Unity 無限迴圈滾動列表

阿新 • • 發佈：2020-12-27

Unity 無限滑動列表製作

Unity 無限滾動列表功能，效果，迴圈滾動，並且可以點選互動。
在這裡插入圖片描述
下面展示一些 內聯程式碼片。

public class SlideList : MonoBehaviour,IDragHandler
{
    public static SlideList Instance;
    public  List<RectTransform> itemDataArray = new List<RectTransform>();
    private List<Vector3> 
 standardItemPosition = new List<Vector3>();
    private static float timer = 0;
    public float slideSpeed = 0.5f;
	private void Start()
	{
        Instance = this;

        foreach (RectTransform item in transform.Find("Content"))
		{
            itemDataArray.Add(item);
            standardItemPosition. 
Add(item.localPosition);
        }
	}

	public void HidScrollView()
    {
        this.gameObject.SetActive(false);
    }

    public void OnDrag(PointerEventData eventData)
    {
		
		if (Input.GetAxis("Mouse Y") < 0)
		{
            timer -= Input.GetAxis("Mouse Y") * slideSpeed; 


			DownSlide(timer);

		}
		if (Input.GetAxis("Mouse Y") > 0)
		{
            timer += Input.GetAxis("Mouse Y") * slideSpeed;

			UPSlide(timer);
		}
	
	}
    private bool isSliderDown;

   
    public void UPSlide(float value)
    {

        for (int i = 0; i < itemDataArray.Count; i++)
        {
            if (i > 0)
            {
                value = Mathf.Clamp(value, 0, 1);
                itemDataArray[i].localPosition = Vector3.Lerp(standardItemPosition[i], standardItemPosition[i - 1], value);
            }

            else if (i == 0)
            {
                itemDataArray[i].localPosition = Vector3.Lerp(standardItemPosition[i], standardItemPosition[i] - new Vector3(0, -129, 0), value);
           
            }
        }
        if (value >= 1)
        {
            for (int i = 0; i < itemDataArray.Count - 1; i++)
            {
                RectTransform temp = itemDataArray[i];
                itemDataArray[i] = itemDataArray[i + 1];
                itemDataArray[i + 1] = temp;
            }
            timer = 0;
            itemDataArray[itemDataArray.Count - 1].localPosition = standardItemPosition[standardItemPosition.Count - 1];
        }
    }


    public void DownSlide(float value)
    {

        for (int i = itemDataArray.Count - 1; i >= 0; i--)
        {
            value = Mathf.Clamp(value, 0, 1);
            if (i < itemDataArray.Count - 1)
            {
                itemDataArray[i].localPosition = Vector3.Lerp(standardItemPosition[i], standardItemPosition[i + 1], value);
      
            }
            else if (i == itemDataArray.Count - 1)
            {
                itemDataArray[i].localPosition = Vector3.Lerp(standardItemPosition[i], standardItemPosition[i] + new Vector3(0, -129, 0), value);
            
            }

        }
        if (value >= 1)
        {
            itemDataArray[itemDataArray.Count - 1].localPosition = standardItemPosition[0];
            for (int i = itemDataArray.Count - 1; i > 0; i--)
            {

                RectTransform temp = itemDataArray[i];
                itemDataArray[i] = itemDataArray[i - 1];
                itemDataArray[i - 1] = temp;

            }
            timer = 0;
        }
    }

}

下面展示一些 內聯程式碼片。

public class Item :MonoBehaviour, IBeginDragHandler,IEndDragHandler,IDragHandler,IPointerDownHandler,IPointerUpHandler
{
	public bool isClick;

	public void OnBeginDrag(PointerEventData eventData)
	{
		isClick = false;
	}

	public void OnEndDrag(PointerEventData eventData)
	{
		
	}

	public void OnPointerDown(PointerEventData eventData)
	{
		isClick = true;
	}

	public void OnPointerUp(PointerEventData eventData)
	{
		if (isClick) {
			Debug.Log("點選:"+transform.GetComponentInChildren<Text>());
		}
	}

	void IDragHandler.OnDrag(PointerEventData eventData)
	{
		SlideList.Instance.OnDrag(eventData);

	}
}