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。
c/c++开发分享基于PyQt5完成的PDF拆分功能就是基于pyqt5完成的pdf拆分功能，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 os from pyqt5 import qtcore, qtgui, qtwidgets import base64 from 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属性免费精选名字大全；def xzwj(self):其中的xzwj为按钮的objectname属性免费精选名字大全；
(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_())
四、总结
c/c++开发分享基于PyQt5完成的PDF拆分功能介绍的pdf拆分功能还有一些待完善地方，例如可增加预览功能，实现每页预览，以及如何实现多条件拆分。当然我们可以在后续阶段逐渐完善。
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