基于PyQt5如何完成PDF拆分功能

本篇内容主要讲解“基于PyQt5如何完成PDF拆分功能”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“基于PyQt5如何完成PDF拆分功能”吧!

PyQt是Qt框架的Python语言实现，是最强大的GUI库之一。PyQt提供了一个设计良好的窗口控件集合，具有更方便的操作性。学过VB的同学会知道，相比与VB的使用，在界面设计上元素更丰富。

先看界面：

 一、界面PdfC.ui可参考上文如何实现，程序代码如下：

import osfrom PyQt5 import QtCore, QtGui, QtWidgetsimport  base64from return_png import img as retu  # 引入img变量，赋别名为pdf_cf class Ui_PdfC(object):    def setupUi(self, PdfC):        tmp = open('return.png', 'wb')  # 创建临时的文件        tmp.write(base64.b64decode(retu))  # 把这个one图片解码出来，写入文件中去。        tmp.close()        PdfC.setObjectName("PdfC")        PdfC.setWindowModality(QtCore.Qt.NonModal)        PdfC.resize(1400, 814)        PdfC.setMinimumSize(QtCore.QSize(1400, 814))        PdfC.setMaximumSize(QtCore.QSize(1400, 814))        palette = QtGui.QPalette()        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Base, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Window, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Base, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Window, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Base, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Window, brush)        PdfC.setPalette(palette)        self.Reback = QtWidgets.QToolButton(PdfC)        self.Reback.setGeometry(QtCore.QRect(10, 10, 51, 41))        palette = QtGui.QPalette()        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Button, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.ToolTipBase, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Button, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.ToolTipBase, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Button, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.ToolTipBase, brush)        self.Reback.setPalette(palette)        icon = QtGui.QIcon()        icon.addPixmap(QtGui.QPixmap("return.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)        self.Reback.setIcon(icon)        self.Reback.setIconSize(QtCore.QSize(100, 100))        self.Reback.setAutoRaise(True)        self.Reback.setObjectName("Reback")        self.label = QtWidgets.QLabel(PdfC)        self.label.setGeometry(QtCore.QRect(88, 8, 171, 41))        font = QtGui.QFont()        font.setFamily("微软雅黑")        font.setPointSize(16)        font.setBold(True)        font.setWeight(75)        self.label.setFont(font)        self.label.setObjectName("label")        self.frame = QtWidgets.QFrame(PdfC)        self.frame.setGeometry(QtCore.QRect(20, 60, 1351, 161))        palette = QtGui.QPalette()        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Base, brush)        brush = QtGui.QBrush(QtGui.QColor(245, 255, 250))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Window, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Base, brush)        brush = QtGui.QBrush(QtGui.QColor(245, 255, 250))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Window, brush)        brush = QtGui.QBrush(QtGui.QColor(245, 255, 250))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Base, brush)        brush = QtGui.QBrush(QtGui.QColor(245, 255, 250))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Window, brush)        self.frame.setPalette(palette)        self.frame.setAutoFillBackground(True)        self.frame.setFrameShape(QtWidgets.QFrame.Box)        self.frame.setFrameShadow(QtWidgets.QFrame.Plain)        self.frame.setLineWidth(1)        self.frame.setMidLineWidth(0)        self.frame.setObjectName("frame")        self.scwd = QtWidgets.QPushButton(self.frame)        self.scwd.setGeometry(QtCore.QRect(570, 30, 191, 61))        palette = QtGui.QPalette()        brush = QtGui.QBrush(QtGui.QColor(0, 217, 159))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Button, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Text, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.ButtonText, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255, 128))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.PlaceholderText, brush)        brush = QtGui.QBrush(QtGui.QColor(0, 217, 159))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Button, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Text, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.ButtonText, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255, 128))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.PlaceholderText, brush)        brush = QtGui.QBrush(QtGui.QColor(0, 217, 159))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Button, brush)        brush = QtGui.QBrush(QtGui.QColor(120, 120, 120))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Text, brush)        brush = QtGui.QBrush(QtGui.QColor(120, 120, 120))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.ButtonText, brush)        brush = QtGui.QBrush(QtGui.QColor(0, 0, 0, 128))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.PlaceholderText, brush)        self.scwd.setPalette(palette)        font = QtGui.QFont()        font.setFamily("微软雅黑")        font.setPointSize(16)        font.setBold(True)        font.setWeight(75)        self.scwd.setFont(font)        self.scwd.setAutoFillBackground(True)        self.scwd.setAutoDefault(False)        self.scwd.setDefault(False)        self.scwd.setFlat(True)        self.scwd.setObjectName("scwd")        self.label_2 = QtWidgets.QLabel(self.frame)        self.label_2.setGeometry(QtCore.QRect(620, 100, 131, 21))        font = QtGui.QFont()        font.setFamily("微软雅黑")        self.label_2.setFont(font)        self.label_2.setObjectName("label_2")        self.frame_2 = QtWidgets.QFrame(PdfC)        self.frame_2.setGeometry(QtCore.QRect(1050, 280, 321, 301))        palette = QtGui.QPalette()        