我一直在尝试跟随快速的教程,我遇到了一些令我非常沮丧的事情,我试图遵循的每一个教程,每当使用SKAction我都不能跟随任何教程,因为我的程序永远不会工作。这种情况发生在MULTIPLE程序中,我无法弄明白。
以下是该计划的代码:
import SpriteKit
import GameplayKit
class GameScene: SKScene{
let player = SKSpriteNode(imageNamed: "playerShip")
override func didMove(to view: SKView) {
let background = SKSpriteNode(imageNamed: "background")
background.size = self.size
background.position = CGPoint(x: self.size.width / 2, y: self.size.height / 2)
background.zPosition = -1
self.addChild(background)
player.setScale(1)
player.position = CGPoint(x: self.size.width / 2, y: self.size.height * 0.2)
player.zPosition = 2
self.addChild(player)
}
func fireBullet(){
let bullet = SKSpriteNode(imageNamed: "bullet")
bullet.setScale(1)
bullet.zPosition = 1
bullet.position = player.position
let moveBullet = SKAction.moveTo(y: self.size.height + bullet.size.height, duration: 1)
let deleteBullet = SKAction.removeFromParent()
let bulletSequence = SKAction.sequence([moveBullet, deleteBullet])
bullet.run(bulletSequence)
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
fireBullet()
}
}
每当我在模拟器中构建并运行程序时,一切都很好,构建成功。然而,每当我点击没有任何反应时,每当我尝试使用SKAction做任何事情时都会发生这种情况。我应该提一下,每次点击时屏幕右下角的FPS都会发生变化,但没有其他事情发生,节点数保持不变,并且屏幕保持不变,子弹没有发射。
以下是我尝试遵循的教程:https://www.youtube.com/watch?v=mvlwZs2ehLU
答案 0 :(得分:4)
我注意到在实例化之后你实际上并没有将bullet
精灵添加到你的场景中。请务必添加addChild(bullet)
。我建议实施类似的东西:
func fireBullet() {
let bullet = SKSpriteNode(imageNamed: "bullet")
bullet.setScale(1)
bullet.zPosition = 1
bullet.position = player.position
addChild(bullet)
let moveBullet = SKAction.moveTo(y: self.size.height + bullet.size.height, duration: 1.0)
let deleteBullet = SKAction.removeFromParent()
let bulletSequence = SKAction.sequence([moveBullet, deleteBullet])
bullet.run(bulletSequence)
}