如何调用SKLabelNode
如何调用SKLabelNode
提问于 2019-07-18 00:18:46
我正在和SpriteKit做一个游戏。
我正在尝试添加一个SKLabelNode (pointsLabel)，如果我没有设置label.isHidden = true，我会让它正常工作。但是，我希望在touchesBegan之前隐藏该标签，但似乎我无法回想起此函数中的LabelNode，因此该标签保持隐藏状态。
我怎么才能让它工作？
代码如下：
class GameScene: SKScene {
private var pointsLabel: SKLabelNode?
override func didMove(to view: SKView) {
pointsLabelShow()
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
// Get label node from scene and store it for use later
self.label = self.childNode(withName: "//pointsLabel") as? SKLabelNode
if let label = self.label {
label.isHidden = false
let fade = SKAction.fadeIn(withDuration: 0.2)
let sequence = SKAction.sequence([fade])
label.run(sequence)
}
}
override func update(_ currentTime: CFTimeInterval) {
/* Called before each frame is rendered */
self.label = self.childNode(withName: "//pointsLabel") as? SKLabelNode
if let label = self.label {
label.position.y = ballHeight + 840
}
func pointsLabelShow() {
let pointsLabel = SKLabelNode(fontNamed: "orkneymedium")
pointsLabel.isHidden = true
pointsLabel.text = "000"
pointsLabel.fontSize = 50
pointsLabel.fontColor = SKColor.white
self.addChild(pointsLabel)
}
}}
回答 1
Stack Overflow用户
发布于 2019-07-18 00:49:53
尝试给SKLabelNode起一个名字，假设是“pointsLabel”
func pointsLabelShow() {
let pointsLabel = SKLabelNode(fontNamed: "orkneymedium")
pointsLabel.isHidden = true
pointsLabel.text = "000"
pointsLabel.fontSize = 50
pointsLabel.name = "pointsLabel"
pointsLabel.fontColor = SKColor.white
self.addChild(pointsLabel)
}如果希望节点仅在被触摸时使用，请在TouchsBegan方法中执行以下操作：
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
let touch = touches.first!
let positionInScene = touch.location(in: self)
let touchedNode = self.atPoint(positionInScene)
if let name = touchedNode.name
{
if name == "pointsLabel"
{
touchedNode.isHidden = false
let fade = SKAction.fadeIn(withDuration: 0.2)
let sequence = SKAction.sequence([fade])
touchedNode.run(sequence)
}
}
}如果希望节点在任何位置都能显示出来，请尝试将该节点放入局部变量中
希望这能有所帮助
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/57080335
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