Iphone 如何从一个视图控制器弹出到另一个视图控制器

使用iOS，我现在有15个视图控制器，我想从一个视图控制器弹出到另一个视图控制器

我正在使用以下代码：

SecondViewController *Sec=[SecondViewController alloc]init];
[self.navigationController popViewController:Sec animated:YES];

NSArray *array = [self.navigationController viewControllers];
[self.navigationController popToViewController:[array objectAtIndex:1] animated:YES];

这显示错误

此ViewController不存在

，然后我使用此代码：

SecondViewController *Sec=[SecondViewController alloc]init];
[self.navigationController popViewController:Sec animated:YES];

NSArray *array = [self.navigationController viewControllers];
[self.navigationController popToViewController:[array objectAtIndex:1] animated:YES];

此代码可以从thirdViewController弹出到secondViewController。但是当我们从第九（9）个ViewController弹出到第五（5）个ViewController时发生了什么，然后我在第九（9）个ViewController中使用以下代码：

NSArray *array = [self.navigationController viewControllers];
[self.navigationController popToViewController:[array objectAtIndex:4] animated:YES];

它不会从第九（9）个ViewController弹出到第五（5）个ViewController，而是从第九（9）个ViewController弹出到第八（8）个ViewController。我不知道我们使用这条线路时发生了什么：

NSArray *array = [self.navigationController viewControllers];
NsLog(@"array = %@",array);

当我们在

第九（9）视图控制器中使用此选项时

。NsLog显示：

array=   First(1st)ViewController;  
         Second(2nd)ViewController;
         Eight(8th)ViewController;
         Ninth(9th)ViewController;

我不知道为什么只有四个视图控制器显示。每当我使用15个视图控制器时。此问题发生在每个视图控制器中。例如，如果我使用从第十五（15）个ViewController到第五（5）个ViewController的pop表单，那么同样的问题也会出现

NSArray *array = [self.navigationController viewControllers];
NsLog(@"array = %@",array);

array=     First(1st)ViewController;  
           Second(2nd)ViewController;
           fourteenth(14th)ViewController;
           fifteenth(15th)ViewController;

我想数一数ViewController的数量，然后跳到特定的ViewController。

像这样试试

MyTableViewController *vc = [[MyTableViewController alloc] init];
NSMutableArray *controllers = [NSMutableArray    
arrayWithArray:self.navigationController.viewControllers];
[controllers removeLastObject];
[controllers addObject:vc]; 

第一:

您无法执行此操作，因为您分配了不在导航控制器中的新

Sec

视图控制器

考虑使用以下方法：

您在9视图控制器中

for (int i= 0 ; i < [[self.navigationController viewControllers]count] ; i++) {
    if ( [[[self.navigationController viewControllers] objectAtIndex:i] isKindOfClass:[FifiViewControllerClassname class]]) {
        [self.navigationController popToViewController:[array objectAtIndex:i] animated:YES];
    }
}

for（int i=0；i<[[self.navigationController viewControllers]计数]；i++）{
如果（[[[self.navigationController viewControllers]objectAtIndex:i]是类：[fififiviewcontrollerclassname类]]）{
[self.navigationController popToViewController:[array objectAtIndex:i]动画：是]；
}
}

您不能弹出到新的视图控制器（就像您在第二个视图控制器示例中所做的那样）

当使用UINavigationController时

使用以下命令将控制器添加到堆栈中：

[self.navigationController pushViewController:<yournewViewController> animated:YES];

弹出到堆栈中的上一个控制器（之前必须已推送）：

试试这个

 [self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:0] animated:YES];

BOOL check=FALSE；
NSArray*ViewController=[[self-navigationController]ViewController]；
id-obj；
对于（int i=0；i，对于Swift 3.0，使用过滤器：

let desiredViewController = self.navigationController!.viewControllers.filter { $0 is YourViewController }.first!
self.navigationController!.popToViewController(desiredViewController, animated: true)

Swift 4.0-Swift 5.0

 for controller in self.navigationController!.viewControllers as Array {
            if controller.isKind(of: HomeViewController.self) {
                self.navigationController!.popToViewController(controller, animated: true)
                break
            }
        }

您确定所有ViewController都已推送到NavigationController吗？
 [self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:0] animated:YES];

BOOL check = FALSE;
NSArray *viewControllers = [[self navigationController] viewControllers];
id obj;
for( int i=0;i<[viewControllers count];i++)
{
    obj=[viewControllers objectAtIndex:i];
    if([obj isKindOfClass:[yourclassname class]])
    {
        check = TRUE;
        break;
    }
}

if (check)
{

    [[self navigationController] popToViewController:obj animated:YES];
}
else
{
    yourclassname *yourclassnameObj=[self.storyboard instantiateViewControllerWithIdentifier:@"yourclassStoryBoardID"];
    [self.navigationController pushViewController:yourclassnameObj animated:true];

}

let desiredViewController = self.navigationController!.viewControllers.filter { $0 is YourViewController }.first!
self.navigationController!.popToViewController(desiredViewController, animated: true)

 for controller in self.navigationController!.viewControllers as Array {
            if controller.isKind(of: HomeViewController.self) {
                self.navigationController!.popToViewController(controller, animated: true)
                break
            }
        }