Question

我有一个问题就是知道如何以tvOS方式制作菜单按钮。我知道UIKit按钮如何聚焦的新方式，但它们之间的导航是在幕后完成的。在SpriteKit中没有FocusEngine支持，所以这里有我的问题，请你们给一个提示或代码片段（最好是swift）如何创建一个SKSpriteNode按钮以及如何实现它以便它可以像一个按钮一样工作？

谢谢

Answer 1

我不确定这是否是最好的方法，但它适用于我和我的tvOS游戏。我使用了手势识别器，我使用左右滑动来改变我的SKSpriteNode纹理。这会产生选定/取消选择按钮的效果。比我简单地使用变量buttonSelected这是bool类型，每当按钮纹理改变时我都会更新它。我使用此变量来决定在单击遥控器后应执行的操作。这是通过buttonAction函数中的简单if语句完成的。我希望这能帮到您。我仍然很新，所以我希望我能清楚地描述它。

class GameScene: SKScene {

var button = SKSpriteNode(imageNamed: "button.png")
var buttonSelected = false

var button2 = SKSpriteNode(imageNamed: "button2.png")
var button2Selected = false

override func didMoveToView(view: SKView) {

    button.position = CGPoint(x: 900, y:100)
    self.addChild(button)

    button2.position = CGPoint(x: 1700, y:100)
    self.addChild(button2)

    // gesture recognizer

    let swipeRight:UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: #selector(GameOverScene.swipedRight(_:)))
    swipeRight.direction = .Right
    view.addGestureRecognizer(swipeRight)

    let swipeLeft:UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: #selector(GameOverScene.swipedLeft(_:)))
    swipeLeft.direction = .Left
    view.addGestureRecognizer(swipeLeft)

    let tapGeneralSelection = UITapGestureRecognizer()
    tapGeneralSelection.addTarget(self, action: #selector(GameScene.buttonAction))
    tapGeneralSelection.allowedPressTypes = [NSNumber (integer: UIPressType.Select.rawValue)]
    self.view!.addGestureRecognizer(tapGeneralSelection)
}

func swipedRight(sender:UISwipeGestureRecognizer){

    let buttonTexture1 = SKTexture(imageNamed: "button2Selected.png")
    button2.runAction(SKAction.setTexture(buttonTexture1))
    button2Selected = true

    let buttonTexture2 = SKTexture(imageNamed: "button.png")
    button.runAction(SKAction.setTexture(buttonTexture2))
    buttonSelected = false
}

func swipedLeft(sender:UISwipeGestureRecognizer){

    let buttonTexture1 = SKTexture(imageNamed: "buttonSelected.png")
    button.runAction(SKAction.setTexture(buttonTexture1))
    buttonSelected = true

    let buttonTexture2 = SKTexture(imageNamed: "button2.png")
    button2.runAction(SKAction.setTexture(buttonTexture2))
    button2Selected = false
}

func buttonAction() {

    if( buttonSelected == true) {
        // do something after button is pressed
    } else if (button2Selected == true) {
       // do something after button2 is pressed
  }
}

}

tvOS SpriteKit应用程序中的菜单按钮

1 个答案: