Pycharm使用qt designer 设计界面,AES加密解密项目实例

pycharm使用qt designer 设计界面,AES加密解密实例

在命令行输入以下命令安装所需包

安装pyqt5：pip install PyQt5
安装qt designer : pip install PyQt5-tools

在pycharm里配置qt designer和uic

在setting>tools>extrnal tools里，点击加号添加外部工具

name设置为py designer,也可自定义。
program路径设置为designer.exe路径，我的是D:\ProgramsForWork\anaconda\Ana\Lib\site-packages\pyqt5_tools\designer.exe。
working directory设置为项目目录，填$ProjectFileDir$。

uic设置方法类似，program填pyuic5.exe的路径，我的是D:\ProgramsForWork\anaconda\Ana\Scripts\pyuic5.exe,
arguments填$FileName$ -o $FileNameWithoutExtension$.py,
working directory填$FileDir$。

设置成功将能在tools>external tools>下看到qt designer和pyuic这两个工具选项

使用qt designer设计一个简单界面

依次点击tools>external tools>qt designer打开designer，

创建一个mainwindow主窗口界面，从左侧选择各种组件添加到窗口中。下面所示图标可以添加信号和槽

保存到项目目录下，命名name.ui，在pycharm里可以看到项目下多了name.ui这个文件

右键该name.ui文件，从external tools选项选择pyuic

经uic处理生成name.py文件

该name.py即刚才设计的界面文件，工具以经帮我们转换成代码了，我们只需做些适当添加，比如给button添加clicked信号和槽函数on_button_clicked()。

		self.push_button_1.clicked.connect(self.on_push_button_1_clicked)
        self.push_button_2.clicked.connect(self.on_push_button_2_clicked)
        self.push_button_3.clicked.connect(self.on_push_button_3_clicked)
	def on_push_button_1_clicked(self):
		...
	def on_push_button_2_clicked(self):
		...

可以看到其格式为self.button.clicked.connect(on_button_clicked)

在init函数里面修改背景颜色 ，也可以在qt designer里面手动改

def __init__(self, parent=None):
    self.setStyleSheet("#MainWindow{background-color: pink}")

AES加密解密文件

安装cryptodome : pip install cryptodome

# aes.py

from Crypto.Cipher import AES
from binascii import b2a_hex, a2b_hex


class PrpCrypt(object):
    def __init__(self, key):
        self.key = key.encode('utf-8')
        self.mode = AES.MODE_CBC

    # 加密函数，如果text不足16位就用空格补足为16位，
    # 如果大于16当时不是16的倍数，那就补足为16的倍数。
    def encrypt(self, text):
        text = text.encode('utf-8')
        cryptor = AES.new(self.key, self.mode, b'0000000000000000')
        # 这里密钥key 长度必须为16（AES-128）,
        # 24（AES-192）,或者32 （AES-256）Bytes 长度
        # 目前AES-128 足够目前使用
        length = 16
        count = len(text)
        if count < length:
            add = (length - count)
            # \0 backspace
            # text = text + ('\0' * add)
            text = text + ('\0' * add).encode('utf-8')
        elif count > length:
            add = (length - (count % length))
            # text = text + ('\0' * add)
            text = text + ('\0' * add).encode('utf-8')
        self.ciphertext = cryptor.encrypt(text)
        # 因为AES加密时候得到的字符串不一定是ascii字符集的，输出到终端或者保存时候可能存在问题
        # 所以这里统一把加密后的字符串转化为16进制字符串
        return b2a_hex(self.ciphertext)

    # 解密后，去掉补足的空格用strip() 去掉
    def decrypt(self, text):
        cryptor = AES.new(self.key, self.mode, b'0000000000000000')
        plain_text = cryptor.decrypt(a2b_hex(text))
        # return plain_text.rstrip('\0')
        return bytes.decode(plain_text).rstrip('\0')


if __name__ == '__main__':
    key = PrpCrypt('ilikechinesebest')  # 初始化密钥
    e = key.encrypt("i am a student,you are a pig")  # 加密
    d = key.decrypt(e)  # 解密
    print("加密:", e)
    print("解密:", d)

简析if _name_ == ‘_main_’:

如果本文件名==执行文件名，就执行以下代码（一般是测试代码），方便调试。而如果本文件作为模块被执行文件调用，执行文件中不会运行下面代码。

界面文件

# gui.py
# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'encrypt.ui'
#
# Created by: PyQt5 UI code generator 5.11.3
#
# WARNING! All changes made in this file will be lost!
#
# Writen By Mr. REDHAT From HUST 

import sys
from PyQt5 import QtCore, QtGui, QtWidgets

import aes


class UiMainWindow(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        super(UiMainWindow, self).__init__(parent)

        self.setObjectName("MainWindow")
        self.resize(800, 600)
        self.setStyleSheet("#MainWindow{background-color: pink}")
        font = QtGui.QFont()
        font.setPointSize(16)
        self.setFont(font)
        self.central_widget = QtWidgets.QWidget(self)
        self.central_widget.setObjectName("central_widget")

        self.label = QtWidgets.QLabel(self.central_widget)
        self.label.setGeometry(QtCore.QRect(20, 90, 111, 31))
        self.label.setFont(font)
        self.label.setObjectName("label")
        self.label_2 = QtWidgets.QLabel(self.central_widget)
        self.label_2.setGeometry(QtCore.QRect(23, 170, 101, 31))
        self.label_2.setFont(font)
        self.label_2.setObjectName("label_2")
        self.label_3 = QtWidgets.QLabel(self.central_widget)
        self.label_3.setGeometry(QtCore.QRect(20, 270, 111, 31))
        self.label_3.setFont(font)
        self.label_3.setObjectName("label_3")
        self.label_4 = QtWidgets.QLabel(self.central_widget)
        self.label_4.setGeometry(QtCore.QRect(20, 390, 111, 31))
        self.label_4.setFont(font)
        self.label_4.setObjectName("label_4")

