我的标签栏中有3个项目,每个项目链接到一个单独的viewController,我希望每次在任何这些项目之间切换时它们都会重置。
我怎样才能做到这一点?
您可以为选项卡栏控制器创建子类并在其中执行所需的操作。
class TabBarViewController: UITabBarController, UITabBarControllerDelegate {
override func viewDidLoad() {
super.viewDidLoad()
self.delegate = self
}
func tabBarController(_ tabBarController: UITabBarController, didSelect viewController: UIViewController) {
let viewController0: UIViewController? = tabBarController.viewControllers?[0] as? UIViewController
let viewController1: UIViewController? = tabBarController.viewControllers?[1] as? UIViewController
let viewController2: UIViewController? = tabBarController.viewControllers?[2] as? UIViewController
switch self.selectedIndex {
case 0:
// Refresh viewController1
// Refresh viewController2
case 1:
// Refresh viewController2
// Refresh viewController3
case 2:
// Refresh viewController0
// Refresh viewController1
default:
break
}
}
}