xcode 动态更改导航控制器的 rootviewcontroller
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Changing rootviewcontroller for navigation controller dynamically
提问by Sangeeta
I'm trying to change RootViewControllerfor NavigationControllerin didFinishLaunchingWithOptions.
But I don't know how can I do that.
我正在尝试更改RootViewController为NavigationControllerin didFinishLaunchingWithOptions。
但我不知道我该怎么做。
I have gone through this link as well:
http://starterstep.wordpress.com/2009/03/05/changing-a-uinavigationcontroller%E2%80%99s-root-view-controller/
我也浏览过这个链接：http:
//starterstep.wordpress.com/2009/03/05/changed-a-uinavigationcontroller%E2%80%99s-root-view-controller/
Here is my code in didFinishLaunchingWithOptions:
这是我的代码didFinishLaunchingWithOptions：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
UIViewController *rootController=[[HomePageController alloc] initWithNibName:@"HomePageController" bundle:nil];
navigationController=[[UINavigationController alloc] initWithRootViewController:rootController];
// presentation=[[PresentationController alloc]initWithNibName:@"PresentationController" bundle:nil];
//
// navigationController=[[UINavigationController alloc]initWithRootViewController:presentation];
//
// presentationList=[[PresentationListController alloc]initWithNibName:@"PresentationListController" bundle:nil];
//
// UINavigationController *listnavigation = [[UINavigationController alloc] initWithRootViewController:presentationList];
//
// revealer=[[ZUUIRevealController alloc]initWithFrontViewController:navigationController rearViewController:listnavigation];
[self.window addSubview:navigationController.view];
[self.window makeKeyAndVisible];
return YES;
}
Right now I comment and then run application to change rootviewcontroller. However this is not the practical approach.
现在我评论然后运行应用程序来更改rootviewcontroller. 然而，这不是实用的方法。
Any help will be appreciated.
任何帮助将不胜感激。
回答by Rui Peres
Instead of this:
取而代之的是：
[self.window addSubview:navigationController.view];
Put this:
把这个：
self.window.rootViewController = navigationController;
回答by sc0rp10n
A navigation controller does not care what type of view controller is its root view controller, as long as it is a subclass of UIViewController. So you can just use a pointer to a UIViewController like so:
导航控制器并不关心它的根视图控制器是什么类型的视图控制器，只要它是 UIViewController 的子类。所以你可以像这样使用指向 UIViewController 的指针：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
UIViewController *rootController = nil;
if (iWantHomePageController)
{
rootController = [[HomePageController alloc] initWithNibName:@"HomePageController" bundle:nil];
}
else if (iWantPresentationController)
{
rootController = [[PresentationController alloc] initWithNibName:@"PresentationController" bundle:nil];
}
else if (iWantPresentationListController)
{
rootController = [[PresentationListController alloc] initWithNibName:@"PresentationListController" bundle:nil];
}
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:rootController];
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.rootViewController = navController;
[self.window makeKeyAndVisible];
return YES;
}
回答by Kimpoy
This works really just fine for me:
这对我来说真的很好用：
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
/*
both *navigationController and *viewController are declared
as properties in the .h file
*/
[self setViewController:[[[RootViewController alloc] initWithNibName:@"RootViewController" bundle:nil] autorelease]];
[self setNavigationController:[[[UINavigationController alloc] initWithRootViewController:self.viewController]autorelease]];
[self.window setRootViewController:[self navigationController]];
[self.window makeKeyAndVisible];
