前提

1、已安装Python（环境Win7+Python 2.7.12 ）

2、已安装插件pyqt4（插件获取路径：https://pan.baidu.com/s/1i50wAOH）

步骤

1、打开py designer制作界面（C:\Python27\Lib\site-packages\PyQt4\designer.exe）。

图1 designer主界面

2、选择Widget窗体形式，点击创建，设置3个Push Button和1个textEdit，并修改控件文本名称和对象名称。

图2 改变文本名称和对象名称的方法

 

图3 设计结果图

3、保存，设置文件名为Example_edit.ui(C:\Python27\Lib\site-packages\PyQt4\Example_edit.ui)

4、使用pyuic编译ui文件为py文件。

c:\Python27\Lib\site-packages\PyQt4>pyuic4 Example_edit.ui > Example_edit.py

c:\Python27\Lib\site-packages\PyQt4>

打开Example_edit.py文件，具体内容如下：

# -*- coding: utf-8 -*-# Form implementation generated from reading ui file 'Example_edit.ui'## Created: Mon May 01 07:32:43 2017#      by: PyQt4 UI code generator 4.8.5## WARNING! All changes made in this file will be lost!from PyQt4 import QtCore, QtGuitry:    _fromUtf8 = QtCore.QString.fromUtf8except AttributeError:    _fromUtf8 = lambda s: sclass Ui_Form(object):    def setupUi(self, Form):        Form.setObjectName(_fromUtf8("Form"))        Form.resize(617, 401)        Form.setWindowTitle(QtGui.QApplication.translate("Form", "Form", None, QtGui.QApplication.UnicodeUTF8))        self.open = QtGui.QPushButton(Form)        self.open.setGeometry(QtCore.QRect(130, 70, 91, 31))        self.open.setText(QtGui.QApplication.translate("Form", "打开", None, QtGui.QApplication.UnicodeUTF8))        self.open.setObjectName(_fromUtf8("open"))        self.save = QtGui.QPushButton(Form)        self.save.setGeometry(QtCore.QRect(300, 70, 81, 31))        self.save.setText(QtGui.QApplication.translate("Form", "保存", None, QtGui.QApplication.UnicodeUTF8))        self.save.setObjectName(_fromUtf8("save"))        self.close = QtGui.QPushButton(Form)        self.close.setGeometry(QtCore.QRect(440, 70, 81, 31))        self.close.setText(QtGui.QApplication.translate("Form", "关闭", None, QtGui.QApplication.UnicodeUTF8))        self.close.setObjectName(_fromUtf8("close"))        self.textEdit = QtGui.QTextEdit(Form)        self.textEdit.setGeometry(QtCore.QRect(90, 130, 441, 241))        self.textEdit.setObjectName(_fromUtf8("textEdit"))        self.retranslateUi(Form)        QtCore.QMetaObject.connectSlotsByName(Form)    def retranslateUi(self, Form):        pass

5、建立test.py文件，编写调用和UI的操作。

#--*-- coding:utf-8--import sysfrom PyQt4 import QtCore, QtGui from Example_edit import Ui_Form class StartQt4(QtGui.QMainWindow):     def __init__(self, parent=None):         QtGui.QWidget.__init__(self, parent)         self.ui = Ui_Form()         self.ui.setupUi(self)         QtCore.QObject.connect(self.ui.open,QtCore.SIGNAL("clicked()"),self.file_dialog)         QtCore.QObject.connect(self.ui.save,QtCore.SIGNAL("clicked()"),self.file_save)     def file_save(self):   #保存文件        from os.path import isfile         if isfile(self.filename):             file = open(self.filename,'w')             file.write(self.ui.textEdit.toPlainText())             file.close()     def file_dialog(self):  #打开文件操作        fd = QtGui.QFileDialog(self)         self.filename = fd.getOpenFileName()         from os.path import isfile         if isfile(self.filename):             text = open(self.filename).read()             self.ui.textEdit.setText(text) if __name__ == "__main__":     app = QtGui.QApplication(sys.argv)     myapp = StartQt4()     myapp.show()     sys.exit(app.exec_())

6、测试结果，结束

c:\Python27\Lib\site-packages\PyQt4>python test.py