UGUI_创建旋转物体，使用Slider控制小球旋转速度

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;

 public class Player : MonoBehaviour {
     public float speed = 50f;
     // Use this for initialization
     void Start () {

     }

     // Update is called once per frame
     void Update () {
         transform.Rotate(Vector3.up,speed *Time.deltaTime);
     }
     public void ChangeSpeed(float newSpeed)
     {
         this.speed = newSpeed;
     }
 }

player空物体，挂载player脚本；

Canvas下Slider，OnValueChanged 事件处理：  Player物体+（player脚本下的）ChangeSpeed方法。