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Base, brush)        brush = QtGui.QBrush(QtGui.QColor(245, 255, 250))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Window, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Base, brush)        brush = QtGui.QBrush(QtGui.QColor(245, 255, 250))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Window, brush)        brush = QtGui.QBrush(QtGui.QColor(245, 255, 250))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Base, brush)        brush = QtGui.QBrush(QtGui.QColor(245, 255, 250))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Window, brush)        self.frame_2.setPalette(palette)        self.frame_2.setAutoFillBackground(True)        self.frame_2.setFrameShape(QtWidgets.QFrame.NoFrame)        self.frame_2.setFrameShadow(QtWidgets.QFrame.Plain)        self.frame_2.setLineWidth(1)        self.frame_2.setMidLineWidth(0)        self.frame_2.setObjectName("frame_2")        self.label_3 = QtWidgets.QLabel(self.frame_2)        self.label_3.setGeometry(QtCore.QRect(20, 20, 191, 31))        font = QtGui.QFont()        font.setFamily("微软雅黑")        font.setPointSize(14)        font.setBold(False)        font.setWeight(50)        self.label_3.setFont(font)        self.label_3.setObjectName("label_3")        self.xzwd = QtWidgets.QPushButton(self.frame_2)        self.xzwd.setGeometry(QtCore.QRect(30, 190, 271, 61))        palette = QtGui.QPalette()        brush = QtGui.QBrush(QtGui.QColor(0, 217, 159))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Button, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Text, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.ButtonText, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255, 128))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.PlaceholderText, brush)        brush = QtGui.QBrush(QtGui.QColor(0, 217, 159))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Button, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Text, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.ButtonText, brush)        brush = QtGui.QBrush(QtGui.QColor(255, 255, 255, 128))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.PlaceholderText, brush)        brush = QtGui.QBrush(QtGui.QColor(0, 217, 159))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Button, brush)        brush = QtGui.QBrush(QtGui.QColor(120, 120, 120))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Text, brush)        brush = QtGui.QBrush(QtGui.QColor(120, 120, 120))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.ButtonText, brush)        brush = QtGui.QBrush(QtGui.QColor(0, 0, 0, 128))        brush.setStyle(QtCore.Qt.SolidPattern)        palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.PlaceholderText, brush)        self.xzwd.setPalette(palette)        font = QtGui.QFont()        font.setFamily("微软雅黑")        font.setPointSize(14)        font.setBold(True)        font.setWeight(75)        self.xzwd.setFont(font)        self.xzwd.setAutoFillBackground(True)        self.xzwd.setAutoDefault(False)        self.xzwd.setDefault(False)        self.xzwd.setFlat(True)        self.xzwd.setObjectName("xzwd")        self.label_5 = QtWidgets.QLabel(self.frame_2)        self.label_5.setGeometry(QtCore.QRect(30, 60, 131, 21))        font = QtGui.QFont()        font.setFamily("微软雅黑")        self.label_5.setFont(font)        self.label_5.setObjectName("label_5")        self.textEdit = QtWidgets.QTextEdit(self.frame_2)        self.textEdit.setGeometry(QtCore.QRect(50, 110, 61, 51))        font = QtGui.QFont()        font.setFamily("微软雅黑")        font.setPointSize(12)        font.setBold(True)        font.setWeight(75)        self.textEdit.setFont(font)        self.textEdit.setObjectName("textEdit")        self.label_6 = QtWidgets.QLabel(self.frame_2)        self.label_6.setGeometry(QtCore.QRect(140, 130, 41, 21))        font = QtGui.QFont()        font.setFamily("微软雅黑")        self.label_6.setFont(font)        self.label_6.setObjectName("label_6")        self.textEdit_2 = QtWidgets.QTextEdit(self.frame_2)        self.textEdit_2.setGeometry(QtCore.QRect(200, 110, 61, 51))        font = QtGui.QFont()        font.setFamily("微软雅黑")        font.setPointSize(12)        font.setBold(True)        font.setWeight(75)        self.textEdit_2.setFont(font)        self.textEdit_2.setObjectName("textEdit_2")        self.label_7 = QtWidgets.QLabel(PdfC)        self.label_7.setGeometry(QtCore.QRect(480, 250, 71, 21))        font = QtGui.QFont()        font.setFamily("微软雅黑")        self.label_7.setFont(font)        self.label_7.setObjectName("label_7")        self.label_4 = QtWidgets.QLabel(PdfC)        self.label_4.setGeometry(QtCore.QRect(270, 290, 461, 511))        self.label_4.setFrameShape(QtWidgets.QFrame.Box)        self.label_4.setFrameShadow(QtWidgets.QFrame.Plain)        self.label_4.setLineWidth(1)        self.label_4.setText("")        self.label_4.setObjectName("label_4")         self.retranslateUi(PdfC)        QtCore.QMetaObject.connectSlotsByName(PdfC)         os.remove("return.png")     def retranslateUi(self, PdfC):        _translate = QtCore.QCoreApplication.translate        PdfC.setWindowTitle(_translate("PdfC", "PDF拆分"))        self.Reback.setText(_translate("PdfC", "..."))        self.label.setText(_translate("PdfC", "PDF拆分"))        self.scwd.setText(_translate("PdfC", "+ 上传文档"))        self.label_2.setText(_translate("PdfC", "上传文档至此"))        self.label_3.setText(_translate("PdfC", "操作"))        self.xzwd.setText(_translate("PdfC", "开始拆分"))        self.label_5.setText(_translate("PdfC", "输入页数(请勿输0)"))        self.label_6.setText(_translate("PdfC", "到"))        self.label_7.setText(_translate("PdfC", "PDF预览"))

