PyQt5：主窗口顯示沒有任何小部件

Question

我正在使用PyQt5創建我的應用程序。 問題是我的窗口出現了，但是沒有任何小部件（即沒有我的Main class，沒有任何菜單，工具欄等）-仍然為空。 我正在使用Windows 10環境的Python-3.6和PyQt5。

這是我的代碼：

app.py：

#!/usr/bin/env python
import sys

from PyQt5.QtCore import Qt
from PyQt5.QtGui import QIcon
from PyQt5.QtWidgets import QApplication, qApp, QWidget, QMainWindow, QGridLayout, QMenuBar, QAction, QToolBar, QStatusBar

from views import Main

class TerraSoft(QMainWindow):
    def __init__(self):
        QMainWindow.__init__(self)
        self.setWindowTitle('TerraSoft')
        self.setWindowState(Qt.WindowMaximized)

        # init menu
        menubar = QMenuBar()
        fileMenu = menubar.addMenu('File')

        #init toolbar
        exitAct = QAction(QIcon('exit24.png'), 'Exit', self)
        exitAct.setShortcut('Ctrl+Q')
        exitAct.triggered.connect(qApp.quit)

        toolbar = QToolBar()

        # load ihm
        main = Main()
        centWidget = QWidget()

        # widget centralizer
        window = QGridLayout()
        window.addWidget(main, 0, 0)
        centWidget.setLayout(window)

        self.setCentralWidget(centWidget)

        #status bar
        statusBar = QStatusBar().showMessage('Bienvenue dans TerraSoft')

        # show ihm
        self.show()
        main.show()

if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = TerraSoft()
    ex.show()
    sys.exit(app.exec_())

.views（主）

import sys

from PyQt5.QtCore import Qt
from PyQt5.QtGui import QIcon
from PyQt5.QtWidgets import QApplication, QWidget, qApp, QAction, QSplitter, QMenuBar, QToolBar, QGridLayout, QStatusBar

from Family.views import FamilyTreeView
from Specie.views import EventsTableView

class Main(QWidget):
    """description of class"""
    def __init__(self, *args):
        QWidget.__init__(self, *args)

        # init elements of widget
        familyTreeView = FamilyTreeView(self)
        eventsTableView = EventsTableView(self)

        #init splitters
        HSplitter = QSplitter(Qt.Horizontal)
        VSplitter = QSplitter(Qt.Vertical)

        # add elements to splitters
        HSplitter.addWidget(familyTreeView)
        HSplitter.addWidget(eventsTableView)


        grid = QGridLayout()
        grid.addWidget(HSplitter)

我的模塊family.views （我想在將來添加.models，但又要增加一點）：

import sys

from PyQt5.QtCore import Qt
from PyQt5.QtGui import QStandardItemModel, QStandardItem
from PyQt5.QtWidgets import QApplication, QWidget, QTreeView

families = [
    ("Craspedocephalus", [
        ("puniceus", []),
        ("trigonocephalus", [])
    ]),
    ("Trimeresurus", [
        ("albolabris", [])
    ]),
    ("Elapidé", [])
]

class FamilyTreeView(QWidget):
    """description of class"""
    def __init__(self, *args):
        QWidget.__init__(self, *args)

        self.familyList = QTreeView()
        self.familyList.setMaximumWidth(300)

        self.model = QStandardItemModel()
        self.addItems(self.model, families)
        self.familyList.setModel(self.model)

        self.model.setHorizontalHeaderLabels([self.tr("Familles")])

    def addItems(self, parent, elements):     
        for text, children in elements:
            item = QStandardItem(text)
            parent.appendRow(item)
            if children:
                self.addItems(item, children)

和我的模塊specie.views ：

import sys

from PyQt5.QtCore import Qt
from PyQt5.QtGui import QStandardItemModel, QStandardItem
from PyQt5.QtWidgets import QApplication, QWidget, QTableWidget, QTreeView

class EventsTableView(QTableWidget):
    """description of class"""
    def __init__(self, *args):
        QTableWidget.__init__(self, *args)

        self.eventsTable = QTableWidget()
        self.eventsTable.setColumnCount(3)
        self.eventsTable.setHorizontalHeaderLabels(('Date', 'Catégorie', 'Description'))

您可以在下面看到結果：

Answer 1

要修復您的示例，請使用以下Main類：

class Main(QWidget):
    def __init__(self, *args):
        QWidget.__init__(self, *args)

        familyTreeView = FamilyTreeView(self)
        eventsTableView = EventsTableView(self)

        HSplitter = QSplitter(Qt.Horizontal)

        HSplitter.addWidget(familyTreeView)
        HSplitter.addWidget(eventsTableView)
        HSplitter.setStretchFactor(1, 1)

        grid = QGridLayout()
        grid.addWidget(HSplitter)
        self.setLayout(grid)

這個TerraSoft類：

class TerraSoft(QMainWindow):
    def __init__(self):
        QMainWindow.__init__(self)
        self.setWindowTitle('TerraSoft')
        self.setWindowState(Qt.WindowMaximized)

        exitAct = QAction(QIcon('exit24.png'), 'Exit', self)
        exitAct.setShortcut('Ctrl+Q')
        exitAct.triggered.connect(qApp.quit)

        fileMenu = self.menuBar().addMenu('File')
        fileMenu.addAction(exitAct)

        toolbar = self.addToolBar('Main')
        toolbar.addAction(exitAct)

        main = Main()
        self.setCentralWidget(main)

        self.statusBar().showMessage('Bienvenue dans TerraSoft')

這個FamilyTreeView類別：

class FamilyTreeView(QTreeView):
    def __init__(self, *args):
        QTreeView.__init__(self, *args)
        self.setMaximumWidth(300)
        self.setModel(QStandardItemModel(self))
        self.model().setHorizontalHeaderLabels([self.tr("Familles")])
        self.addItems(self.model(), families)

    def addItems(self, parent, elements):
        for text, children in elements:
            item = QStandardItem(text)
            parent.appendRow(item)
            if children:
                self.addItems(item, children)

和這個EventsTableView類：

class EventsTableView(QTableWidget):
    def __init__(self, *args):
        QTableWidget.__init__(self, *args)
        self.setColumnCount(3)
        self.setHorizontalHeaderLabels(('Date', 'Catégorie', 'Description'))