常见问题

App方向设置,配置target支持  UIInterfaceOrientationMaskAllButUpsideDown,如果不希望支持多方向,请在您的delegate文件中实现  -  (UIInterfaceOrientationMask)application:(UIApplication  *)application  supportedInterfaceOrientationsForWindow:(UIWindow  *)window{  return  UIInterfaceOrientationMaskPortrait;  }