异步移动 2 节点精灵套件

Question

>我有 2 个节点，我想在我的 iPad 上用 2 根手指异步抓取。这是用于移动的代码：

var ninjaMoving = false
var monsterMoving = false
var loc = CGPoint(x: 0.0, y: 0.0)
var prevLoc = CGPoint(x: 0.0, y: 0.0)
override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
    for touch in (touches as! Set<UITouch>) {
        let location = touch.locationInNode(self)
        if !self.nodesAtPoint(location).isEmpty && (self.nodeAtPoint(location).physicsBody?.categoryBitMask == 1 || self.nodeAtPoint(location).physicsBody?.categoryBitMask == 3) {
            if self.nodeAtPoint(location).physicsBody?.categoryBitMask == 1 {
                ninjaMoving = true
            }
            else if self.nodeAtPoint(location).physicsBody?.categoryBitMask == 3 {
                monsterMoving = true
            }
        }
    }
}
override func touchesMoved(touches: Set<NSObject>, withEvent event: UIEvent) {
    for touch in touches as! Set<UITouch> {
        loc = touch.locationInNode(self)
        prevLoc = touch.previousLocationInNode(self)
    }
}
override func touchesEnded(touches: Set<NSObject>, withEvent event: UIEvent) {
    for touch in touches as! Set<UITouch> {
        let location = touch.locationInNode(self)
        if self.nodeAtPoint(prevLoc).physicsBody?.categoryBitMask == 1 {
            ninjaMoving = false
        }
        if self.nodeAtPoint(prevLoc).physicsBody?.categoryBitMask == 3 {
            monsterMoving = false
        }
    }
}
override func update(currentTime: CFTimeInterval) {
    if ninjaMoving {
        var x = playerNinja.position.x + (loc.x - prevLoc.x)
        var y = playerNinja.position.y + (loc.y - prevLoc.y)
        x = max(x, playerNinja.size.width / 2)
        x = min(x, size.width / 2 - playerNinja.size.width)
        y = max(y, playerNinja.size.height / 2)
        y = min(y, size.height - playerNinja.size.height / 2)
        playerNinja.position = CGPointMake(x, y)
    }
    if monsterMoving {
        var x = playerMonster.position.x + (loc.x - prevLoc.x)
        var y = playerMonster.position.y + (loc.y - prevLoc.y)
        x = max(x, self.size.width / 2 + playerMonster.size.width)
        x = min(x, size.width - playerMonster.size.width / 2)
        y = max(y, playerMonster.size.height / 2)
        y = min(y, size.height - playerMonster.size.height / 2)
        playerMonster.position = CGPointMake(x, y)
    }
}

但是我不能同时将一个精灵向左移动，另一个向右移动。有没有办法在精灵套件中做到这一点？

Answer 1

请检查这个问题的答案： spritekit 中的多点触控

这个想法是您应该单独跟踪单个触摸。