如何让sprite节点在“跳转”后返回到同一个地方？

Question

所以我有一个SpriteNode在点击时跳起来向右跳。这一切都很棒但是当它跳跃时它会向右移动。如果我继续点击它会跳出屏幕。

我需要精灵向上跳并向右跳并返回它开始的地方。一种对角线跳跃而不是弧线。我该怎么做？

我的代码：

override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
        /* Called when a touch begins */

        for touch: AnyObject in touches {

            let location = touch.locationInNode(self)

            savior.physicsBody?.velocity = CGVectorMake(0, 0) //pt it returns to?
            savior.physicsBody?.applyImpulse(CGVectorMake(5, 30)) //direction/height that it jumps

            if UIDevice().iPhone6plus {
                savior.physicsBody?.velocity = CGVectorMake(0, 0) //pt it returns to?
                savior.physicsBody?.applyImpulse(CGVectorMake(0, 12)) //direction/height that it jumps

            }
            if UIDevice().iPad2 {
                savior.physicsBody?.velocity = CGVectorMake(0, 0) //pt it returns to?
                savior.physicsBody?.applyImpulse(CGVectorMake(0, 140)) //direction/height that it jumps

            }

        }