        self.input_text = QtWidgets.QPlainTextEdit(self.central_widget)
        self.input_text.setGeometry(QtCore.QRect(130, 60, 500, 111))
        self.input_text.setObjectName("input_text")
        self.key_text = QtWidgets.QPlainTextEdit(self.central_widget)
        self.key_text.setGeometry(QtCore.QRect(130, 175, 500, 31))
        self.key_text.setObjectName("key_text")
        self.encrypted_text = QtWidgets.QPlainTextEdit(self.central_widget)
        self.encrypted_text.setGeometry(QtCore.QRect(130, 220, 500, 111))
        self.encrypted_text.setObjectName("encrypted_text")
        self.decrypted_text = QtWidgets.QPlainTextEdit(self.central_widget)
        self.decrypted_text.setGeometry(QtCore.QRect(130, 350, 500, 111))
        self.decrypted_text.setObjectName("decrypted_text")

        self.push_button_1 = QtWidgets.QPushButton(self.central_widget)
        self.push_button_1.setGeometry(QtCore.QRect(660, 175, 81, 31))
        self.push_button_1.setFont(font)
        self.push_button_1.setObjectName("pushButton_1")
        self.push_button_2 = QtWidgets.QPushButton(self.central_widget)
        self.push_button_2.setGeometry(QtCore.QRect(660, 262, 81, 31))
        self.push_button_2.setFont(font)
        self.push_button_2.setObjectName("pushButton_2")
        self.push_button_3 = QtWidgets.QPushButton(self.central_widget)
        self.push_button_3.setGeometry(QtCore.QRect(660, 390, 81, 31))
        self.push_button_3.setFont(font)
        self.push_button_3.setObjectName("pushButton_3")

        self.setCentralWidget(self.central_widget)
        self.menu_bar = QtWidgets.QMenuBar(self)
        self.menu_bar.setGeometry(QtCore.QRect(0, 0, 800, 23))
        self.menu_bar.setObjectName("menu_bar")
        self.setMenuBar(self.menu_bar)
        self.status_bar = QtWidgets.QStatusBar(self)
        self.status_bar.setObjectName("status_bar")
        self.setStatusBar(self.status_bar)

        QtCore.QMetaObject.connectSlotsByName(self)

        _translate = QtCore.QCoreApplication.translate
        self.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.label.setText(_translate("MainWindow", "input:"))
        self.label_2.setText(_translate("MainWindow", "key:"))
        self.label_3.setText(_translate("MainWindow", "encrypted:"))
        self.label_4.setText(_translate("MainWindow", "decrypted:"))
        self.push_button_1.setText(_translate("MainWindow", "encrypt"))
        self.push_button_2.setText(_translate("MainWindow", "decrypt"))
        self.push_button_3.setText(_translate("MainWindow", "quit"))
        self.push_button_1.clicked.connect(self.on_push_button_1_clicked)
        self.push_button_2.clicked.connect(self.on_push_button_2_clicked)
        self.push_button_3.clicked.connect(self.on_push_button_3_clicked)

    def on_push_button_1_clicked(self):
        if str(self.input_text.toPlainText()) and len(str(self.key_text.toPlainText())) == 16:
            key = aes.PrpCrypt(str(self.key_text.toPlainText()))  # 初始化密钥
            e = key.encrypt(str(self.input_text.toPlainText()))  # 加密
            self.encrypted_text.setPlainText(bytes.decode(e))  # 字节码e转utf-8
            print('encrypted!')
        elif len(str(self.key_text.toPlainText())) == 16:
            QtWidgets.QMessageBox.warning(self, "Warning!", 'Please input your text to encrypt!')
        elif str(self.key_text.toPlainText()) and str(self.input_text.toPlainText()):
            QtWidgets.QMessageBox.warning(self, "Warning!", 'The key must be 16bits!')
        elif str(self.input_text.toPlainText()):
            QtWidgets.QMessageBox.warning(self, "Warning!", 'Please enter your key!')
        else:
            QtWidgets.QMessageBox.warning(self, "Warning!", 'Please check the input_text and the key!')

    def on_push_button_2_clicked(self):
        if len(str(self.encrypted_text.toPlainText())) % 32 == 0 and len(str(self.key_text.toPlainText())) == 16:
            key = aes.PrpCrypt(str(self.key_text.toPlainText()))
            try:
                d = key.decrypt(str(self.encrypted_text.toPlainText()))  # 解码
            except Exception as e:
                print(e)
                QtWidgets.QMessageBox.warning(self, "Warning!", 'Appcrash happened! Please check the encrypted and key')		
                # try语句转为异常处理防止程序崩溃
            else:
                self.decrypted_text.setPlainText(d)
        else:
            QtWidgets.QMessageBox.warning(self, "Warning!", 'Incorrect key or encrypted text!')

    def on_push_button_3_clicked(self):
        sys.exit()


if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    window = UiMainWindow()
    window.show()
    sys.exit(app.exec_())

注意Qt里面输入框内容text类型为QString，用.toPlainText()方法获得其text内容后用str()转换类型为string。 当Appcrash发生即程序崩溃时，改为try语句格式转为异常处理防止程序崩溃。

运行效果

run gui.py