How to Stop Hero (Character) Movement in SpriteKit? - iphone

Question

The main function to walk the Hero this function inside Player.Swift I want to stop walking with Touching position.
This function would be running continues inside GameScene.swift
I want to stop my Hero when user tap to the target Position but after stop Hero whenever user tap on new target location hero moves with new position and stop again.
Here is my code:
{
override init() {
let atlas = SKTextureAtlas(named: "characters")
let texture = atlas.textureNamed("player_ft1")
texture.filteringMode = .Nearest
sprite = AnimatedSprite(texture: texture)
// sprite = SKSpriteNode(texture: texture)
super.init()
addChild(sprite)
name = "player"
// 1
var minDiam = min(sprite.size.width, sprite.size.height)
minDiam = max(minDiam-16.0, 4.0)
let physicsBody = SKPhysicsBody(circleOfRadius: minDiam/2.0)
// 2
physicsBody.usesPreciseCollisionDetection = true
// 3
physicsBody.allowsRotation = false
physicsBody.restitution = 1
physicsBody.friction = 0
physicsBody.linearDamping = 0
physicsBody.collisionBitMask = PhysicsCategory.Boundary
physicsBody.collisionBitMask = PhysicsCategory.Boundary | PhysicsCategory.Wall | PhysicsCategory.Water
//physicsBody.dynamic=false
// 4
self.physicsBody = physicsBody
sprite.facingBackAnim = AnimatedSprite.createAnimWithPrifix("player",suffix: "ft")
sprite.facingForwardAnim = AnimatedSprite.createAnimWithPrifix("player",suffix: "bk")
sprite.facingSideAnim = AnimatedSprite.createAnimWithPrifix("player",suffix: "lt")
sprite.runAction(sprite.facingBackAnim)
}
func moveToward(target: CGPoint) {
// _Lastlocation
let targetVector = (target - position).normalized() * 150.0
physicsBody?.velocity = CGVector(point: targetVector)
faceCurrentDirection()
}