为了你想要的效果，我建议你创建一个对象（我以“RootController”为例）来管理应用程序的Window.RootController。
不知道大家有没有修改window的RootController的经验，就按照我的步骤来吧：
首先创建一个新项目，删除storyboard和Viewcontroller.cs。（不要忘记删除info.plist中storyboard的bundle）
然后重写你的 AppDelegate.cs，像这样：
[Register ("AppDelegate")]
public class AppDelegate : UIApplicationDelegate
{
UIWindow window;
public override bool FinishedLaunching (UIApplication application, NSDictionary launchOptions)
{
// create a new window instance based on the screen size
window = new UIWindow (UIScreen.MainScreen.Bounds);
window.RootViewController = RootController.Instance.LoginController;
window.MakeKeyAndVisible ();
return true;
}
public override void OnResignActivation (UIApplication application)
{
// Invoked when the application is about to move from active to inactive state.
// This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message)
// or when the user quits the application and it begins the transition to the background state.
// Games should use this method to pause the game.
}
public override void DidEnterBackground (UIApplication application)
{
// Use this method to release shared resources, save user data, invalidate timers and store the application state.
// If your application supports background exection this method is called instead of WillTerminate when the user quits.
}
public override void WillEnterForeground (UIApplication application)
{
// Called as part of the transiton from background to active state.
// Here you can undo many of the changes made on entering the background.
}
public override void OnActivated (UIApplication application)
{
// Restart any tasks that were paused (or not yet started) while the application was inactive.
// If the application was previously in the background, optionally refresh the user interface.
}
public override void WillTerminate (UIApplication application)
{
// Called when the application is about to terminate. Save data, if needed. See also DidEnterBackground.
}
}
这是 RootController.cs，其中包含一个 UINavigationController 和一个 UITabBarController(Home - Search - Profile)：
public class RootController
{
private static RootController instance;
public static RootController Instance {
get {
if (instance == null)
instance = new RootController ();
return instance;
}
}
private static UINavigationController loginController;
public UINavigationController LoginController {
get {
if (loginController == null)
InitLoginController ();
return loginController;
}
}
private void InitLoginController()
{
UIViewController loginViewController = new UIViewController (){ Title = "LoginController" };
loginViewController.View.Frame = UIScreen.MainScreen.Bounds;
loginViewController.View.BackgroundColor = UIColor.Red;
loginViewController.NavigationItem.SetRightBarButtonItem (new UIBarButtonItem ("MainTab",UIBarButtonItemStyle.Done, delegate {
UIApplication.SharedApplication.KeyWindow.RootViewController = RootController.Instance.MainTabController;
}),true);
loginController = new UINavigationController (loginViewController);
}
private static UITabBarController mainTabController;
public UITabBarController MainTabController {
get {
if (mainTabController == null)
InitMainTabController ();
return mainTabController;
}
set {
mainTabController = value;
}
}
private void InitMainTabController ()
{
mainTabController = new UITabBarController ();
mainTabController.ViewControllers = new UIViewController [] {
new UINavigationController(new HomeViewController() {
TabBarItem = new UITabBarItem (UITabBarSystemItem.Favorites,0)
}),
new UINavigationController (new UIViewController ()
{
Title = "SearchController",
TabBarItem = new UITabBarItem (UITabBarSystemItem.Search,1)
}),
new UINavigationController (new UIViewController ()
{
Title = "ProfileController",
TabBarItem = new UITabBarItem (UITabBarSystemItem.More,2)
})
};
mainTabController.SelectedIndex = 0;
}
}
这是 HomeController.cs，它可以根据需要推送 UITableViewController，如果需要，还有返回 LoginController 的按钮：
public class HomeViewController : UIViewController
{
public HomeViewController ()
{
Title = "HomeController";
this.View.Frame = UIScreen.MainScreen.Bounds;
this.View.BackgroundColor = UIColor.Green;
//Set a button to return to loginController
this.NavigationItem.SetLeftBarButtonItem (new UIBarButtonItem ("LoginC",UIBarButtonItemStyle.Done, delegate {
UIApplication.SharedApplication.KeyWindow.RootViewController = RootController.Instance.LoginController;
}),true);
//Set a button to go to tableController
UITableViewController tableViewController = new UITableViewController (){ Title = "TableViewController" };
tableViewController.View.Frame = UIScreen.MainScreen.Bounds;
tableViewController.View.BackgroundColor = UIColor.White;
tableViewController.HidesBottomBarWhenPushed = true;//To make tabbar disappear
this.NavigationItem.SetRightBarButtonItem (new UIBarButtonItem ("TableView",UIBarButtonItemStyle.Done, delegate {
this.NavigationController.PushViewController(tableViewController,true);
}),true);
}
}
您可以在 RootController.cs 中添加自己的 ViewController，而不是我的示例控制器。
如果还有问题，就留在这里，我稍后再检查。
希望对你有帮助。