大佬们解析一下为什么双星号引起来的会报错

Creator 2.x 扩展插件
#1

// Learn TypeScript:

// - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/typescript.html

// - [English] http://www.cocos2d-x.org/docs/creator/manual/en/scripting/typescript.html

// Learn Attribute:

// - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/reference/attributes.html

// - [English] http://www.cocos2d-x.org/docs/creator/manual/en/scripting/reference/attributes.html

// Learn life-cycle callbacks:

// - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/life-cycle-callbacks.html

// - [English] http://www.cocos2d-x.org/docs/creator/manual/en/scripting/life-cycle-callbacks.html

const {ccclass, property} = cc._decorator;

@ccclass

export default class NewClass extends cc.Component {

// @property(cc.Label)

// label: cc.Label = null;

// @property

// text: string = 'hello';

// LIFE-CYCLE CALLBACKS:

// onLoad () {}

start () {

    this.node.on('touchstart',this.onTouchStart,this);

    this.node.on('touchmove',this.onTouchMove,this);

    this.node.on('touchend',this.onTouchCancel,this);

    this.node.on('touchcancel',this.onTouchCancel,this);

}

onTouchStart(e : cc.Event.EventTouch){

}

onTouchMove(e : cc.Event.EventTouch){

    

    let parent : cc.Node = this.node.parent;

    let **pos** : cc.Vec2 = parent.convertToNodeSpaceAR( e.getLocation());

    this.node.setPosition( pos );

    let direction : cc.Vec2 = pos.normalize();

    let maxR = 100 * 0.8;

    let r : number = cc.Vec2.**distance**(pos, cc.v2(0,0))//实际距离

    if( r > maxR)

    {

        pos.x = maxR * direction.x;

        pos.y = maxR * direction.y;

    }

    this.node.setPosition(pos)

}

    // let direction : cc.Vec2 = pos.normalize();

    // let maxR = 100 * 0.8;        

    // let r : number = cc.Vec2.distance(pos, cc.v2(0,0));

    // if( r > maxR)

    // {

    //     pos.x = maxR * direction.x; 

    //     pos.y = maxR * direction.y;

    // }

    // // cc.log("相对位置: " + pos.x + ", " + pos.y);

    // this.node.setPosition( pos);

    

onTouchCancel(){

    this.node.setPosition( cc.v3(0,0,0));

}

update (dt) {

}

}

#2

先好好学习ts语法下，ts哪里有*号

1赞