英文:
Prevent screen change when I press tab which is already selected
问题
我有一个包含4个选项卡的CustomTabBarController。当我在第3个选项卡内时，假设我有一个名为A的屏幕，上面有一个按钮，点击它会跳转到第二个名为B的屏幕。所以，当我在屏幕B上，按下第3个选项卡时，我想保持在屏幕B上。当前应用的行为是，当我在屏幕B上，按下第3个选项卡时，应用程序会导航到屏幕A。
您知道如何解决这个问题吗？
英文:
I have a CustomTabBarController with 4 tabs. When I am inside the 3rd tab, let's say I have a screen called A and I have a button which takes me a second screen called B. So, when I am on screen B and I am pressing the 3rd tab, I want to stay on screen B. The current app behaviour is when I am on screen B and I am pressing the 3rd tab, the app navigates to screen A.
Do you know how to solve this issue?
答案1
得分: 1
在您的CustomTabBarController子类中，继承UITabBarControllerDelegate协议，并在viewDidLoad()方法中将您的控制器的委托设置为self。然后覆盖func tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController) -> Bool方法，如果当前的selectedViewController等于传入的视图控制器，则返回false。
class CustomTabBarController: UITabBarController, UITabBarControllerDelegate {
override func viewDidLoad() {
super.viewDidLoad()
self.delegate = self
}
func tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController) -> Bool {
if selectedViewController == viewController {
return false
}
return true
}
}
英文:
In your CustomTabBarController subclass inherit the UITabBarControllerDelegate protocol and in your viewDidLoad() set your controller's delegate to self. Then override the func tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController) -> Bool method returning false if the current selectedViewController equals the passed in view controller.
class CustomTabBarController: UITabBarController, UITabBarControllerDelegate {
override func viewDidLoad() {
super.viewDidLoad()
self.delegate = self
}
func tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController) -> Bool {
if selectedViewController == viewController {
return false
}
return true
}
}
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