为什么 PyQt 执行我的操作三次? [英] Why is PyQt executing my actions three times?

问题描述

我还是 PyQt 的新手，但我真的不知道为什么会这样.

I'm still kind of new to PyQt but I really have no idea why this is happening.

我有一个像这样创建的主窗口:

I have a Mainwindow that I create like this:

class MainWindow(QtGui.QMainWindow):
    #initialize
    def __init__(self):
        #Call parent constructor
        super(MainWindow, self).__init__()

        #Load the interface
        self.ui = uic.loadUi(r"Form Files/rsleditor.ui")

        #Show the ui
        self.ui.show()

当我想用以下方法覆盖关闭事件时:

and when I wanted to override the close event with:

def closeEvent(self, event):
    quit_msg = "Are you sure you want to exit the program?"
    reply = QtGui.QMessageBox.question(self, 'Message', 
              quit_msg, QtGui.QMessageBox.Yes, QtGui.QMessageBox.No)

    if reply == QtGui.QMessageBox.Yes:
        self.saveSettings()
        event.accept()
    else:
        event.ignore()

我读到我必须将 uic.loadUI 调用更改为:

I read I had to change the uic.loadUI call to:

self.ui = uic.loadUi(r"Form Files/rsleditor.ui", self)

但是当我这样做时，我所有的动作都开始被触发三遍.我很确定我在添加之前正确设置了信号和插槽，因为它们正在工作.有什么帮助吗?

But when I do this, all of my actions start being set off three times. I'm pretty sure I'm setting up the signals and slots correctly as they were working before adding this. Any help?

pyuic 文件:

