Question

我是iPhone应用的新手，导航控制器出了问题在推和弹出视图中，例如我有三个视图i，e A，B和C. 我将分别（推）到A - > B - ＆gt; C并且即将到来 back（pop）C - ＆gt; B - ＆gt; A工作。

案例1：现在我的要求是跟随A-> C然后我需要从C-> B移动所以我该怎么做？在这种情况我正在使用推（它正在工作）。

案例2：但是当我要去的时候 A-> B-> C并且从C-> B返回我需要使用pop NOT Push。又怎样可以在case1 sand case2中使用Push和pop操作。现在我正在写作通过以下方式。

    // A-->C and C-->B  or if [self.navigationController.viewControllers objectAtIndex:0]

我使用了这段代码：

    CategoryClass *class=[[CategoryClass alloc]initWithNibName:@"CategoryClass" bundle:nil];    
    [self.navigationController pushViewController:class animated:YES];

    // A-->B-->C(push) for back C-->B or if [self.navigationController.viewControllers objectAtIndex:1] i want to use this code
    [self.navigationController popViewControllerAnimated:YES];

如何比较objectAtIndex:0和objectAtIndex:1

Answer 1

NSMutableArray *views=[NSMutableArray arrayWithArray:self.navigationController.viewControllers];
[views removeObjectAtIndex:[views count]-2];
self.navigationController.viewControllers=views;
[self.navigationController popViewControllerAnimated:YES];

尝试更改值而不是2我认为这会帮助你

删除堆栈值并移至您想要的页面.......

谢谢.....

Answer 2

看看我的例子:(读评论=））

UINavigationController *navController;
UIViewController *viewControllerA, *viewControllerB, *viewControllerC;
[navController pushViewController:viewControllerA animated:YES]; // -> A
// some time passed
NSArray *currentViewControllers = [navController viewControllers]; // <- on stack now
NSMutableArray *newStack = [NSMutableArray arrayWithArray:currentViewControllers];
[newStack addObject:viewControllerB]; // <- adding B
[newStack addObject:viewControllerC]; // <- adding C
[navController setViewControllers:newStack animated:YES]; // <- setting new view controllers stack: A, B, C

// returning to B: pop viewControllerC
[navController popViewControllerAnimated:YES];
// or
[navController popToViewController:viewControllerB animated:YES];

Answer 3

我们欢迎您，这不是您是新手的问题，我们在这里为您提供适当的解决方案，亲爱的家伙，首先在appdelegate文件中进行一些更改：

storyboardName = [AppHelper isPhone] ? @"Main_iPhone" : @"Main_iPad";
storyboard = [UIStoryboard storyboardWithName:storyboardName bundle:nil];
navController = (UINavigationController*)[storyboard instantiateInitialViewController];


     UINavigationController *navigationController = (UINavigationController *)self.window.rootViewController;
     UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:storyboardName bundle: nil];
    MainMenu *controller = (MainMenu*)[mainStoryboard instantiateViewControllerWithIdentifier: @"MainMenuiphone"];
    [navigationController pushViewController:controller animated:NO];
     self.window.rootViewController = navigationController;

之后使用此代码来推送视图：

 ANYVIEWCONTROLLER *view = [self.storyboard instantiateViewControllerWithIdentifier:@"ANYVIEWZID"];
 [ [self navigationController] pushViewController:view animated:YES];

在导航控制器中按下并弹出？

3 个答案: