使用PyQt5制作界面，網(wǎng)上代碼漫天飛，但是實(shí)現(xiàn)界面與代碼分離的例子不多，自己實(shí)現(xiàn)了一個(gè)，僥幸成功了，特此記錄，害怕自己忘記了，以后也是一個(gè)參考！

1.啟動(dòng)Pycharm，新建一個(gè)工程，然后點(diǎn)擊TOOL-->EXTERNAL TOOL選擇Qt Designer(這個(gè)菜單的配置，請(qǐng)參考另一篇博文：PyQt5的安裝)，啟動(dòng)Qt Designer工具，制作界面。

在界面上放置了一個(gè)EditText，下面放置了兩個(gè)按鈕，一個(gè)按鈕是“打開(kāi)文件”，另一個(gè)按鈕是“保存文件”，功能很簡(jiǎn)單，就是點(diǎn)擊打開(kāi)文件，選擇一個(gè)txt文件，將里面的內(nèi)容顯示到EditText中，而且在界面設(shè)計(jì)的時(shí)候給QEditText設(shè)置對(duì)象名為txt_view，給打開(kāi)文件按鈕設(shè)置對(duì)象名為btn_open，另一個(gè)按鈕設(shè)置名稱(chēng)為btn_save。保存界面為mainUi.ui，在PyCharm界面中，在mainUi.ui文件上單擊鼠標(biāo)右鍵，選擇Extern tool工具中的PyUIC，將mainUI.ui轉(zhuǎn)換為mainUi.py

mainUi.py代碼如下：

mainUi.py代碼如下：

# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'mainUi.ui'
#
# Created by: PyQt5 UI code generator 5.10
#
# WARNING! All changes made in this file will be lost!
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(498, 430)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.verticalLayoutWidget = QtWidgets.QWidget(self.centralwidget)
        self.verticalLayoutWidget.setGeometry(QtCore.QRect(0, 0, 501, 431))
        self.verticalLayoutWidget.setObjectName("verticalLayoutWidget")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.verticalLayoutWidget)
        self.verticalLayout.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout.setObjectName("verticalLayout")
        self.txt_view = QtWidgets.QTextEdit(self.verticalLayoutWidget)
        font = QtGui.QFont()
        font.setFamily("方正姚體")
        font.setPointSize(20)
        self.txt_view.setFont(font)
        self.txt_view.setObjectName("txt_view")
        self.verticalLayout.addWidget(self.txt_view)
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.btn_open = QtWidgets.QPushButton(self.verticalLayoutWidget)
        self.btn_open.setObjectName("btn_open")
        self.horizontalLayout_2.addWidget(self.btn_open)
        self.btn_save = QtWidgets.QPushButton(self.verticalLayoutWidget)
        self.btn_save.setObjectName("btn_save")
        self.horizontalLayout_2.addWidget(self.btn_save)
        self.verticalLayout.addLayout(self.horizontalLayout_2)
        MainWindow.setCentralWidget(self.centralwidget)
        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)
    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.btn_open.setText(_translate("MainWindow", "打開(kāi)文件"))
        self.btn_save.setText(_translate("MainWindow", "保存文件"))

這些代碼都是自動(dòng)生成的，大家可以不需要?jiǎng)印?/code>

import sys
from PyQt5.QtWidgets import QApplication,QMainWindow,QFileDialog
import mainUi
class MainCode(QMainWindow,mainUi.Ui_MainWindow):
	def __init__(self):
		QMainWindow.__init__(self)
		mainUi.Ui_MainWindow.__init__(self)
		self.setupUi(self)
		self.btn_save.clicked.connect(self.on_save)
		self.btn_open.clicked.connect(self.on_open)
	def on_save(self):
		FullFileName,_=QFileDialog.getSaveFileName (self, '文件另存為', r'./','TXT (*.txt)')
		set_text=self.txt_view.toPlainText()
		with open(FullFileName,'wt') as f:
			print(set_text, file = f)
	def on_open(self):
		txtstr=""
		FullFileName, _ = QFileDialog.getOpenFileName(self, '打開(kāi)', r'./', 'TXT (*.txt)')
		with open(FullFileName, 'rt') as f:
			lines=f.readlines()
			for line in lines:
				txtstr=txtstr+line
		self.txt_view.setText(txtstr)
if __name__=='__main__':
	app=QApplication(sys.argv)
	md=MainCode()
	md.show()
	sys.exit(app.exec_())

def on_save(self):
   FullFileName,_=QFileDialog.getSaveFileName (self, '文件另存為', r'./','TXT (*.txt)')
   set_text=self.txt_view.toPlainText()
   with open(FullFileName,'wt') as f:
      print(set_text, file = f)
def on_open(self):
   txtstr=""
   FullFileName, _ = QFileDialog.getOpenFileName(self, '打開(kāi)', r'./', 'TXT (*.txt)')
   with open(FullFileName, 'rt') as f:
      lines=f.readlines()
      for line in lines:
         txtstr=txtstr+line
   self.txt_view.setText(txtstr)