ccc 使用let

                //如果不是恩雅，也不在移动过程中，那么移动
                if (!self.hasMoved && !isHold) {
                    var touchLoc = touch.getLocation();
                    self.atkPos = self.node.parent.convertToNodeSpaceAR(touchLoc);
                    let atkDir = cc.pSub(self.atkPos, self.node.position);
                    let targetPos = cc.pAdd( self.node.position, cc.pMult(cc.pNormalize(atkDir), self.atkDist) );
                    //停止播放动画
                    self.node.emit('freeze');
                    self.attackOnTarget(atkDir, targetPos);
                }