記事本程序：

# coding:utf-8 import sys from PyQt4.QtGui import QMainWindow from PyQt4.QtGui import QApplication, QAction, QIcon, QFileDialog, QTextEdit from PyQt4.QtCore import SIGNAL, SLOT import codecs import os.path import sys reload(sys) sys.setdefaultencoding("utf-8")class MyWindow(QMainWindow):def __init__(self):QMainWindow.__init__(self)self.setWindowTitle("PyQt")self.resize(300, 200)self.create_menu_bar()self.create_menu_action()self.add_menu_action()self.create_tool_bar()self.add_tool_action()self.maintext = QTextEdit()self.setCentralWidget(self.maintext)def create_menu_bar(self):menu = self.menuBar()self.FileMenu = menu.addMenu(u'文件')self.EditMenu = menu.addMenu(u'編輯')self.SearchMenu = menu.addMenu(u'搜索')def create_menu_action(self):self.OpenMenu = QAction(QIcon('images/open.png'),u'打開', self)self.OpenMenu.setShortcut('Ctrl+O')self.OpenMenu.setStatusTip(u'打開文件')self.OpenMenu.connect(self.OpenMenu, SIGNAL('triggered()'), self.open_file)self.SaveMenu = QAction(QIcon('images/save.png'), u'保存', self)self.SaveMenu.setShortcut('Ctrl+S')self.SaveMenu.setStatusTip(u'保存文件')self.connect(self.SaveMenu, SIGNAL('triggered()'), self.save_file)self.SaveAsMenu = QAction(QIcon('images/saveas.png'), u'另存為', self)self.SaveAsMenu.setShortcut('Ctrl+Alt+S')self.SaveAsMenu.setStatusTip(u'文件另存為')self.connect(self.SaveAsMenu, SIGNAL('triggered()'), self.save_as_file)self.ExitMenu = QAction(QIcon('images/exit.png'), u'退出', self)self.ExitMenu.setShortcut('Ctrl+Q')self.ExitMenu.setStatusTip(u'退出程序')self.connect(self.ExitMenu, SIGNAL('triggered()'), SLOT('close()'))def add_menu_action(self):self.FileMenu.addAction(self.OpenMenu)self.FileMenu.addAction(self.SaveMenu)self.FileMenu.addAction(self.SaveAsMenu)self.FileMenu.addAction(self.ExitMenu)def create_tool_bar(self):self.Open_tool = self.addToolBar(u'打開')self.Save_tool = self.addToolBar(u'保存')self.SaveAs_tool = self.addToolBar(u'另存為')self.Exit_tool = self.addToolBar(u'退出')def add_tool_action(self):self.Open_tool.addAction(self.OpenMenu)self.Save_tool.addAction(self.SaveMenu)self.SaveAs_tool.addAction(self.SaveAsMenu)self.Exit_tool.addAction(self.ExitMenu)def open_file(self):self.filename = QFileDialog.getOpenFileName()if os.path.isfile(self.filename):with codecs.open(self.filename, 'r','utf-8') as f:s = f.read()self.maintext.setText(s)def save_file(self):if 'filename' in dir(self):with codecs.open(self.filename, 'w','utf-8') as f:f.write(self.maintext.toPlainText())else:self.save_as_file()def save_as_file(self):self.filename = QFileDialog.getSaveFileName()with codecs.open(self.filename, 'w','utf-8') as f:f.write(self.maintext.toPlainText())app = QApplication(sys.argv) mywindow = MyWindow() mywindow.show() app.exec_()

說明：

1. 下面代碼可以保證讀取文件中文內容不出現亂碼

import codecs

with codecs.open(self.filename, 'w','utf-8') as f

2. 下面代碼可以保證中文內容寫入不出現亂碼

import sys

reload(sys)

sys.setdefaultencoding("utf-8")

3. 下面判斷保證新文件保存時候采取另存為的方式

if 'filename' in dir(self):

轉載于:https://www.cnblogs.com/lypy/p/6351387.html

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