SpriteKit - touchesMoved,瞄准十字准线
SpriteKit - touchesMoved, aim crosshair
我有一个精灵节点和一个十字线节点,我希望当玩家触摸精灵节点并移动十字线时,十字线也会移动。
override func touchesMoved(touches: NSSet, withEvent event: UIEvent) {
for touch: AnyObject in touches {
let location = touch.locationInNode(self)
var body = self.nodeAtPoint(location)
if var name: String = body.name {
if body.name == "aim-button" {
crossHair.position = CGPointMake(crossHair.position.x + 10, crossHair.position.y + 10)
}
}
}
}
十字准线确实会移动,但只能在一个方向上移动,我不知道如何根据 space 触摸移动到的位置(这显然比十字准线小得多)使其准确实际上应该在屏幕上移动)和方向。
for touch: AnyObject in touches {
//Get the current position in scene of the touch.
let location = touch.locationInNode(self)
//Get the previous position in scene of the touch.
let previousLocation = touch.previousLocationInNode(self)
//Calculate the translation.
let translation = CGPointMake(location.x - previousLocation.x, location.y - previousLocation.y)
//Get the current position in scene of the crossHair.
let position = crossHair.position
// Get the bode touched
var body = self.nodeAtPoint(location)
if var name: String = body.name {
if body.name == "aim-button" {
//Set the position of the crosshair to its current position plus the translation.
crossHair.position = CGPointMake(position.x + translation.x * 2, position.y + translation.y * 2)
//Set the position of the body
body.position = location
}
}
}
如果十字准线移动的距离比触摸移动的距离大,只需将平移乘以一个因子(我在上面的示例中使用 2)。
我有一个精灵节点和一个十字线节点,我希望当玩家触摸精灵节点并移动十字线时,十字线也会移动。
override func touchesMoved(touches: NSSet, withEvent event: UIEvent) {
for touch: AnyObject in touches {
let location = touch.locationInNode(self)
var body = self.nodeAtPoint(location)
if var name: String = body.name {
if body.name == "aim-button" {
crossHair.position = CGPointMake(crossHair.position.x + 10, crossHair.position.y + 10)
}
}
}
}
十字准线确实会移动,但只能在一个方向上移动,我不知道如何根据 space 触摸移动到的位置(这显然比十字准线小得多)使其准确实际上应该在屏幕上移动)和方向。
for touch: AnyObject in touches {
//Get the current position in scene of the touch.
let location = touch.locationInNode(self)
//Get the previous position in scene of the touch.
let previousLocation = touch.previousLocationInNode(self)
//Calculate the translation.
let translation = CGPointMake(location.x - previousLocation.x, location.y - previousLocation.y)
//Get the current position in scene of the crossHair.
let position = crossHair.position
// Get the bode touched
var body = self.nodeAtPoint(location)
if var name: String = body.name {
if body.name == "aim-button" {
//Set the position of the crosshair to its current position plus the translation.
crossHair.position = CGPointMake(position.x + translation.x * 2, position.y + translation.y * 2)
//Set the position of the body
body.position = location
}
}
}
如果十字准线移动的距离比触摸移动的距离大,只需将平移乘以一个因子(我在上面的示例中使用 2)。