App shows black screen on ipod

Question

This app is universal and running perfectly fine on all other devices except iPod. I've used two storyboard.

This is the code which i've written in the AppDelegate .

 -(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
 {    
    UIImage* background = [UIImage imageNamed:@"navigation-bar-background"];
    [[UINavigationBar appearance] setBackgroundImage:background forBarMetrics:UIBarMetricsDefault];

    [[UIBarButtonItem appearance] setBackButtonBackgroundImage:[[UIImage imageNamed:@"black-back-button"]resizableImageWithCapInsets:UIEdgeInsetsMake(0, 10, 0, 10)] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
    [[UIBarButtonItem appearance] setBackButtonBackgroundImage:[[UIImage imageNamed:@"black-back-button-landscape"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 10, 0, 10)] forState:UIControlStateNormal barMetrics:UIBarMetricsLandscapePhone];

    [[UISlider appearance] setThumbImage:[UIImage imageNamed:@"knob-button"] forState:UIControlStateNormal];
    return YES;
}

Answer 1

只需更改图像（确保新的试用图像是png格式化的）并查看它是否显示。

Answer 2

Maybe .. your iPod capabilities.. are not "compliant" (armv7, etc) with your release code What iPod generation? Check - again - your iPod capabilities: http://blog.manbolo.com/2012/10/30/uirequireddevicecapabilities-and-device-compatibility-matrix

Answer 3

我忘了在项目中添加主要故事板。所以，如果其他人遇到同样的问题，那么仔细检查你是否在主故事板中添加了故事板。

Answer 4

There is a problem in how Xcode and how it generates the defaults when handling the storyboards in universal apps. Checkout this answer: https://stackoverflow.com/a/21632289/703530