PyQt打开保存对话框的方法和使用详解

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
class filedalogdemo(QWidget):
 def __init__(self,parent=None):
  super(filedalogdemo,self).__init__(parent)
  layout=QVBoxLayout()

  self.btn=QPushButton("加载图片")
  self.btn.clicked.connect(self.getfile)
  layout.addWidget(self.btn)
  self.le=QLabel("")
  layout.addWidget(self.le)
  self.btn1=QPushButton("加载文本文件")
  self.btn1.clicked.connect(self.getfiles)
  layout.addWidget(self.btn1)
  self.text=QTextEdit()
  layout.addWidget(self.text)
  self.setLayout(layout)
  self.setWindowTitle("File Dialog例子")
 def getfile(self):
  fname,_=QFileDialog.getOpenFileName(self,'打开文件',"D:\\","Image files(*.jpg *.gif)")
  self.le.setPixmap(QPixmap(fname))

 def getfiles(self):
  dlg=QFileDialog()
  dlg.setFileMode(QFileDialog.AnyFile)
  dlg.setFilter(QDir.Files)
  if dlg.exec_():
   filenames=dlg.selectedFiles()
   f=open(filenames[0],'r')
   with f:
    data=f.read()
    self.text.setText(data)
if __name__=="__main__":
 app=QApplication(sys.argv)
 win=filedalogdemo()
 win.show()
 sys.exit(app.exec_())