    RSLEditorClass.setIconSize(QtCore.QSize(24, 24))
    self.centralWidget = QtGui.QWidget(RSLEditorClass)
    sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Preferred,    QtGui.QSizePolicy.Preferred)
    sizePolicy.setHorizontalStretch(0)
    sizePolicy.setVerticalStretch(0)
    sizePolicy.setHeightForWidth(self.centralWidget.sizePolicy().hasHeightForWidth())
    self.centralWidget.setSizePolicy(sizePolicy)
    self.centralWidget.setObjectName(_fromUtf8("centralWidget"))
    self.vLayMain = QtGui.QVBoxLayout(self.centralWidget)
    self.vLayMain.setObjectName(_fromUtf8("vLayMain"))
    self.hLayFilePath = QtGui.QHBoxLayout()
    self.hLayFilePath.setObjectName(_fromUtf8("hLayFilePath"))
    self.lbFilePath = QtGui.QLabel(self.centralWidget)
    self.lbFilePath.setObjectName(_fromUtf8("lbFilePath"))
    self.hLayFilePath.addWidget(self.lbFilePath)
    self.txtFilePath = QtGui.QLineEdit(self.centralWidget)
    self.txtFilePath.setObjectName(_fromUtf8("txtFilePath"))
    self.hLayFilePath.addWidget(self.txtFilePath)
    self.vLayMain.addLayout(self.hLayFilePath)
    self.splitTxt = QtGui.QSplitter(self.centralWidget)
    sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Preferred, QtGui.QSizePolicy.Expanding)
    sizePolicy.setHorizontalStretch(0)
    sizePolicy.setVerticalStretch(1)
    sizePolicy.setHeightForWidth(self.splitTxt.sizePolicy().hasHeightForWidth())
    self.splitTxt.setSizePolicy(sizePolicy)
    self.splitTxt.setLineWidth(0)
    self.splitTxt.setMidLineWidth(0)
    self.splitTxt.setOrientation(QtCore.Qt.Vertical)
    self.splitTxt.setHandleWidth(10)
    self.splitTxt.setObjectName(_fromUtf8("splitTxt"))
    self.tabMain = QtGui.QTabWidget(self.splitTxt)
    self.tabMain.setBaseSize(QtCore.QSize(0, 0))
    self.tabMain.setElideMode(QtCore.Qt.ElideNone)
    self.tabMain.setTabsClosable(True)
    self.tabMain.setMovable(False)
    self.tabMain.setObjectName(_fromUtf8("tabMain"))
    self.tabOutput = QtGui.QTabWidget(self.splitTxt)
    self.tabOutput.setObjectName(_fromUtf8("tabOutput"))
    self.tabRSLOut = QtGui.QWidget()
    self.tabRSLOut.setObjectName(_fromUtf8("tabRSLOut"))
    self.vLayRSL = QtGui.QVBoxLayout(self.tabRSLOut)
    self.vLayRSL.setObjectName(_fromUtf8("vLayRSL"))
    self.txtRSLOut = QtGui.QTextEdit(self.tabRSLOut)
    self.txtRSLOut.setTextInteractionFlags(QtCore.Qt.TextEditable)
    self.txtRSLOut.setObjectName(_fromUtf8("txtRSLOut"))
    self.vLayRSL.addWidget(self.txtRSLOut)
    self.tabOutput.addTab(self.tabRSLOut, _fromUtf8(""))
    self.tabRIBOut = QtGui.QWidget()
    self.tabRIBOut.setObjectName(_fromUtf8("tabRIBOut"))
    self.vLayRib = QtGui.QVBoxLayout(self.tabRIBOut)
    self.vLayRib.setObjectName(_fromUtf8("vLayRib"))
    self.txtRIBOut = QtGui.QTextEdit(self.tabRIBOut)
    self.txtRIBOut.setTextInteractionFlags(QtCore.Qt.TextEditable)
    self.txtRIBOut.setObjectName(_fromUtf8("txtRIBOut"))
    self.vLayRib.addWidget(self.txtRIBOut)
    self.tabOutput.addTab(self.tabRIBOut, _fromUtf8(""))
    self.vLayMain.addWidget(self.splitTxt)
    RSLEditorClass.setCentralWidget(self.centralWidget)
    self.menuBar = QtGui.QMenuBar(RSLEditorClass)
    self.menuBar.setGeometry(QtCore.QRect(0, 0, 750, 21))
    self.menuBar.setObjectName(_fromUtf8("menuBar"))
    self.menuFile = QtGui.QMenu(self.menuBar)
    self.menuFile.setObjectName(_fromUtf8("menuFile"))
    self.menuRecent_Files = QtGui.QMenu(self.menuFile)
    self.menuRecent_Files.setObjectName(_fromUtf8("menuRecent_Files"))
    self.menuEdit = QtGui.QMenu(self.menuBar)
    self.menuEdit.setObjectName(_fromUtf8("menuEdit"))
    self.menuSearch_Options = QtGui.QMenu(self.menuEdit)
    self.menuSearch_Options.setObjectName(_fromUtf8("menuSearch_Options"))
    self.menuView = QtGui.QMenu(self.menuBar)
    self.menuView.setObjectName(_fromUtf8("menuView"))
    self.menuSearch = QtGui.QMenu(self.menuBar)
    self.menuSearch.setObjectName(_fromUtf8("menuSearch"))
    self.menuDebug = QtGui.QMenu(self.menuBar)
    self.menuDebug.setObjectName(_fromUtf8("menuDebug"))
    self.menuHelp = QtGui.QMenu(self.menuBar)
    self.menuHelp.setObjectName(_fromUtf8("menuHelp"))
    RSLEditorClass.setMenuBar(self.menuBar)
    self.mainToolBar = QtGui.QToolBar(RSLEditorClass)
    self.mainToolBar.setObjectName(_fromUtf8("mainToolBar"))
    RSLEditorClass.addToolBar(QtCore.Qt.TopToolBarArea, self.mainToolBar)
    self.actionNew = QtGui.QAction(RSLEditorClass)
    icon1 = QtGui.QIcon()