二、main.py实现主要功能程序如下：

class pdcwindow(QtWidgets.QWidget,Ui_PdfC):    def __init__(self):        super(pdcwindow, self).__init__()        self.setupUi(self)    def re_back(self):        self.close()    def sctp(self):         fileName, fileType = QtWidgets.QFileDialog.getOpenFileName(self, "选取文件", os.getcwd(),"自定义(*.pdf;*);;All Files(*)")         self.f = str(fileName)         self.p, self.s =self.f.split(".")         try:          if self.s == "pdf":            # 打开文件            doc = fitz.open(self.f)            # 读取一页 0代表第1页            page_one = doc.loadPage(0)            # 将第一页转换为Pixmap            page_pixmap = page_one.getPixmap()            # 将Pixmap转换为QImage            image_format = QImage.Format_RGBA8888 if page_pixmap.alpha else QImage.Format_RGB888            page_image = QImage(page_pixmap.samples, page_pixmap.width, page_pixmap.height, page_pixmap.stride,image_format)            #width = page_image.width()            #height = page_image.height()            # QImage 转为QPixmap            pix = QPixmap.fromImage(page_image)            # 设置图片大小自适应标签            self.label_4.setScaledContents(True)            # 给标签设置图像            self.label_4.setPixmap(pix)          else:            msg_box = QMessageBox(QMessageBox.Warning, "错误", "文件不是 pdf 文件，请重新选择！")            msg_box.exec_()         except Exception as e:          pass    def xzwj(self):        pdf_file = PdfFileReader(self.f)        output = PdfFileWriter()        str1 = self.textEdit.toPlainText()        num1 = int(str1)        str2 = self.textEdit_2.toPlainText()        num2 = int(str2)        if num1 == num2:            num1 = num1 - 1        for i in range(num1, num2):            output.addPage(pdf_file.getPage(i))        # 写出pdf        pdf_out = "{}_pdf拆分.{}".format(self.p,self.s)        with open(pdf_out, 'ab') as out_pdf:            output.write(out_pdf)        root = tkinter.Tk()        root.withdraw()        tkinter.messagebox.showinfo("提示", "成功下载到源文件所在文件夹")

说明如下：

(1) def sctp(self): 其中的sctp为按钮的objectName属性名字；def xzwj(self):其中的xzwj为按钮的objectName属性名字；

(2) 可通过点击按钮实现本地文件上传；

fileName, fileType = QtWidgets. QFileDialog.getOpenFileName(self, "选取文件", os.getcwd(), "自定义(*.jpg;*.png;*.jpeg;*);;All Files(*)")

(3) 增加了防错功能，当上传的文档格式不是pdf时，将不执行程序，同时提示错误；

(4) 将pdf第一页转为图片，并用label组件显示；

(5) 在def xzwj(self):程序中可实现按页数拆分pdf；

三、最后在主程序中加入以上子程序。

if __name__ =="__main__":    import sys    app = QtWidgets.QApplication(sys.argv)    win = mywindow()    pc = pdcwindow()    win.show()    win.pdf_cf.clicked.connect(win.pic_main)    win.pdf_cf.clicked.connect(pc.show)    pc.Reback.clicked.connect(pc.re_back)    pc.Reback.clicked.connect(win.show)    pc.scwd.clicked.connect(pc.sctp)    pc.xzwd.clicked.connect(pc.xzwj)    sys.exit(app.exec_())

到此，相信大家对“基于PyQt5如何完成PDF拆分功能”有了更深的了解，不妨来实际操作一番吧！这里是编程网网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！