Python中PyQt中的问题-WebBrowser项目

问题描述

下面的代码是Webbrowser代码。问题是当我想切换功能“ SwitchTab”中发生的选项卡时。我检查了函数'SwitchTab'中的'Tab_Content'变量是否为空-因为它显示'None'-这是问题所在。我不知道为什么会是空的（我已经将代表Issue的代码的部分加粗了）在此先感谢...

P.S：我正在使用python3.8和PyCharm4.5.4以及PyQt5

import sys
import os
import json

from PyQt5.QtWidgets import (QApplication,QWidget,QVBoxLayout,QHBoxLayout,QPushButton,QLabel,QLineEdit,QTabBar,qframe,QStackedLayout,QTabWidget)

from PyQt5.QtGui import QIcon,QWindow,QImage
from PyQt5.QtCore import *
from PyQt5.QtWebEngineWidgets import *




class AddressBar(QLineEdit):
     def __init__(self):
        super().__init__()

     def mousepressEvent(self,e):
         self.selectAll()


class App(qframe):
    def __init__(self):
        super().__init__()

        self.CreateApp()
        self.setwindowTitle("Web browser")
        self.setBaseSize(500,500)

    def CreateApp(self):

        self.layout = QVBoxLayout()
        self.layout.setSpacing(0)
        self.layout.setContentsMargins(0,0)

        *#Creating Tabs*
        self.TabBar = QTabBar(movable=True,tabsClosable=True)
        self.TabBar.tabCloseRequested.connect(self.TabClose)
        **self.TabBar.tabBarClicked.connect(self.SwitchTab)**

        self.TabBar.setCurrentIndex(0)

        *#Tabs List*
        self.TabCount = 0
        self.Tabs = []

        *#Creating the AddressBar*
        self.ToolBar = QWidget()
        self.ToolBarLayout = QHBoxLayout()
        self.AddressBar = AddressBar()

        self.ToolBar.setLayout(self.ToolBarLayout)
        self.ToolBarLayout.addWidget(self.AddressBar)

        *#NewTab Button*
        self.AddTabButton = QPushButton("+")
        self.AddTabButton.clicked.connect(self.AddTab)

        self.ToolBarLayout.addWidget(self.AddTabButton)

        *#Main View*
        self.Container = QWidget()
        self.Container.layout = QStackedLayout()
        self.Container.setLayout(self.Container.layout)


        self.layout.addWidget(self.TabBar)
        self.layout.addWidget(self.ToolBar)
        self.layout.addWidget(self.Container)

        self.setLayout(self.layout)
        
        self.AddTab()
        self.show()

    def TabClose(self,i):
        self.TabBar.removeTab(i)
        print(self.TabCount)
        print(self.Tabs)

    def AddTab(self):
        i = self.TabCount

        self.Tabs.append(QWidget())
        self.Tabs[i].layout = QVBoxLayout()
        self.Tabs[i].setobjectName("Tab " + str(i))

        *#Generate WebView*
        self.Tabs[i].content = QWebEngineView()
        self.Tabs[i].content.load(QUrl.fromUserInput("http://google.com"))

        *#Add WebView to Tabs layout*
        self.Tabs[i].layout.addWidget(self.Tabs[i].content)

        *#Set top level tab [] to layout*
        self.Tabs[i].setLayout(self.Tabs[i].layout)

        *#Add tab to top level StackedWidget*
        self.Container.layout.addWidget(self.Tabs[i])
        self.Container.layout.setCurrentWidget(self.Tabs[i])

        *#Set the tab at top of screen*
        self.TabBar.addTab("New Tab - " + str(i))
        self.TabBar.setTabData(i,"tab" + str(i))
        self.TabBar.setCurrentIndex(i)
        self.TabCount += 1

    **def SwitchTab(self,i):
        Tab_Data = self.TabBar.tabData(i)
        print("tab: ",Tab_Data)
        Tab_Content = self.findChild(QWidget,Tab_Data)
        print(Tab_Content)
        self.Container.layout.setCurrentWidget(Tab_Content)**


if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = App()

    sys.exit(app.exec_())

解决方法

因为findChild方法将objectName而不是您设置的tabData放入其中。在这种情况下，解决方案很简单。只需使用相同的参数设置objectName和tabData。

self.TabBar.setTabData(i,"Tab " + str(i))
self.Tabs[i].setObjectName("Tab " + str(i))

pyqt5 python python-webbrowser