如何在Swift中过渡场景 [英] How to transition scenes in Swift

问题描述

在Objective-C中，使用Sprite-Kit，我会成功使用Objective-C中的以下代码来调出新场景

In Objective-C, using Sprite-Kit, I would successfully use something like the following code in Objective-C to bring up a new scene

if ([touchedNode.name  isEqual: @"Game Button"]) {
        SKTransition *reveal = [SKTransition revealWithDirection:SKTransitionDirectionDown duration:1.0];
        GameScene *newGameScene = [[GameScene alloc] initWithSize: self.size];
        //  Optionally, insert code to configure the new scene.
        newGameScene.scaleMode = SKSceneScaleModeAspectFill;
        [self.scene.view presentScene: newGameScene transition: reveal];
    }

在尝试将我的简单游戏移植到Swift时，到目前为止，我有这个工作...

In trying to port my simple game to Swift, so far I have this working...

for touch: AnyObject in touches {
        let touchedNode = nodeAtPoint(touch.locationInNode(self))
        println("Node touched: " + touchedNode.name);
        let touchedNodeName:String = touchedNode.name

        switch touchedNodeName {
        case "Game Button":
            println("Put code here to launch the game scene")

        default:
            println("No routine established for this")
        }

但是我不知道要写什么代码来实际转换到另一个场景。
问题：

But I do not know what code to write to actually transition to another scene. Question(s):

1. 有人可以提供一个使用Swift的SKTransition的例子吗？


2. 您是否通常会创建另一个文件以将其他场景代码放入另一个场景中，假设您将使用Objective-C，或者是否有关于使用Swift的内容，这意味着我应该以不同的方式处理它？<​​/ li>
   

1. Can someone please provide an example of using SKTransition with Swift?
2. Would you normally create another "file" to put the other scene code in for the other scene, assuming you would have under Objective-C, or is there something about using Swift that means I should approach it differently?

谢谢

推荐答案

开始关于你的第二个问题，这取决于你。如果您愿意，您可以继续遵循Objective-C约定，即每个文件只有一个类，尽管这不是必需的，也不在Objective-C中。话虽这么说，如果你有几个紧密相关的类，但不是由很多代码组成，将它们分组在一个文件中是不合理的。只做正确的事情，不要在一个文件中制作大量的代码。

To start with your second question, it's kind of up to you. If you wish to, you can continue to follow the Objective-C convention of having one class per file, although this isn't a requirement, and wasn't in Objective-C either. That being said, if you have a couple of classes that are tightly related, but aren't made up of much code, it wouldn't be unreasonable to have them grouped in a single file. Just do what feels right, and don't make a huge blob of code in a single file.

那么你的第一个问题......是的，你有一个好的处理它已经。基本上，从你到达的地方，你需要通过它的大小创建GameScene的实例：初始化器。从那里，你只需设置属性并调用present。

Then for your first questions... Yes, you had a good deal of it already. Basically, from where you got up to, you need to create the instance of GameScene through its size: initializer. From there, you just set the properties and call present.

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    super.touchesBegan(touches, withEvent: event)

    guard let location = touches.first?.locationInNode(self),
        let scene = scene,
        nodeAtPoint(location) == "Game Button" else {
        return
    }

    let transition = SKTransition.reveal(
        with: .down, 
        duration: 1.0
    )

    let nextScene = GameScene(size: scene.size)
    nextScene.scaleMode = .aspectFill

    scene.view?.presentScene(nextScene, transition: transition)
}

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