在Swift中实例化和呈现viewController

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

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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 . 如果您遇到init(coder:) ，请参考EridB的答案 。

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#3楼

For people using @akashivskyy's answer to instantiate UIViewController and are having the exception: 对于使用@ akashivskyy的答案来实例化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

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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: 此链接具有以下两种实现：

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

/*
 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];