egret 示例实战五：随机画圆

1.初始化赋值

//初始化赋值
 this.shape = new egret.Shape();
 this.addChild(this.shape);
 this.drawCircle(Main.instance.stage.stageWidth/2,Main.instance.stage.stageHeight/2);

2.随机画圆

private drawCircle(x,y){
   //随机画圆
    this.shape.graphics.beginFill(0xff0000 + Math.floor(Math.random()*100)* (0xffffff / 100),1);
    console.log('0xffffff / 100 = ' + 0xffffff / 100);
    this.shape.graphics.lineStyle(2,0xff0000 + Math.floor(Math.random()*100)* (0xffffff / 100));
    this.shape.graphics.drawCircle(x,y,Math.random()*50+10);
    this.shape.graphics.endFill();
}

3.添加监听事件随机画圆

private changeGraphics(){
   //添加监听事件画圆
   let shape = this.shape;
   Main.instance.stage.addEventListener(egret.TouchEvent.TOUCH_MOVE,(e:egret.TouchEvent)=>{
      this.drawCircle(e.stageX,e.stageY);
   },this);
}

4.效果