iOS修改啟動的時候的橫豎屏的方法

在iOS目錄下面的  RootViewController裡面的 

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

{

    //如果要初始化為橫屏

    //return UIInterfaceOrientationIsLandscape( interfaceOrientation );

   //如果要初始化為豎屏

    return UIInterfaceOrientationIsPortrait( interfaceOrientation );

}