大前端开发中的路由管理之四：iOS篇

龙珠激斗

UINavigationController*nav=[[UINavigationControlleralloc]init];//  新建两个ViewController，并设置他们的View的背景颜色UIViewController*vc1=[[UINavigationControlleralloc]init];vc1.view.backgroundColor=[UIColorredColor];UIViewController*vc2=[[UINavigationControlleralloc]init];vc2.view.backgroundColor=[UIColorblueColor];   [navpushViewController:vc1animated:NO]; //把vc1推到nav的stack中[navpushViewController:vc2animated:NO]; //把vc2推到nav的stack中UIViewController*top=nav.topViewController; //这时top其实就是vc2[nav popViewControllerAnimated:NO];             //这时nav的顶层VC被pop出，top变成vc1