使用PySide2通过URL地址打开PDF文件

一.使用Qt设计师制作界面导出程序

1.先新建一个窗口：

2.插入控件widget并将其提升为QWebEngineView：

3.导出python为代码然后导入QWebEngineSettings：

from PySide2.QtWebEngineWidgets import QWebEngineView,QWebEngineSettings

4.找到self.widget = QWebEngineView(self.centralwidget)更改为：

self.widget = WebEngineView(self.centralwidget)   #名称可以随意更改上下一致即可

5.在程序末尾添加：

class  WebEngineView(QWebEngineView):
    def __init__(self, mainwindow):
        super(WebEngineView, self).__init__()
        #关键代码
        self.settings().setAttribute(QWebEngineSettings.PluginsEnabled, True) 
        self.settings().setAttribute(QWebEngineSettings.PdfViewerEnabled, True)

        # 支持视频播放
        #self.settings().setAttribute(QWebEngineSettings.PluginsEnabled, True)  

6.全部代码：

from PySide2.QtCore import *
from PySide2.QtGui import *
from PySide2.QtWidgets import *

from PySide2.QtWebEngineWidgets import QWebEngineView,QWebEngineSettings


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        if not MainWindow.objectName():
            MainWindow.setObjectName(u"MainWindow")
        MainWindow.resize(640, 480)
        self.centralwidget = QWidget(MainWindow)
        self.centralwidget.setObjectName(u"centralwidget")
        self.gridLayout = QGridLayout(self.centralwidget)
        self.gridLayout.setObjectName(u"gridLayout")
        self.widget = WebEngineView(self.centralwidget)   #名称可以随意更改上下一致即可
        self.widget.setObjectName(u"widget")

        self.gridLayout.addWidget(self.widget, 0, 0, 1, 1)

        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QMenuBar(MainWindow)
        self.menubar.setObjectName(u"menubar")
        self.menubar.setGeometry(QRect(0, 0, 640, 26))
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QStatusBar(MainWindow)
        self.statusbar.setObjectName(u"statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)

        QMetaObject.connectSlotsByName(MainWindow)
    # setupUi

    def retranslateUi(self, MainWindow):
        MainWindow.setWindowTitle(QCoreApplication.translate("MainWindow", u"MainWindow", None))
    # retranslateUi

class  WebEngineView(QWebEngineView):
    def __init__(self, mainwindow):
        super(WebEngineView, self).__init__()

         #关键代码
        self.settings().setAttribute(QWebEngineSettings.PluginsEnabled, True)  
        
        self.settings().setAttribute(QWebEngineSettings.PdfViewerEnabled, True)

         # 支持视频播放
        #self.settings().setAttribute(QWebEngineSettings.PluginsEnabled, True)  

二.编写程序调用UI

1.先导入如下库文件：

import sys
from ui_web import Ui_MainWindow
from PySide2.QtWidgets import QApplication,QMainWindow
from PySide2 import QtCore

2.创建窗口类：

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        # 使用ui文件导入定义界面类
        self.ui = Ui_MainWindow()
        # 初始化界面
        self.ui.setupUi(self)
        # 使用界面定义的控件，也是从ui里面访问
        self.ui.widget.load(QtCore.QUrl.fromUserInput(URL))

3.调用打开窗口：

if __name__ == "__main__":
    app = QApplication([])
    mainw = MainWindow()
    mainw.show()
    sys.exit(app.exec_())

4.完整代码：

from PySide2 import QtCore
URL = 'https://lingmeng.cc/wp-content/uploads/2022/04/ys3248293843-123.pdf'
class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        # 使用ui文件导入定义界面类
        self.ui = Ui_MainWindow()
        # 初始化界面
        self.ui.setupUi(self)
        # 使用界面定义的控件，也是从ui里面访问
        self.ui.widget.load(QtCore.QUrl.fromUserInput(URL))

if __name__ == "__main__":
    app = QApplication([])
    mainw = MainWindow()
    mainw.show()
    sys.exit(app.exec_())

5运行效果：