强制App导航到AppDidBecomeActive中的特定视图

Question

I want to let the user be able to navigate to a specific view under certain circumstances, when the App runs again from the background.

For now I'm using this piece of code to force my App:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
                        self.window.rootViewController = self.viewController;
                        [self.window makeKeyAndVisible];

                    return YES;
            }

- (void)applicationDidBecomeActive:(UIApplication *)application {
        if(this situation occurs){
                NavigationViewController *vc = [[NavigationViewController alloc] init];
                            self.window.rootViewController = vc;
                            [vc release];
        }
        eles{
                Password *vc = [[Password alloc] init];
                            self.window.rootViewController = vc;
                            [vc release];
        }
}
- (void)dealloc {
                    //[password release];
                    [_window release];
                    [_viewController release];
                    [super dealloc];
}

@end

However I think my previous view is still running somehow (a timer still runs). How am I able to release the previous view ans start 'clean' again.

EDIT:

The solution was to check if the window has a subview. If it has it will be removed from the superview. Afterwords the new view is created and added to the view as a subview

for (UIView *subView in [self.window subviews]) {
                [subView removeFromSuperview];
            }


            self.viewController = [[[MyNewNibFile alloc] initWithNibName:@"MyNewNibFile" bundle:nil] autorelease];
            [self.window addSubview:self.viewController.view];

Answer 1

制作NavigationViewController和password的全局实例，即在appdelegate.h中声明它们，并在创建新的Navigation Controller和password实例之前，始终检查它们是否已创建。如果已创建，则先释放它们，然后创建一个新实例。