protected override AdvancedDropdownItem BuildRoot()
{
if (_tempGuids == null)
{
_tempGuids = new HashSet <string>();
}
_tempGuids.Clear();
string[] sourceAssetSearchPaths = new[] { "Assets" };
_tempGuids.UnionWith(AssetDatabase.FindAssets($"t:{_assetReferenceDropdownState.AssetType.Name}", sourceAssetSearchPaths));
var root = new AssetReferenceDropdownFolderItem("Assets", "Assets", true);
string[] assetGuids = new List <string>(_tempGuids).ToArray();
for (int i = 0; i < assetGuids.Length; i++)
{
string assetPath = AssetDatabase.GUIDToAssetPath(assetGuids[i]);
var assetItem = new AssetReferenceDropdownAssetItem(assetPath, System.IO.Path.GetFileName(assetPath));
//找到父节点
AssetReferenceDropdownFolderItem parent = GetParentDropdownItem(root, assetItem);
if (parent == null)
{
parent = CreateParentDropdownItem(root, assetItem);
}
parent.AddAsset(assetItem);
assetItem.ParentFolder = parent;
}
return(root);
}
protected override void ItemSelected(AdvancedDropdownItem item)
{
base.ItemSelected(item);
if (item is AssetReferenceDropdownAssetItem)
{
AssetReferenceDropdownAssetItem assetReferenceDropdownItem = item as AssetReferenceDropdownAssetItem;
if (_assetReferenceDropdownState != null && _assetReferenceDropdownState.Property != null)
{
_assetReferenceDropdownState.Property.objectReferenceValue =
AssetDatabase.LoadAssetAtPath <UnityEngine.Object>(assetReferenceDropdownItem.AssetPath);
_assetReferenceDropdownState.Property.serializedObject.ApplyModifiedProperties();
}
}
}
/// <summary>
/// 加Asset
/// </summary>
/// <param name="child"></param>
public void AddAsset(AssetReferenceDropdownAssetItem child)
{
_assetItems.Add(child);
AddChild(child);
}
/// <summary>
/// 获取父节点
/// </summary>
/// <param name="root">根结点</param>
/// <param name="child">子节点</param>
/// <returns></returns>
private AssetReferenceDropdownFolderItem GetParentDropdownItem(AssetReferenceDropdownFolderItem root, AssetReferenceDropdownAssetItem child)
{
return(GetParentDropdownItem(root, child.FolderPath));
}
private AssetReferenceDropdownFolderItem CreateParentDropdownItem(AssetReferenceDropdownFolderItem root, AssetReferenceDropdownAssetItem child)
{
string childFolderPath = child.FolderPath;
//获取child的递进式父级文件夹相对路径
string[] childProgressiveAssetFolderPath = PathUtility.GetProgressiveAssetFolderPath(childFolderPath);
AssetReferenceDropdownFolderItem lastParent = root;
for (int i = 0; i < childProgressiveAssetFolderPath.Length; i++)
{
AssetReferenceDropdownFolderItem advancedDropdownItem = GetParentDropdownItem(lastParent, childProgressiveAssetFolderPath[i]);
if (advancedDropdownItem == null)
{
var parent = new AssetReferenceDropdownFolderItem(childProgressiveAssetFolderPath[i], false);
lastParent.AddFolder(parent);
lastParent = parent;
}
else
{
lastParent = advancedDropdownItem;
}
}
return(lastParent);
}