在 TabBarViewController 的选项卡之间传递数据 [英] Passing data between the Tabs of a TabBarViewController

问题描述

我有一个基于 UITabBarController 的应用程序，我想将数据从一个视图传递到另一个视图.我正在故事板中执行此操作，我只是在将其引入主应用程序之前进行一些测试.

I have a UITabBarController based application and I want to pass data from one view to another. I am doing this in storyboard and I am just doing some testing, before bringing it into the main application.

我现在只是用 NSString 尝试这个.

I am just trying this with a NSString at the moment.

当我使用以下代码使用模态转换时，我能够将数据传递给有问题的 VC:

I am able to pass data to the VC in question when I use a modal transition using this code:

NSString *sendingString = @"This string has some content";    
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
NextViewController *nVC = (NextViewController *)[storyboard instantiateViewControllerWithIdentifier:@"goToNextVC"];

nVC.receivingString = sendingString;
[self presentViewController:nVC animated:YES completion:nil];

现在这会推动该 VC 并根据我的需要传递它，但我希望将其推送到另一个标签栏而不是推动 VC.

Now this pushes that VC up and passes it as I want it, but instead of pushing up the VC I want it to be pushed to another Tab Bar.

现在我可以使用以下代码滑动到所需的 TabBar:

Now I can flick to the desired TabBar with this code:

self.tabBarController.selectedIndex = 1;

我卡住的地方是，我如何向这个 ViewController 发送数据???

Where I get stuck is, how do I send data to this ViewController???

推荐答案

您可以子类化 TabBarController，并为其添加属性，或者创建一个单例(例如 DataManager)，所有您的 ViewControllers 将有权访问.您可以将数据传递给它.

You could either subclass your TabBarController, and add a property to it, or create a singleton (e.g. DataManager), to which all your ViewControllers will have access. You can pass your data to it.

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