iPad(UISplitViewController)iosxcode中如何控制后退按钮导航

Question

我已使用以下代码从导航控制器 (viewcontrollers) 中删除我的登录页面，以便在返回（后退按钮）时它不会再次出现在视图中。

if(UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
{
    NSMutableArray *VCs = [NSMutableArray arrayWithArray:self.navigationController.viewControllers];
    if([[VCs objectAtIndex:[VCs count] - 2] isKindOfClass:[loginViewController class]]&&(VCs.count>=4))
    {
        [VCs removeObjectAtIndex:[VCs count] - 2];
        [VCs removeObjectAtIndex:[VCs count] - 2];
        [self.navigationController setViewControllers: VCs];
    }
}

这非常适合 iPhone。但是对于iPad，因为我们使用的是splitViewController，如果我们这样编码

NSMutableArray *VCs = [NSMutableArray arrayWithArray:self.splitViewController.viewControllers];

我们将得到一个导航控制器数组。是否存在我们可以从拆分 viewcontroller 中删除特定 viewcontroller 的真正逻辑？

Answer 1

如您所说，您的拆分视图控制器将 return 一组导航控制器（取决于项目设置）。一旦你有了对它们的引用，你就可以随心所欲地操纵它们。

UISplitViewController *splitViewController = (UISplitViewController *)self.window.rootViewController;
UINavigationController *masterNavVC = (UINavigationController *)splitViewController.viewControllers.firstObject;
UINavigationController *detailNavVC = (UINavigationController *)splitViewController.viewControllers.lastObject;

//Now you have the master and detail navigation controllers, get your VC you need to manipulate
NSMutableArray *masterVCs = masterNavVC.viewControllers;
NSMutableArray *detailVCs = detailNavVC.viewControllers;

//Remove the ones you need to - this example is arbitrary. Put your logic here
if(masterVCs.count > 0 && [masterVCs[0] isKindOfClass:[LoginViewController class]])
{
     //Remove or add
}

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