以下是我的代码，它仅在给定的2个选项卡栏项目上显示选项卡栏，但在其他View中不显示选项卡栏。self.window=[[UIWindowalloc]initWithFrame:[[UIScreenmainScreen]bounds]];self.startQuizViewController=[[StartQuizViewControlleralloc]initWithNibName:nilbundle:nil];self.scoreViewController=[[ScoreViewControlleralloc]initWithNibName:nilbundle:nil];sel