首先确认你的工程级别 支持横屏
然后在你的UIViewController中：
override func shouldAutorotate() -> Bool {
return false
}
override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
return UIInterfaceOrientationMask.LandscapeLeft
}
override func preferredInterfaceOrientationForPresentation() -> UIInterfaceOrientation {
return UIInterfaceOrientation.LandscapeLeft
}
override func shouldAutorotate() -> Bool {
return false
}
override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
return UIInterfaceOrientationMask.LandscapeLeft
}
override func preferredInterfaceOrientationForPresentation() -> UIInterfaceOrientation {
return UIInterfaceOrientation.LandscapeLeft
}
override func shouldAutorotate() -> Bool {
return false
}
override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
return UIInterfaceOrientationMask.LandscapeLeft
}
override func preferredInterfaceOrientationForPresentation() -> UIInterfaceOrientation {
return UIInterfaceOrientation.LandscapeLeft
}
在启动这个UIViewController中，注意一定要present，不要push，这是个关键
[self.navigationController presentViewController:controller animated:YES completion:nil];
[self.navigationController presentViewController:controller animated:YES completion:nil];
[self.navigationController presentViewController:controller animated:YES completion:nil];
更多可以参考：http://stackoverflow.com/questions/17063020/how-to-load-a-uiviewcontroller-in-landscape-mode-if-its-parent-is-in-portrait-mo