Question

在我的代码中，我试图制作一个正方形跟随用户触摸和保持的位置，但是当我尝试编码时，正方形随机随处可见并且不会跟随用户的位置握住他们的手指。有人可以帮我修改这段代码吗？

 override func touchesMoved(touches: Set<NSObject>, withEvent event: UIEvent) {
    var speedOfTouch = CGFloat(30)

    for touch: AnyObject in touches {
        let location = touch.locationInNode(self)

        if location.x < CGRectGetMidX(self.frame) {
            square.position.x <= speedOfTouch
            square.physicsBody?.applyImpulse(CGVector(dx: -10 , dy: 0))



        }
        else {
            square.position.x >= speedOfTouch
            square.physicsBody?.applyImpulse(CGVector(dx: 10, dy: 0))
        }

    }
}

Answer 1

您应该将触摸的位置与广场的当前位置进行比较，而不是中心（我猜测是广场的第一个位置）

物理学：

 override func touchesMoved(touches: Set<NSObject>, withEvent event: UIEvent) {
    var speedOfTouch = CGFloat(30)

    for touch: AnyObject in touches {
        let location = touch.locationInNode(self)

        if location.x < square.position.x {
            square.position.x <= speedOfTouch
            square.physicsBody?.applyImpulse(CGVector(dx: -10 , dy: 0))



        }
        else {
            square.position.x >= speedOfTouch
            square.physicsBody?.applyImpulse(CGVector(dx: 10, dy: 0))
        }

    }
}

没有物理学：

 override func touchesMoved(touches: Set<NSObject>, withEvent event: UIEvent) {
    var speedOfTouch = CGFloat(30)

    for touch: AnyObject in touches {
        let location = touch.locationInNode(self)
        square.position = CGPointMake(location.x, square.position.y)
    }
}

使对象跟随另一个对象x位置

1 个答案: