self.navigationController跳转问题汇总

self.navigationController遇到很多问题，如限制控制器的个数，跳转到根目录，跳转指定页面，多次跳转等问题，下面对其做了些总结，方便后期需要

通过计算viewcontrollers容器中控制器的个数来，限制推控制器的个数

if (self.navigationController.viewControllers.count > 3) {
                    //当推到第三个时，不允许继续推
                    [self.navigationController popViewControllerAnimated:YES];
                   //跳转到最原始的根目录
                    [self.navigationController popToRootViewControllerAnimated:YES];
                    return;
                }

//返回根页面vc用 ：

[self.navigationController popToRootViewController］;

//返回指定的某个vc用下面（通过index定位）

  [self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:2] animated:YES];  

//或（通过class定位）

  for (UIViewController *controller in self.navigationController.viewControllers) {    
     if ([controller isKindOfClass:[FPHMyFindHouseVC class]]) {
                 [self.navigationController popToViewController:controller animated:YES];     }
 }

//利用拿到的nav的controllers数组进行跳转

NSArray *vcs = self.navigationController.viewControllers;                               
NSMutableArray *array = [NSMutableArray array];                               
for (int i = 0; i < vcs.count; i++) {                    
UIViewController *temp = [vcs objectAtIndex:i];                    
[array addObject:temp];                   
 if ([temp isKindOfClass:[FPHMyFindHouseVC class]]) {  
               break;              
      }             
   }               
 [array  addObject:receiveViewController];

[self.navigationController setViewControllers:array animated:YES];

这是目前所遇到的一些问题汇总。