How to launch app in landscape? (frustrated)

问题

this issue is supposed to be a simple one... i have googled a lot about it and i have tried all the setups on my project. the thing is i am working on a project that is not mine. the app launched from the app delegate and then i am adding aUIViewController (without XIB file) everything done by code. the ViewController is actually on landscape, but the thing is the the app is running on portrait (when i am pulling the notification view it turns dow like in the portrait mode).

this is implemented in the AppDelegate.m file:

- (NSUInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationLandscapeRight;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
 // Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationLandscapeRight);
 }



- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{                                                                                                     

 return UIInterfaceOrientationMaskLandscapeRight|UIInterfaceOrientationMaskLandscapeLeft|UIInterfaceOrientationMaskPortrait; 

 //if i am writing only the landscape right orientation the app crashes!



}

* Terminating app due to uncaught exception 'UIApplicationInvalidInterfaceOrientation', reason: 'Supported orientations has no common orientation with the application, and shouldAutorotate is returning YES' * First throw call stack: (0x3bfef2a3 0x35ede97f 0x3bfef1c5 0x3518988f 0x3532e579 0x3520dd3d 0x3520cfc7 0x3532f257 0xa5bc1 0x35188319 0x351a4f0f 0x351a4e97 0x3512aa33 0x3bfc46cd 0x3bfc29c1 0x3bfc2d17 0x3bf35ebd 0x3bf35d49 0x3a3032eb 0x351752f9 0x9803b 0x97fe0) libc++abi.dylib: terminate called throwing an exception

if i am writing it with the portrait mode the app launches. i have also tried to add row in the info.plist and set the key to initial interface orientation value to the landscape (right home button). also put the supported interface orientation to lanscape as well. non of this change anything, i just want to know how i can get that behavior to get the notification from above in the landscape mode

Anyone, thanks!

回答1:

Try this way in your app delegate .m file ...

    #define IOS_OLDER_THAN_6 ( [ [ [ UIDevice currentDevice ] systemVersion ] floatValue ] < 6.0 )
    #define IOS_NEWER_OR_EQUAL_TO_6 ( [ [ [ UIDevice currentDevice ] systemVersion ] floatValue ] >= 6.0 )



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


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

            [NSThread sleepForTimeInterval:0.1]; // simulate waiting for server response

            // Override point for customization after application launch.

            self.viewController = [[[ViewController alloc] init] autorelease];

            // Initialise the navigation controller with the first view controller as its root view controller

            UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:self.viewController];

            // This is where we hide the navigation bar! :)

            [navigationController setNavigationBarHidden:NO];

            // Navigation controller has copy of view controller, so release our copy


               [self.viewController release];

            // Add the navigation controller as a subview of our window

            if ([[UIDevice currentDevice].systemVersion floatValue] < 6.0)
            {
                // how the view was configured before IOS6
                [self.window addSubview: navigationController.view];
               // [self.window makeKeyAndVisible];
            }
            else
            {
                // this is the code that will start the interface to rotate once again
        //        [self.window setRootViewController: self.navigationController];
                [self.window setRootViewController:navigationController];
            }

        //    [self.window setRootViewController:navigationController];
            [_window makeKeyAndVisible];
            return YES;
        }


    #ifdef IOS_OLDER_THAN_6
    - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation{
       // [image_signature setImage:[self resizeImage:image_signature.image]];
        return (toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft | toInterfaceOrientation == UIInterfaceOrientationLandscapeRight);
    }
    #endif

    #ifdef IOS_NEWER_OR_EQUAL_TO_6
    -(BOOL)shouldAutorotate {
        return YES;
    }
    - (NSUInteger)supportedInterfaceOrientations {
       // [image_signature setImage:[self resizeImage:image_signature.image]];
        //return UIInterfaceOrientationMaskLandscapeLeft;
        return UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskLandscapeRight;
    }
    #endif

    - (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
    {
        return UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskLandscapeRight;
    }

**`

And also Write down the this code in your all view controller .m file

`**

#define IOS_OLDER_THAN_6 ( [ [ [ UIDevice currentDevice ] systemVersion ] floatValue ] < 6.0 )
#define IOS_NEWER_OR_EQUAL_TO_6 ( [ [ [ UIDevice currentDevice ] systemVersion ] floatValue ] >= 6.0 )


#ifdef IOS_OLDER_THAN_6
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation{
   // [image_signature setImage:[self resizeImage:image_signature.image]];
    //return (toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft | toInterfaceOrientation == UIInterfaceOrientationLandscapeRight);
    if(toInterfaceOrientation ==UIInterfaceOrientationLandscapeLeft){
        NSLog(@"Changed Orientation To Landscape left");

        return (toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft);

    }else{
        NSLog(@"Changed Orientation To Landscape right");
        return (toInterfaceOrientation == UIInterfaceOrientationLandscapeRight);
    }
}
#endif

#ifdef IOS_NEWER_OR_EQUAL_TO_6
-(BOOL)shouldAutorotate {
    return YES;
}
- (NSUInteger)supportedInterfaceOrientations {
  //  [image_signature setImage:[self resizeImage:image_signature.image]];
    //return UIInterfaceOrientationMaskLandscapeLeft;
    return UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskLandscapeRight;
}
#endif

来源：https://stackoverflow.com/questions/13911080/how-to-launch-app-in-landscape-frustrated