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super.viewDidLoad()
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viewControllers = navControllers
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tabBar.isHidden = true
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for nav in navControllers {
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nav.delegate = self
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}
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view.addSubview(customTabBar)
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customTabBar.delegate = self
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customTabBar.translatesAutoresizingMaskIntoConstraints = false
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let tabBarHeight = customTabBar.intrinsicContentSize.height
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NSLayoutConstraint.activate([
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customTabBar.leadingAnchor.constraint(equalTo: view.leadingAnchor),
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customTabBar.trailingAnchor.constraint(equalTo: view.trailingAnchor),
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customTabBar.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: -41),
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customTabBar.heightAnchor.constraint(equalToConstant: tabBarHeight)
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])
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}
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override func viewDidLayoutSubviews() {
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super.viewDidLayoutSubviews()
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view.bringSubviewToFront(customTabBar)
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}
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/// 更新 tabBar 可见性：当前 tab 的导航栈只有根 VC 时才显示
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/// 在 parent VC 的 viewWillAppear 中回调，比 UINavigationControllerDelegate 更可靠
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func updateTabBarVisibility() {
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guard let nav = selectedViewController as? UINavigationController else { return }
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customTabBar.isHidden = nav.viewControllers.count > 1
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}
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}
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// MARK: - QuickLocationTabBarDelegate
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extension MainTabBarController: QuickLocationTabBarDelegate {
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func tabBar(_ tabBar: QuickLocationTabBar, didSelectTabAt index: Int) {
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selectedIndex = index
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}
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}
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// MARK: - UINavigationControllerDelegate
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extension MainTabBarController: UINavigationControllerDelegate {
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func navigationController(_ navigationController: UINavigationController, willShow viewController: UIViewController, animated: Bool) {
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updateTabBarVisibility()
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}
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}
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