什么是StoryBoard ID，我该如何使用它？ [英] What is a StoryBoard ID and how can i use this?

问题描述

我是IOS开发的新手，最近刚开始使用Xcode 4.5。我看到每个viewController都可以设置一些身份变量，包括故事板ID。这是什么以及如何使用它？

i'm new to IOS developing and recently started in Xcode 4.5. I saw for every viewController that i could set some identity variables including the storyboard ID. What is this and how can i use it?

我开始在stackoverflow上搜索，但找不到任何解释。
我认为这不仅仅是一些愚蠢的标签，我可以设置为记住我的控制器吗？它是做什么的？

I started searching on stackoverflow and couldn't find any explanation for it. I assumed it's not just some stupid label that i can set to remember my controller right? What does it do?

推荐答案

故事板ID是一个String字段，可用于根据该故事板创建新的ViewController视图控制器。一个示例用法来自任何ViewController：

The storyboard ID is a String field that you can use to create a new ViewController based on that storyboard ViewController. An example use would be from any ViewController:

//Maybe make a button that when clicked calls this method

- (IBAction)buttonPressed:(id)sender
{
    MyCustomViewController *vc = [self.storyboard instantiateViewControllerWithIdentifier:@"MyViewController"];

   [self presentViewController:vc animated:YES completion:nil];
}

这将基于您命名为MyViewController的故事板ViewController创建一个MyCustomViewController，将它显示在当前的View Controller上方

This will create a MyCustomViewController based on the storyboard ViewController you named "MyViewController" and present it above your current View Controller

如果你在你的app代理中，你可以使用

And if you are in your app delegate you could use

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard"
                                                         bundle: nil];

编辑：Swift

@IBAction func buttonPressed(sender: AnyObject) {
    let vc = storyboard?.instantiateViewControllerWithIdentifier("MyViewController") as MyCustomViewController
    presentViewController(vc, animated: true, completion: nil)
}

编辑Swift> = 3：

Edit for Swift >= 3:

@IBAction func buttonPressed(sender: Any) {
    let vc = storyboard?.instantiateViewController(withIdentifier: "MyViewController") as! ViewController
    present(vc, animated: true, completion: nil)
}

和

let storyboard = UIStoryboard(name: "MainStoryboard", bundle: nil)

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