在Swift中实例化和呈现viewController

ゞ浴缸里的玫瑰 2022-11-26 11:57 143阅读 0赞

本文翻译自：[Instantiate and Present a viewController in Swift][]

## *Issue* **问题** ##

*I started taking a look of the new `Swift` on `Xcode 6` , and I tried some demo projects and tutorials.* **我开始看看`Xcode 6`上的新`Swift` ，我尝试了一些演示项目和教程。** *Now I am stuck at:* **现在我被困在：**

***Instantiating and then presenting a `viewController` from a specific storyboard*** **实例化然后从特定的故事板呈现`viewController`**

## *Objective-C Solution* **Objective-C解决方案** ##

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"myStoryboardName" bundle:nil];
    UIViewController *vc = [storyboard instantiateViewControllerWithIdentifier:@"myVCID"];
    [self presentViewController:vc animated:YES completion:nil];

*How to achieve this on Swift?* **如何在Swift上实现这一目标？**

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### \#1楼 ###

参考：[https://stackoom.com/question/1CQRa/在Swift中实例化和呈现viewController][https_stackoom.com_question_1CQRa_Swift_viewController]

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### \#2楼 ###

*It all is a matter of the new syntax, functionality hasn't changed:* **这一切都是新语法的问题，功能没有改变：**

// Swift 3.0
    
    let storyboard = UIStoryboard(name: "MyStoryboardName", bundle: nil)
    let controller = storyboard.instantiateViewController(withIdentifier: "someViewController")
    self.present(controller, animated: true, completion: nil)

*If you're having problems with `init(coder:)` , please refer to [EridB's answer][EridB_s answer] .* **如果您遇到`init(coder:)` ，请参考[EridB的答案][EridB_s answer] 。**

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### \#3楼 ###

*For people using [@akashivskyy's answer][akashivskyy_s answer] to instantiate `UIViewController` and are having the exception:* **对于使用[@ akashivskyy的答案][akashivskyy_s answer]来实例化`UIViewController`并且有异常的人：**

> *fatal error: use of unimplemented initializer 'init(coder:)' for class* **致命错误：在课堂上使用未实现的初始化程序'init（coder :)'**

***Quick tip:*** **小建议：**

*Manually implement `required init?(coder aDecoder: NSCoder)` at your destination `UIViewController` that you are trying to instantiate* **在您尝试实例化的目标`UIViewController`上手动实现`required init?(coder aDecoder: NSCoder)`**

required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }

*If you need more description please refer to my answer [here][]* **如果你需要更多的描述，请参阅我的答案[在这里][here]**

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### \#4楼 ###

// "Main" is name of .storybord file "
    let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
    // "MiniGameView" is the ID given to the ViewController in the interfacebuilder
    // MiniGameViewController is the CLASS name of the ViewController.swift file acosiated to the ViewController
    var setViewController = mainStoryboard.instantiateViewControllerWithIdentifier("MiniGameView") as MiniGameViewController
    var rootViewController = self.window!.rootViewController
    rootViewController?.presentViewController(setViewController, animated: false, completion: nil)

*This worked fine for me when i put it in AppDelegate* **当我把它放在AppDelegate中时，这对我来说很好**

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### \#5楼 ###

*[This link has both the implementations:][This link has both the implementations]* **[此链接具有以下两种实现：][This link has both the implementations]**

*Swift:* **迅速：**

let viewController:UIViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewControllerWithIdentifier("ViewController") as UIViewController
    self.presentViewController(viewController, animated: false, completion: nil)

*Objective C* **目标C.**

UIViewController *viewController = [[UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil] instantiateViewControllerWithIdentifier:@"ViewController"];

*[This link has code for initiating viewcontroller in the same storyboard][]* **[此链接具有用于在同一故事板中启动viewcontroller的代码][This link has code for initiating viewcontroller in the same storyboard]**

/*
     Helper to Switch the View based on StoryBoard
     @param StoryBoard ID  as String
    */
    func switchToViewController(identifier: String) {
        let viewController = self.storyboard?.instantiateViewControllerWithIdentifier(identifier) as! UIViewController
        self.navigationController?.setViewControllers([viewController], animated: false)
    
    }

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### \#6楼 ###

*akashivskyy's answer works just fine!* **akashivskyy的回答很好！** *But, in case you have some trouble returning from the presented view controller, this alternative can be helpful.* **但是，如果您从显示的视图控制器返回时遇到一些问题，则此替代方法可能会有所帮助。** *It worked for me!* **它对我有用！**

*Swift:* **迅速：**

let storyboard = UIStoryboard(name: "MyStoryboardName", bundle: nil)
    let vc = storyboard.instantiateViewControllerWithIdentifier("someViewController") as! UIViewController
    // Alternative way to present the new view controller
    self.navigationController?.showViewController(vc, sender: nil)

*Obj-C:* **OBJ-C：**

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MyStoryboardName" bundle:nil];
    UIViewController *vc = [storyboard instantiateViewControllerWithIdentifier:@"someViewController"];
    [self.navigationController showViewController:vc sender:nil];

[Instantiate and Present a viewController in Swift]: https://oldbug.net/q/1CQRa/Instantiate-and-Present-a-viewController-in-Swift
[https_stackoom.com_question_1CQRa_Swift_viewController]: https://stackoom.com/question/1CQRa/%E5%9C%A8Swift%E4%B8%AD%E5%AE%9E%E4%BE%8B%E5%8C%96%E5%92%8C%E5%91%88%E7%8E%B0viewController
[EridB_s answer]: https://stackoverflow.com/a/24036227/736649
[akashivskyy_s answer]: https://stackoverflow.com/a/24036067/2664437
[here]: https://stackoverflow.com/questions/24036393/fatal-error-use-of-unimplemented-initializer-initcoder-for-class/24036440#24036440
[This link has both the implementations]: http://sketchytech.blogspot.sg/2012/11/instantiate-view-controller-using.html
[This link has code for initiating viewcontroller in the same storyboard]: https://stackoverflow.com/questions/25914744/swift-instantiateviewcontrollerwithidentifier