PyQt5打开文件对话框QFileDialog实例代码

本文研究的主要是PyQt5打开文件对话框QFileDialog的代码示例，具体如下。

单个文件打开 QFileDialog.getOpenFileName() 

多个文件打开 QFileDialog.getOpenFileNames() 

文件夹选取 QFileDialog.getExistingDirectory() 

文件保存 QFileDialog.getSaveFileName()

实例代码：

1. from PyQt5 import QtWidgets
2. from PyQt5.QtWidgets import QFileDialog
3.  
4. class MyWindow(QtWidgets.QWidget):
5.   def __init__(self):
6.     super(MyWindow,self).__init__()
7.     self.myButton = QtWidgets.QPushButton(self)
8.     self.myButton.setObjectName("myButton")
9.     self.myButton.setText("Test")
10.     self.myButton.clicked.connect(self.msg)
11.  
12.   def msg(self):
13.     directory1 = QFileDialog.getExistingDirectory(self,
14.                   "选取文件夹",
15.                   "./")                 #起始路径
16.     print(directory1)
17.  
18.     fileName1, filetype = QFileDialog.getOpenFileName(self,
19.                   "选取文件",
20.                   "./",
21.                   "All Files (*);;Text Files (*.txt)")  #设置文件扩展名过滤,注意用双分号间隔
22.     print(fileName1,filetype)
23.  
24.     files, ok1 = QFileDialog.getOpenFileNames(self,
25.                   "多文件选择",
26.                   "./",
27.                   "All Files (*);;Text Files (*.txt)")
28.     print(files,ok1)
29.  
30.     fileName2, ok2 = QFileDialog.getSaveFileName(self,
31.                   "文件保存",
32.                   "./",
33.                   "All Files (*);;Text Files (*.txt)")
34.  
35. if __name__=="__main__": 
36.   import sys 
37.  
38.   app=QtWidgets.QApplication(sys.argv) 
39.   myshow=MyWindow()
40.   myshow.show()
41.   sys.exit(app.exec_())