我发现很多问题强制UIViewController默认横向:HowtoforceaUIViewControllertoPortraitorientationiniOS6试试这个:-(BOOL)shouldAutorotate{returnYES;}-(NSUInteger)supportedInterfaceOrientations{returnUIInterfaceOrientationMaskLandscape;}-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation{returnUIInterfa