 
                                    private _acceleration = 0.1;//加速度

    public startRunning() {
        console.log("startr")
        this._isMove = true;
        this._speed = 0.2;
        this._acceleration = 0.2;
    }
    public stopRunning() {
        console.log("stop")
        this._acceleration = -0.2;
        //this._isMove = false;
    }
 this._speed =  this._speed + this._acceleration * dt;
            if(this._speed>this.maxSpeed){
                this._speed = this.maxSpeed;
            }
            if(this._speed < 0.01){
                this._isMove = false;
            }站长微信:xiaomao0055
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