例如 UIViewController 是你要跳转的控制器
场景一：根控制器是A，需求是A-->B,B-->C,C-->D,D-->B;
场景二：根控制器是B，需求是B-->C,C-->D,D-->B;
NSArray* viewArr = self.navigationController.viewControllers;
if([viewArr[0] isKindOfClass: [UIViewController class]]){
[self.navigationController popToRootViewControllerAnimated:YES];
}else{
NSMutableArray *pageArray = [self.navigationController.viewControllers mutableCopy];
UIViewController *insert = [[UIViewController alloc] init];
//插入界面栈
[pageArray insertObject:insert atIndex: 1];
[self.navigationController setViewControllers:pageArray animated:NO];
[self.navigationController popToViewController:insert animated:YES];
}
