PyQt5 中QDialog值传递

 1 class DbPathDialog(QDialog, Ui_dbpathDialog):
 2 
 3     def __init__(self, parent=None):
 4         super().__init__(parent)
 5         self.setupUi(self) # 窗口界面
 6         self.openfileButton.clicked.connect(self.set_db_path) # 定义了一个openfileButton 点击时将信号发送到self.set_db_path槽函数
 7         self.filename = os.path.join(os.getcwd(), 'Setting.db') # 定义了一个文件的默认地址
 8         if not os.path.exists(self.filename): # 当该路径不存在时调用self.set_db_path()
 9             self.set_db_path()
10         else:
11             self.lineEdit.setText(self.filename) # 当该路径存在时文件路径默认为默认路径
12 
13     @pyqtSlot() # 槽函数，okButton点击时触发
14     def on_okButton_clicked(self):
15         if not os.path.isfile(self.lineEdit.text()): # 判断路径是否是文件
16             info = self.lineEdit.text() + ' is not an available file'
17             prompt = QMessageBox.information(self, '提示', info, QMessageBox.Ok, QMessageBox.Ok)
18             self.set_db_path()
19         else:
20             self.close()
21 
22     def set_db_path(self): 
23         '''打开文件对话框，并把选择文件的路径设置再lineEdit文本输入框上'''
24         self.filename = QFileDialog.getOpenFileName(self,
25                                                r'选择配置文件',
26                                                r'',
27                                                r'db Files(*.db)')
28         if self.filename[0] != '':
29             self.lineEdit.setText(self.filename[0])
30 
31     def db_path(self):
32         return self.lineEdit.text()
33 
34     @staticmethod
35     def get_db_path(parent = None):
36         '''在静态函数中实例化该类，并调用.exec_()函数来显示执行这个对话框。实现值传递'''
37         dialog = DbPathDialog(parent)
38         result = dialog.exec_()
39         path = dialog.db_path()
40         return path

1 path = DbPathDialog.get_db_path()

1 dlg = DbPathDialog()
2 result = dlg.exec_()
3 path = dialog.db_path()
4 dlg.destroy()