swift SpriteKit : TouchesMoved doesn't update when finger stops and camera

Question

我有一个游戏，玩家 move 到一个触摸点(如果触摸 move 则更新目的地)。一切正常，直到相机 move 而触摸不动(手指停留在屏幕上，因此既不调用 touchMoved 也不调用 touchesEnded)播放器 move 到正确的位置与他开始的地方有关，但与 move 的摄像机无关。 (我不想将位置保存在相机的引用系中..如果这样可以的话，因为在屏幕的一侧点击一下就会 move pl直到世界尽头。)

这是代码的骨架:

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    for touch in touches {            
        location = touch.location(in: self)            
        player.goto = location
        player.moving = true                
}}

override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
    for touch in touches {       
        let location = touch.location(in: self)       
         player.goto = location
         player.moving = true 
}}

override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
    for touch in touches {
        let location = touch.location(in: self)
         player.goto = location
         player.moving = true            
}}   

override func update(_ currentTime: CFTimeInterval) {
    if player.position.x > w_screen/2 && player.position.x < (lab.size.width-w_screen/2) {
        cameranode.position.x = player.position.x
    }

    if player.moving == true {
        v = CGVector(dx: player.goto.x-player.position.x, dy: player.goto.y-player.position.y)
        d = sqrt(v.dx*v.dx + v.dy*v.dy)
        vel = 400*atan(d/20)/1.57
        if vel>1 { player.physicsBody!.velocity = CGVector(dx: v.dx*vel/d, dy: v.dy*vel/d) } else {
            player.moving = false
            player.physicsBody!.velocity = CGVector.zero
}}

如有任何帮助，我们将不胜感激。

Answer 1

if player.position.x > w_screen/2 && player.position.x < (lab.size.width-w_screen/2) {
        cameranode.position.x = player.position.x
    }

这就是为什么相机没有 move 到你想要的位置，你正在将你的相机 move 到 player.position.x，但你永远不会更新你的 goto 位置。

只需考虑相机 move 多少并相应地调整 goto。

if player.position.x > w_screen/2 && player.position.x < (lab.size.width-w_screen/2) {

        let camShiftX = player.position.x - cameranode.position.x
        let camShiftY = player.position.y - cameranode.position.y

        cameranode.position.x = player.position.x
        player.goto.x += camShiftX
        player.goto.y += camShiftY

    }