// CollectionEditorOnInspectorGUI 是一个泛型方法，负责对所有的 CollectionEditor 相关的编辑器进行渲染
// 使用的时候需要在相应的 CollectionEditor 的 OnInspectorGUI() 中 call 这个function
public static void CollectionEditorOnInspectorGUI <T>(SerializedProperty collectionProperty,
string name, T editor, ref bool fold)
where T : Editor
{
//EditorGUI.indentLevel++;
GUILayout.BeginVertical(GUI.skin.box);
fold = EditorGUILayout.Foldout(fold, name + " Collection");
if (fold)
{
EditorGUI.indentLevel++;
for (int i = 0; i < collectionProperty.arraySize; i++)
{
GUILayout.BeginHorizontal();
SerializedProperty elementProperty = collectionProperty.GetArrayElementAtIndex(i);
EditorGUILayout.PropertyField(elementProperty);
if (GUILayout.Button("-", GUILayout.Width(18.0f)))
{
collectionProperty.RemoveElementFromPropertyByIndex(i);
}
GUILayout.EndHorizontal();
}
EditorGUI.indentLevel--;
GUILayout.Space(5.0f);
GUILayout.BeginHorizontal();
GUILayout.FlexibleSpace();
string buttonStr = "Add New " + name;
if (GUILayout.Button(buttonStr, GUILayout.Width(150.0f)))
{
collectionProperty.AddEmptyElementToProperty();
}
buttonStr = "Remove " + name;
if (GUILayout.Button(buttonStr, GUILayout.Width(150.0f)))
{
int index = collectionProperty.arraySize;
collectionProperty.RemoveElementFromPropertyByIndex(index - 1);
}
GUILayout.EndHorizontal();
GUILayout.Space(5.0f);
Rect fullWidthRect = GUILayoutUtility.GetRect(GUIContent.none, GUIStyle.none, GUILayout.Height(60.0f));
DragAndDropAreaGUI(fullWidthRect, CheckEditorTargetType(editor).ToString());
DraggingAndDropping(fullWidthRect, editor);
}
GUILayout.EndVertical();
//EditorGUI.indentLevel--;
}