Maya资产浏览器多列表联动失效问题求助

问题核心原因 #

脚本中itemClicked函数里的if column == index:判断逻辑错误。所有QTreeWidget仅设置了1列（表头隐藏），点击事件返回的column值永远为0，而二级列表的index为1，0≠1导致后续逻辑完全不执行，这就是点击二级列表无响应的根本原因。

修复步骤 #

1. 删除错误的if column == index:判断，或替换为if column == 0（所有列表仅1列，点击列必然为0）。
2. 增加空值判断，避免因currentItem()返回None导致的报错。
3. 增加索引边界检查，防止点击最后一个列表时触发索引越界错误。

修改后的完整代码 #

import os
import maya.cmds as cmds
from PySide2 import QtWidgets, QtGui

class AssetBrowser(QtWidgets.QWidget):
    def __init__(self, asset_dir, parent=None):
        super(AssetBrowser, self).__init__(parent)
        self.asset_dir = asset_dir
        self.levels = 6  # 显示的层级数量
        self.list_titles = ["Type", "Category", "Asset", "LOD", "User", "Scene"]  # 列表标题
        self.file_lists = []  # 存储各层级列表组件的数组
        self.initUI()

    def initUI(self):
        self.setWindowTitle('Asset Browser')
        layout = QtWidgets.QVBoxLayout(self)

        # 添加Logo图片
        image_label = QtWidgets.QLabel()
        pixmap = QtGui.QPixmap(r"D:\WORKSPACE\safeBank\images\safeBank_logoTitle_v001.png")
        image_label.setPixmap(pixmap)
        layout.addWidget(image_label)

        # 项目设置框架
        project_frame = QtWidgets.QFrame()
        project_frame.setFrameShape(QtWidgets.QFrame.StyledPanel)
        project_layout = QtWidgets.QHBoxLayout(project_frame)
        layout.addWidget(project_frame)

        # 设置项目目录按钮
        self.set_project_button = QtWidgets.QPushButton("Set Project")
        self.set_project_button.clicked.connect(self.setProjectDirectory)
        project_layout.addWidget(self.set_project_button)

        # 文件夹路径显示框
        self.folder_path_lineedit = QtWidgets.QLineEdit()
        self.folder_path_lineedit.setReadOnly(True)
        project_layout.addWidget(self.folder_path_lineedit)

        # 列表布局容器
        lists_layout = QtWidgets.QHBoxLayout()
        layout.addLayout(lists_layout)

        # 创建各层级列表框架
        for i in range(self.levels):
            frame = QtWidgets.QFrame()
            frame.setFrameShape(QtWidgets.QFrame.StyledPanel)
            frame_layout = QtWidgets.QVBoxLayout(frame)
            lists_layout.addWidget(frame)

            # 添加列表标题
            title_label = QtWidgets.QLabel(self.list_titles[i])
            frame_layout.addWidget(title_label)

            # 创建树形列表组件
            file_list_widget = QtWidgets.QTreeWidget()
            file_list_widget.setHeaderHidden(True)
            frame_layout.addWidget(file_list_widget)

            # 绑定点击事件，传递当前列表层级索引
            file_list_widget.itemClicked.connect(lambda item, col, index=i: self.itemClicked(item, col, index))

            self.file_lists.append(file_list_widget)

        # 反馈信息栏
        feedback_field = QtWidgets.QLabel()
        layout.addWidget(feedback_field)
        self.feedback_field = feedback_field

        # 初始化项目目录
        self.setProjectDirectory(self.asset_dir)
        self.populateFileLists(self.asset_dir)

    def populateFileLists(self, directory):
        for level, file_list_widget in enumerate(self.file_lists):
            file_list_widget.clear()
            if os.path.exists(directory) and os.listdir(directory):
                self.populateDirectory(directory, file_list_widget)
                # 默认进入第一个子目录，填充下一层级
                directory = os.path.join(directory, os.listdir(directory)[0])
            else:
                break

    def populateDirectory(self, directory, file_list_widget):
        for item_name in sorted(os.listdir(directory)):
            item_path = os.path.join(directory, item_name)
            item = QtWidgets.QTreeWidgetItem(file_list_widget)
            item.setText(0, item_name)
            if os.path.isdir(item_path):
                item.setIcon(0, QtGui.QIcon.fromTheme("folder"))

    def itemClicked(self, item, column, index):
        print(f"点击列表层级: {index}")
        print(f"点击列索引: {column}")

        selected_directory = self.asset_dir
        valid_path = True

        # 构建选中路径
        for level in range(index + 1):
            current_item = self.file_lists[level].currentItem()
            if not current_item:
                valid_path = False
                break
            selected_directory = os.path.join(selected_directory, current_item.text(0))
            print(f"当前构建路径: {selected_directory}")

        # 验证路径并填充下一层级
        if valid_path and os.path.isdir(selected_directory):
            if index + 1 < self.levels:
                self.populateFileList(selected_directory, self.file_lists[index + 1])
                self.feedback_field.setText(selected_directory)
        else:
            print(f"无效路径: {selected_directory}")

    def populateFileList(self, directory, file_list_widget):
        file_list_widget.clear()
        self.populateDirectory(directory, file_list_widget)

    def setProjectDirectory(self, directory=None):
        if directory is None:
            directory = QtWidgets.QFileDialog.getExistingDirectory(self, "选择项目目录")
        if directory:
            self.asset_dir = directory
            self.folder_path_lineedit.setText(directory)
            cmds.workspace(directory, openWorkspace=True)


if __name__ == '__main__':
    import sys
    app = QtWidgets.QApplication.instance() or QtWidgets.QApplication(sys.argv)
    asset_dir = r"D:\WORKSPACE\new_folderStructure\GF\3D\ASSETS"
    asset_browser = AssetBrowser(asset_dir)
    asset_browser.show()
    sys.exit(app.exec_())

内容的提问来源于stack exchange，提问作者Thomas Burton