Qt 文件夹打开的一种样式

样式如下，点击浏览可以打开如下文件夹界面，选择框可以设定在展示框内的路径是否为相对路径

实现效果如下，更改选项框后，文本输入框内的路径会在相对路径和绝对路径之间切换

# -*- coding: utf-8 -*-
import os
from PyQt5.QtCore import QDir
from PyQt5.QtWidgets import QLineEdit, QPushButton, QFileDialog, Qframe, QHBoxLayout, QApplication, QMainWindow, QCheckBox


class MainWindow(QMainWindow):

    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        widget = PathWidget(self)
        self.setCentralWidget(widget)


class PathWidget(Qframe):

    def __init__(self, parent=None):
        super().__init__(parent)
        self.createWidgets()

    def createWidgets(self):
        self.pathLineEdit = QLineEdit(self)

        self.openPathButton = QPushButton(self)
        self.openPathButton.clicked.connect(self.openPathDialog)
        self.openPathButton.setText("浏览")

        self.isAbsolutePath = QCheckBox("是否为相对路径")

        layout = QHBoxLayout()
        layout.addWidget(self.pathLineEdit)
        layout.addWidget(self.openPathButton)
        layout.addWidget(self.isAbsolutePath)
        self.setLayout(layout)

    def openPathDialog(self):
        path = self.getPath(self.pathLineEdit.text())
        if not path:
            return

        self.pathLineEdit.setText(path)
        if path and not self.pathLineEdit.isVisible():
            self.pathLineEdit.setVisible(True)

    def getPath(self, value=""):
        base = "E:"
        fileDir = QDir(base)
        oldPath = fileDir.absoluteFilePath(value) if not os.path.isabs(value) else value
        oldPath = fileDir.cleanPath(oldPath)
        startPath = oldPath if os.path.isdir(oldPath) else fileDir.path()
        path = QFileDialog.getExistingDirectory(None, "选择目录", startPath, QFileDialog.ShowDirsonly | QFileDialog.DontResolveSymlinks)
        if self.isAbsolutePath.checkState():
            path = fileDir.absoluteFilePath(path)
        else:
            path = fileDir.relativeFilePath(path)
        return path


if __name__ == '__main__':
    import sys
    app = QApplication(sys.argv)
    mainWindow = MainWindow()
    mainWindow.show()
    sys.exit(app.exec_())

简单说一下，我们主要用到了QT自带的 fileDir，并且通过 “QFileDialog.getExistingDirectory”该方法去获取一个默认路径为E盘的文件夹选择框