自制滑动块滑动界面

1、新建组件Scroll View，调整适合大小，修改组件参数

（垂直滑动，取消自带水平，垂直滑动块）

2、新建Slider组件，调整大小及组件参数

 3、编写脚本

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

public class ScrollViewManager : MonoBehaviour
{
    private Slider m_Slider;
    private RectTransform content;
    private RectTransform m_Transform;

    private void Start()
    {
        m_Slider = transform.Find("Slider").GetComponent<Slider>();
        content = transform.Find("Viewport/Content").GetComponent<RectTransform>();
        m_Transform = GetComponent<RectTransform>();

        //设置滑动条最大距离
        float maxValue = content.sizeDelta.y - m_Transform.sizeDelta.y;

        m_Slider.minValue = 0;
        m_Slider.maxValue = maxValue;

        //滑动条赋值滑动显示界面位置
        m_Slider.onValueChanged.AddListener(delegate (float value)
        {
            content.anchoredPosition = new Vector2(0, m_Slider.value);  
        });
    }

    private void Update()
    {

        m_Slider.value = content.anchoredPosition.y;
      
    }
}