https://gitee.com/wolfdong7/guaguale

const {ccclass, property} = cc._decorator;

@ccclass
export default class NewClass extends cc.Component {
    
    // LIFE-CYCLE CALLBACKS:
    
    mask:any = null;
    onLoad () { 
        this.mask = this.node.getChildByName('mask').getComponent(cc.Mask);
        this.node.on(cc.Node.EventType.TOUCH_START,function (e){
            console.log('touch start'); 
            this.commonFunc(e)
        },this);

        this.node.on(cc.Node.EventType.TOUCH_MOVE,(e)=>{
            console.log('touch move'); 
            this.commonFunc(e) 
        },this);
    }

    start () {

    }

    commonFunc (event){
        var point = event.touch.getLocation();
        point = this.node.convertToNodeSpaceAR(point);
        this._addCircle(point);
    }

    _addCircle(point) {
        var graphics = this.mask._graphics;
        console.log("xxxx:",graphics)
        var color = cc.color(0, 0, 0, 255);
        graphics.rect(point.x,point.y,50,30)
        graphics.lineWidth = 2
        graphics.fillColor = color
        //graphics.strokeColor = color
        graphics.fill()
    }

    // update (dt) {}
}

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