切换内容视图问题 [英] Switching Content Views Issue

问题描述

我正在尝试使用iPhone应用程序切换视图-我有一个父视图控制器 SuperviewController ，然后有两个要在该父视图中切换的视图 MainMenuController 和 MainGameController .

I'm attempting to switch views with an iPhone application- I have a parent view controller, SuperviewController, and then two views that I want to switch within that parent view, MainMenuController and MainGameController.

* EDIT * :我现在正在使用导航控制器:

*EDIT*: I am now using navigation controllers:

viewDidLoad
self.mainMenuController = [[[MainMenuController alloc] initWithNibName:@"MainMenu" bundle:nil];
[[[self navigationController] pushViewController:self.mainMenuController动画:否];
switchToMainGame
self.mainGameController = [[[MainGameController alloc] initWithNibName:@"MainGame" bundle:nil];
[[[self navigationController] pushViewController:self.mainGameController animation:NO];

应用程序通过mainMenu.xib正确加载.但是，当调用 switchToMainGame 时，什么也没发生-好像XCode忘记了mainGameController是什么.

The app loads correctly with the mainMenu.xib. However, when calling switchToMainGame, nothing happens- it's as if XCode forgot what mainGameController is.

感谢您的帮助.

推荐答案

您可能考虑使用UINavigationController交换视图控制器 not 视图.

You might consider swapping view controllers not views, using UINavigationController.

在您的AppDelegate.h

In your AppDelegate.h

@interface AppDelegate : NSObject <UIApplicationDelegate> 
{
    UIWindow *window;
    UINavigationController *navigationController;
}

@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) IBOutlet UINavigationController *navigationController;

@end

在-[AppDelegate applicationDidFinishLaunching:]中实例化navigationController，因此:

And in -[AppDelegate applicationDidFinishLaunching:] instantiate navigationController, thus:

[self setNavigationController:[[UINavigationController alloc] initWithRootViewController:mySuperviewController]];

[[self navigationController] setNavigationBarHidden:YES];   

//  Configure and show the window
[window addSubview:[navigationController view]];
[window makeKeyAndVisible];

然后在SuperviewController.m中，您可以像实例一样实例化MainMenuController和MainGameController.要从MainMenuController开始，您可以在SuperviewController -viewDidLoad

Then within SuperviewController.m you can instantiate your MainMenuController and MainGameController, as you already do. To start with MainMenuController you could do this in SuperviewController -viewDidLoad

[[self navigationController] pushViewController:[self mainMenuController] animated:YES];

您需要添加一些技巧以直接在mainMenuController和mainGameController之间进行切换-但这并不困难.

You would need to add some smarts to switch directly between mainMenuController and mainGameController - but it wouldn't be difficult.

为避免一次又一次地重新加载笔尖，请考虑定义如下访问器方法:

So as not to reload nibs again and again, consider defining accessor methods like this:

- (MainGameController*) mainGameController
{
if (mainGameController == nil)
    {
    mainGameController = [[MainGameController alloc] initWithNibName:@"MainGame" bundle:nil];
    }
return mainGameController;
}

此外，请记住，在同级视图控制器之间进行切换涉及在推入其他视图控制器(例如mainGameController)之前弹出当前视图控制器(例如mainMenuController).

Also, bear in mind that switching between sibling view controllers involve popping current view controller (e.g., mainMenuController) before pushing other view controller (e.g., mainGameController).

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