Launching into portrait-orientation from an iPhone 6 Plus home screen in landscape orientation results in wrong orientation

Question

The actual title for this question is longer than I can possibly fit:

Launching an app whose root view controller only supports portrait-orientation but which otherw

Answer 1

just call [application setStatusBarOrientation:UIInterfaceOrientationPortrait animated:NO]; in app delegate method - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

in fact the device now is UIInterfaceOrientationPortrait after Launching ,if you touch an inputField ,the keyboard is portrait layout