egret 示例实战六：利用Timer定时器，实现钟表秒针行走效果

1.建立一个圆和一根指针形状

        let circle = new egret.Shape();
        circle.graphics.lineStyle(5,0x000000,1,true);
        circle.graphics.drawCircle(0,0,170);
        circle.graphics.endFill();
        circle.x = Main.instance.stage.stageWidth/2;
        circle.y = Main.instance.stage.stageHeight/2;
        this.addChild(circle);

        this.pointer = new egret.Shape();
        this.pointer.graphics.beginFill(0xFF9900,1);
        this.pointer.graphics.drawRect(0,0,160,5);
        this.pointer.graphics.endFill();
        this.pointer.anchorOffsetY = this.pointer.height/2;
        this.pointer.x = Main.instance.stage.stageWidth/2;
        this.pointer.y = Main.instance.stage.stageHeight/2;
        this.addChild(this.pointer);

2.添加Timer计时器，每秒钟走1格，走60格走完一圈

this.timer = new egret.Timer(1000,0);       this.timer.addEventListener(egret.TimerEvent.TIMER,this.timerFun,this);
this.timer.start();

private timerFun(){
      this.pointer.rotation += 6;
      // console.log('this.pointer.rotation = '+this.pointer.rotation);   
}

3.效果