xcode 4.2,4.3 不再支持 Window-Based Application 的解决办法：

xcode 4.2 ,4.3 不再支持 Window-Based Application 的解决办法：

     1.创建空项目。

     2.Ctrl+N，创建User Interface下面的Window,命名成MainWindow.xlib

     3.File Owner修改成UIApplication

     4.拖个Object出来修改类为Delegate的那个类，最开始自动生成的那个。

     5.把Delegate类的属性window声明加上IBOutlet，这样才好在IB里面连接。

     6.把window属性连接到IB中默认出现的Window。

     7.给刚才的代理再加个@property (strong,nonatomic)IBOutlet UITabBarController* rootController;属性。

     8.在IB中拖个TabBarController出来，并连接到前面的Object的rootController。

     9.在代理的didFinishLaunchingWithOptions函数中修改下：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions

{

    // Override point for customization after application launch.

   // self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

    [self.windowaddSubview:rootController.view];

    

    [self.windowmakeKeyAndVisible];

    return YES;

}  

    不需要再创建window，然后把rootcontroller的view添加到当前window下面就可以了。

   10.关键一个步骤，打开项目属性，在Summary下面的Main Interface里面选择MainWindow完事。

    编译，运行

XCode4.2中使用Empty Application模板替代旧的Window Based Application

老外的方法:

In the tutorial that I am learning at the moment, it requires “Window-based application”.
Xcode 4.2 beta 4 does not have “window-based application”; so, I created a project with “Empty application”.
Unfortunately, “Empty application” has no longer “MainWindow.xib”, which tutorial teacher said to modify something in it.
So, I googled to make “MainWindow.xib” visible and found this article.

“MainWindow.xib” posted by Jeroen Trappers

What he said is that “MainWindow.xib” is not included by default in templates. He suggested to create “MainWindow.xib” manually as below:
(FYI, this instruction is only for me. It is better to go to original article and follow.)

1. Create new project in Xcode 4.2 beta and choose “Empty Application” template
2. Add “New File” to the project by choosing “iOS -> User Interface -> Empty”
3. Choose “iPhone” and name “MainWindow” (.xib will be added automatically)

4. Open “MainWindow.xib” in project navigator
5. Click “File’s Owner” in “Placeholders”
Change Class as “UIApplication” in “Identity Inspector”
6. Drag “Object” in the library into “Objects” panel on the left
7. Change the class of the Object as your delegate class, such as “DemoAppDelegate”
(The name of object will be automatically change like “Demo App Delegate”)
8. Drag “Window” in the library into “Objects” panel on the left

9. Open “DemoAppDelegate.h” in project navigator
10. Find below code

@interface DemoAppDelegate :

UIResponder

@property (strong, nonatomic)UIWindow *window;

@end

11. Change as below:

@interface DemoAppDelegate :

UIResponder

@property (strong, nonatomic) IBOutlet UIWindow *window;

@end

11. Open “MainWindow.xib” in project navigator
12. Click “File’s Owner” in “Placeholders”
13. Control-Drag “delegate” of “Outlets” in “Connections Inspector” to “Demo App Delegate” in “Objects”
14. Click “Demo App Delgate” in “Objects”
15. Control-Drage “window” of “Outlets” in “Connections Inspector” to “Window” in “Objects”

16. Open “Summary” of your project
17. Find “iPhone / iPod Deployment Info”
18. Change “Main Interface” as “MainWindow”

19. Open “DemoAppDelegate.m” in project navigator
20. Find below code

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

{

self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

// Override point for customization after application launch.

self.window.backgroundColor = [UIColor whiteColor];

[self.window makeKeyAndVisible];

return YES;

}

21. Change as below

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

{

//self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

// Override point for customization after application launch.

//self.window.backgroundColor = [UIColor whiteColor];

[self.window makeKeyAndVisible];

return YES;

}

—- Finish —–