斯威夫特& SpriteKit - 如何在GameScene中显示警报视图 [英] Swift & SpriteKit - How to present alert view in GameScene

问题描述

我需要帮助在游戏场景中显示警报视图。我目前正在努力这样做，因为GameScene.Swift不是标准的ViewController。如果它有帮助我需要这样做，因为我需要用户输入一个值，该值用作我游戏中球Sprite Kit Node的坐标。输入只是一个标准整数，所以这不是问题。我也欢迎任何其他关于如何通过警报视图执行此操作的想法。

I need help presenting an alert view in the game scene. Im currently struggling to do so as GameScene.Swift isnt a standard ViewController. If it helps I need to do so as I need the user to input a value which is used as a coordinate for the ball Sprite Kit Node in my game. The input is only a standard integer so that isnt an issue. Any other idea of how I can do this which isnt through an alert view is also welcome.

override func viewWillLayoutSubviews() {
    super.viewWillLayoutSubviews()

    let view = self.view as! SKView

    if view.scene == nil {

        view.showsFPS = false
        view.showsNodeCount = false

        let gameScene = GameScene(size: view.bounds.size)
        gameScene.scaleMode = SKSceneScaleMode.AspectFill
        view.presentScene(gameScene)
    }


}

这是在GameViewController文件中

That is in the GameViewController file

    var vc : GameViewController!



override init(size: CGSize) {
    super.init(size: size)

    let alertController = UIAlertController(title: "Bll Starting Position", message: "Please Enter a X Coordinate Value IN Range 0 to 345 ", preferredStyle: .Alert)
    alertController.addTextFieldWithConfigurationHandler { (textField) in
        textField.placeholder =  "Value Must Be In Range 0 To 345"
        textField.autocapitalizationType = UITextAutocapitalizationType.None
        textField.autocorrectionType = UITextAutocorrectionType.No
        textField.clearsOnBeginEditing = true
        textField.clearsOnInsertion = true
        textField.clearButtonMode = UITextFieldViewMode.Always
        let cancelBtn = UIAlertAction(title: "Cancel", style: .Cancel, handler: nil)
        let confirmBtn = UIAlertAction(title: "Confirm", style: .Default, handler: { (confirmView) in
            if let field = alertController.textFields![0] as? UITextField {

            }
        })
        alertController.addAction(confirmBtn)
        alertController.addAction(cancelBtn)
        self.vc.presentViewController(alertController, animated: true, completion: nil)

    }

谢谢

推荐答案

可能有以下选项：

1）快速解决方案。不要使用 UIAlertController ，使用 UIAlertView 。像那样：

1) Quick solution. Do not use UIAlertController, use UIAlertView. Like that:

alert.show()

然而， UIAlertView 已被弃用，因此依赖它并不安全。

However, UIAlertView is deprecated so it's not quite safe to rely on it.

2）更好的解决方案。使 SKScene 子类保持对用于显示场景的视图控制器的引用，并在创建场景时为其分配视图控制器：

2) A better solution. Make your SKScene subclass hold a reference to the view controller which you use to present the scene and when you create the scene assign it the view controller:

myScene.viewController = self

然后你可以使用它。

self.viewController.presentViewController(alertController, animated: true, completion: nil)

这篇关于斯威夫特& SpriteKit - 如何在GameScene中显示警报视图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！