ScrollRect滑动优化(二)--动态创建Item列表

首先是效果图:

单个item的

每个item的位置排序根据:

    public static Vector2 GetPosByIndex(int index)    {  //宽度都为75,需要和Layout Element配合使用        return new Vector2(0, -75 * index);    }

通过资源载入的item,这个只是生成了GameObject,还咩有对其进行位置调整

    static GameObject _downloadItem;    static GameObject downloadItem    {        get        {            if (_downloadItem == null)                _downloadItem = GameObject.Instantiate(Resources.Load("offlineMapItem")) as GameObject;            return _downloadItem;        }    }

对item限制高宽,位置的调整

    public static void SetMapDataItemView(MapDataItem item, GameObject root, Vector2 pos)    {           RectTransform rt = GameObject.Instantiate(downloadItem, root.transform).transform as RectTransform;        rt.anchoredPosition = pos;        rt.offsetMax = new Vector2(0, rt.offsetMax.y);        rt.offsetMin = new Vector2(0, rt.offsetMin.y);                rt.localScale = Vector3.one;        rt.GetComponent<OfflineMapItem>().Show(item);//进行每个item的数据绑定    }

开始创建item

        public void Test() {            int mainIndex = 0;            foreach (var item in downloadedList)            {                MapDownloadHelper.SetMapDataItemView(item, mainRoot,GetPosByIndex(mainIndex));                mainIndex++;            }        }

单个Item的数据类

public class OfflineMapItem : MonoBehaviour{    public Text mTitle;    public Text mSize;    public Button mDownloadButton;    public Button mDeletedButton;    public Slider mProgress;    MapDataItem data;    private bool isDownload = false;    public void Show(MapDataItem item)    {        data = item;        mTitle.text = data.getName();        mSize.text = data.getSize();        mDownloadButton.onClick.AddListener(OnDownloadClick);        mDeletedButton.onClick.AddListener(OnDeletedClick);      }