我有带有滑块的应用程序,我提供了下拉菜单以在用户之间切换。一旦应用程序用户切换到其他用户,我想重置整个导航流程并从第一个屏幕开始。
例如
屏幕 A -> 屏幕 B -> 屏幕 C -> 屏幕 D -> 用户打开滑块并切换用户 -> 跳转到屏幕 A(从导航中删除其他屏幕)。我们可以在这里考虑 gmail 应用程序示例,我们可以在不同的帐户之间切换,并且 gmail 应用程序将用户重定向到主收件箱。
编辑:
我正在使用 git 上提供的滑块菜单库。
https://github.com/dekatotoro/SlideMenuControllerSwift
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
var navigationController: UINavigationController?
var storyboard: UIStoryboard?
var leftViewController: LeftSidePanelViewController?
// var uuid: String?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
if Utility.getUserStatus() == 0 {
storyboard = UIStoryboard(name: "Main", bundle: nil)
let mainViewController = storyboard!.instantiateViewControllerWithIdentifier("LoginViewController") as! LoginViewController
leftViewController = storyboard!.instantiateViewControllerWithIdentifier("LeftSidePanelViewController") as? LeftSidePanelViewController
navigationController = UINavigationController(rootViewController: mainViewController)
UINavigationBar.appearance().tintColor = UIColor.whiteColor()
leftViewController!.mainViewController = navigationController
let slideMenuController = ExSlideMenuController(mainViewController:navigationController!, leftMenuViewController: leftViewController!)
slideMenuController.automaticallyAdjustsScrollViewInsets = true
slideMenuController.delegate = mainViewController
self.window?.backgroundColor = UIColor(red: 236.0, green: 238.0, blue: 241.0, alpha: 1.0)
self.window?.rootViewController = slideMenuController
self.window?.makeKeyAndVisible()
Utility.setUUID(UIDevice.currentDevice().identifierForVendor!.UUIDString)
} else {
storyboard = UIStoryboard(name: "Main", bundle: nil)
let mainViewController = storyboard!.instantiateViewControllerWithIdentifier("HomeViewController") as! HomeViewController
leftViewController = storyboard!.instantiateViewControllerWithIdentifier("LeftSidePanelViewController") as? LeftSidePanelViewController
navigationController = UINavigationController(rootViewController: mainViewController)
UINavigationBar.appearance().tintColor = UIColor.whiteColor()
leftViewController!.mainViewController = navigationController
let slideMenuController = ExSlideMenuController(mainViewController:navigationController!, leftMenuViewController: leftViewController!)
slideMenuController.automaticallyAdjustsScrollViewInsets = true
slideMenuController.delegate = mainViewController
self.window?.backgroundColor = UIColor(red: 236.0, green: 238.0, blue: 241.0, alpha: 1.0)
self.window?.rootViewController = slideMenuController
self.window?.makeKeyAndVisible()
}
return true
}
}
我为此尝试了不同的解决方案,但似乎没有任何效果。
var alreadyPushed = false
//Check if the view was already pushed
if let viewControllers = self.navigationController?.viewControllers {
for viewController in viewControllers {
if let viewController = viewController as? HomeViewController {
self.navigationController?.popToViewController(viewController, animated: true);
print(" Push Your Controller")
alreadyPushed = true
break
}
}
}
if alreadyPushed == false {
print("Pushing...")
let YourControllerObject = self.storyboard?.instantiateViewControllerWithIdentifier("HomeViewController") as! HomeViewController
self.navigationController?.presentViewController(YourControllerObject, animated: true, completion: nil)
// HERE also tried pushViewController but that was also not working..
self.navigationController?.dismissViewControllerAnimated(false, completion: nil)
}
解决方案2:-
还尝试了 self.navigationController?.viewController.removeAll() ,然后推送/呈现 HomeView 但这也不起作用。
任何人有任何建议或技巧来解决这个问题。
一个非常快速的方法:
// Put this line in the UIViewController where you want to reset navigation
self.navigationController?.viewControllers = [self]
您将擦除视图控制器堆栈并重置导航。
可以用它
self.navigationController?.popToRootViewControllerAnimated(true)
或者使用导航堆栈进行一些修改
var viewControllers = self.navigationController?.viewControllers
let firstViewCtr = viewControllers?.first;
viewControllers?.removeAll()
viewControllers?.insert(firstViewCtr!, atIndex: 0)
self.navigationController?.viewControllers = viewControllers!
与其恢复导航,为什么不可以像下面一样再次为 Window 设置 rootViewController 呢?
SharedAppDelegate.window?.rootViewController = MainStoryboard.instantiateViewControllerWithIdentifier("HomeNavigationController")
对于 Swift 3,请使用以下代码:
self?.navigationController?.popToRootViewController(动画:true)