我想在我正在开发的游戏中添加一个分数到我的场景顶部.得分将取决于你持续多久,并将每秒增加一次.我在这里先向您的帮助表示感谢！
import SpriteKit
class easyScene: SKScene {
let scrollBarEasyBottom = SKSpriteNode(imageNamed: "scrollBarEasyBottom")
let scrollBarEasyTop = SKSpriteNode(imageNamed: "scrollBarEasyTop")
let ball = SKSpriteNode(imageNamed: "ball")
var origSBEBpositionX = CGFloat(0)
var origSBETpositionX = CGFloat(0)
var maxSBEBX = CGFloat(0)
var SBEBSpeed = 5
var maxSBETX = CGFloat(0)
var SBETSpeed = 5
var score = 0
var timer: NSTimer?
var scoreText = SKLabelNode(fontNamed: "Kailasa")
override func didMovetoView(view: SKView) {
println("Easy Scene is the location")
self.backgroundColor = UIColor.blackColor()
self.scrollBarEasyBottom.position = CGPoint(x:0,y:270)
self.addChild(self.scrollBarEasyBottom)
self.scrollBarEasyBottom.yScale = 0.2
self.origSBEBpositionX = self.scrollBarEasyBottom.position.x
// end scrollBarEasyBottom
self.scrollBarEasyTop.position = CGPoint(x:20,y:400)
self.addChild(self.scrollBarEasyTop)
self.scrollBarEasyTop.yScale = 0.2
self.origSBETpositionX = self.scrollBarEasyTop.position.x
// end scrollBarEasyTop
self.ball.position = CGPoint(x:40,y:293)
self.addChild(self.ball)
self.ball.yScale = 0.17
self.ball.xScale = 0.17
// end ball
self.maxSBEBX = self.scrollBarEasyBottom.size.width - self.frame.size.width
self.maxSBEBX *= -1
self.maxSBETX = self.scrollBarEasyTop.size.width - self.frame.size.width
self.maxSBETX *= -1
//
self.scoreText.text = "0"
self.scoreText.fontSize = 60
self.scoreText.position = CGPoint(x: CGRectGetMidX(self.frame),y: 500)
self.scoreText.text = String(self.score)
self.addChild(self.scoreText)
timer = NSTimer.scheduledTimerWithTimeInterval(1,target: self,selector: Selector("scoreIncrease"),userInfo: nil,repeats: true)
func scoreIncrease (){
score++
println(score)
}
}
override func update(currentTime: NSTimeInterval){
if self.scrollBarEasyBottom.position.x <= maxSBEBX + 1200 {
self.scrollBarEasyBottom.position.x = self.origSBEBpositionX
}
if self.scrollBarEasyTop.position.x <= maxSBETX + 1200 {
self.scrollBarEasyTop.position.x = self.origSBETpositionX
}
scrollBarEasyBottom.position.x -= CGFloat(self.SBEBSpeed)
scrollBarEasyTop.position.x -= CGFloat(self.SBETSpeed)
// moving bars
var degreeRotation = CDouble(self.SBEBSpeed) * M_PI / 180
self.ball.zRotation -= CGFloat(degreeRotation)
//rotate ball
}
}
运行此代码之后,我总是得到一个“无法识别的选择器发送到实例错误”.
解决方法
你可以使用这样的一个
var timer = NSTimer()
override func viewDidLoad() {
scheduledTimerWithTimeInterval()
}
func scheduledTimerWithTimeInterval(){
// Scheduling timer to Call the function **Countdown** with the interval of 1 seconds
timer = NSTimer.scheduledTimerWithTimeInterval(1,selector: Selector("updateCounting"),repeats: true)
}
func updateCounting(){
NSLog("counting..")
}
Swift 3：
var timer = Timer()
override func viewDidLoad() { // Use for the app's interface
scheduledTimerWithTimeInterval()
}
override func didMove(to view: SKView) { // As part of a game
scheduledTimerWithTimeInterval()
}
func scheduledTimerWithTimeInterval(){
// Scheduling timer to Call the function **Countdown** with the interval of 1 seconds
timer = Timer.scheduledTimer(timeInterval: 1,selector: #selector(self.updateCounting),repeats: true)
}
func updateCounting(){
NSLog("counting..")
}