我正试图在spritkit
中进行一个游戏,却不知道如何才能像一个泛手势识别器一样将球左右拖动到屏幕上。
import UIKit
import SpriteKit
class GameScene: SKScene,SKPhysicsContactDelegate {
var ball = SKShapeNode()
let slidePlayer = UIPanGestureRecognizer()
override func didMoveToView(view: SKView) {
ball = SKShapeNode(circleOfRadius: 15)
ball.position = CGPointMake(self.frame.size.width/2, 500)
ball.fillColor = SKColor.purpleColor()
self.addChild(ball)
slidePlayer.addTarget(ball, action: "slide")
self.view?.addGestureRecognizer(slidePlayer)
}
func slide(){
print("slide")
}
}
最佳答案
下面是playButton的示例代码,我在屏幕上左右拖动它。
import SpriteKit
class GameScene: SKScene {
let playButton = SKSpriteNode(imageNamed: "play_unpresed")
var fingureIsOnNinja = false
let playCategoryName = "play"
override func didMoveToView(view: SKView) {
addPlayButton()
}
func addPlayButton(){
playButton.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame))
playButton.xScale = 0.2
playButton.yScale = 0.2
playButton.name = playCategoryName //give it a category name
self.addChild(playButton)
}
override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
/* Called when a touch begins */
for touch in (touches as! Set<UITouch>){
let location = touch.locationInNode(self)
if self.nodeAtPoint(location) == self.playButton {
fingureIsOnNinja = true //make this true so it will only move when you touch it.
}
}
}
override func touchesMoved(touches: Set<NSObject>, withEvent event: UIEvent) {
if fingureIsOnNinja {
if let touch = touches.first as? UITouch {
let touchLoc = touch.locationInNode(self)
let prevTouchLoc = touch.previousLocationInNode(self)
let ninja = self.childNodeWithName(playCategoryName) as! SKSpriteNode
var newYPos = playButton.position.y + (touchLoc.y - prevTouchLoc.y)
var newXPos = playButton.position.x + (touchLoc.x - prevTouchLoc.x)
newYPos = max(newYPos, playButton.size.height / 2)
newYPos = min(newYPos, self.size.height - playButton.size.height / 2)
newXPos = max(newXPos, playButton.size.width / 2)
newXPos = min(newXPos, self.size.width - playButton.size.width / 2)
playButton.position = CGPointMake(newXPos, newYPos) //set new X and Y for your sprite.
}
}
}
}
希望能有所帮助。
您可以按照THIS的基本教程在
SpriteKit
中进行触摸。关于swift - Spritekit中的Pan Gesture Recognizer移动对象,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/31889842/