    icon1.addPixmap(QtGui.QPixmap(_fromUtf8(":/icons/new.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
    self.actionNew.setIcon(icon1)
    self.actionNew.setObjectName(_fromUtf8("actionNew"))
    self.actionOpen = QtGui.QAction(RSLEditorClass)
    icon2 = QtGui.QIcon()
    icon2.addPixmap(QtGui.QPixmap(_fromUtf8(":/icons/open.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
    self.actionOpen.setIcon(icon2)
    self.actionOpen.setObjectName(_fromUtf8("actionOpen"))
    self.actionSave = QtGui.QAction(RSLEditorClass)
    icon3 = QtGui.QIcon()
    icon3.addPixmap(QtGui.QPixmap(_fromUtf8(":/icons/save.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
    self.actionSave.setIcon(icon3)
    self.actionSave.setObjectName(_fromUtf8("actionSave"))
    self.actionSave_As = QtGui.QAction(RSLEditorClass)
    icon4 = QtGui.QIcon()
    icon4.addPixmap(QtGui.QPixmap(_fromUtf8(":/icons/save as.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
    self.actionSave_As.setIcon(icon4)
    self.actionSave_As.setObjectName(_fromUtf8("actionSave_As"))
    self.actionUndo = QtGui.QAction(RSLEditorClass)
    icon5 = QtGui.QIcon()
    icon5.addPixmap(QtGui.QPixmap(_fromUtf8(":/icons/undo.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
    self.actionUndo.setIcon(icon5)
    self.actionUndo.setObjectName(_fromUtf8("actionUndo"))
    self.actionRedo = QtGui.QAction(RSLEditorClass)
    icon6 = QtGui.QIcon()
    icon6.addPixmap(QtGui.QPixmap(_fromUtf8(":/icons/redo.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
    self.actionRedo.setIcon(icon6)
    self.actionRedo.setObjectName(_fromUtf8("actionRedo"))
    self.actionCut = QtGui.QAction(RSLEditorClass)
    icon7 = QtGui.QIcon()
    icon7.addPixmap(QtGui.QPixmap(_fromUtf8(":/icons/cut.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
    self.actionCut.setIcon(icon7)
    self.actionCut.setObjectName(_fromUtf8("actionCut"))
    self.actionCopy = QtGui.QAction(RSLEditorClass)
    icon8 = QtGui.QIcon()
    icon8.addPixmap(QtGui.QPixmap(_fromUtf8(":/icons/copy.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
    self.actionCopy.setIcon(icon8)
    self.actionCopy.setObjectName(_fromUtf8("actionCopy"))
    self.actionPaste = QtGui.QAction(RSLEditorClass)
    icon9 = QtGui.QIcon()
    icon9.addPixmap(QtGui.QPixmap(_fromUtf8(":/icons/paste.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
    self.actionPaste.setIcon(icon9)
    self.actionPaste.setObjectName(_fromUtf8("actionPaste"))
    self.actionSelect_All = QtGui.QAction(RSLEditorClass)
    self.actionSelect_All.setObjectName(_fromUtf8("actionSelect_All"))
    self.actionCompile = QtGui.QAction(RSLEditorClass)
    icon10 = QtGui.QIcon()
    icon10.addPixmap(QtGui.QPixmap(_fromUtf8(":/icons/compile.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
    self.actionCompile.setIcon(icon10)
    self.actionCompile.setObjectName(_fromUtf8("actionCompile"))
    self.actionFind_Replace = QtGui.QAction(RSLEditorClass)
    self.actionFind_Replace.setObjectName(_fromUtf8("actionFind_Replace"))
    self.actionPreferences = QtGui.QAction(RSLEditorClass)
    icon11 = QtGui.QIcon()
    icon11.addPixmap(QtGui.QPixmap(_fromUtf8(":/icons/prefs.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
    self.actionPreferences.setIcon(icon11)
    self.actionPreferences.setObjectName(_fromUtf8("actionPreferences"))
    self.actionAdd_Shader_Path = QtGui.QAction(RSLEditorClass)
    self.actionAdd_Shader_Path.setObjectName(_fromUtf8("actionAdd_Shader_Path"))
    self.actionAdd_Textures_Path = QtGui.QAction(RSLEditorClass)
    self.actionAdd_Textures_Path.setObjectName(_fromUtf8("actionAdd_Textures_Path"))
    self.actionAdd_Archives_Path = QtGui.QAction(RSLEditorClass)
    self.actionAdd_Archives_Path.setObjectName(_fromUtf8("actionAdd_Archives_Path"))
    self.actionAdd_PointCloud_Path = QtGui.QAction(RSLEditorClass)
    self.actionAdd_PointCloud_Path.setObjectName(_fromUtf8("actionAdd_PointCloud_Path"))
    self.actionAdd_BrickMap_Path = QtGui.QAction(RSLEditorClass)
    self.actionAdd_BrickMap_Path.setObjectName(_fromUtf8("actionAdd_BrickMap_Path"))
    self.actionAdd_PhotonMap_Path = QtGui.QAction(RSLEditorClass)
    self.actionAdd_PhotonMap_Path.setObjectName(_fromUtf8("actionAdd_PhotonMap_Path"))
    self.actionEditor_Docs = QtGui.QAction(RSLEditorClass)
    self.actionEditor_Docs.setObjectName(_fromUtf8("actionEditor_Docs"))
    self.actionDelight_Docs = QtGui.QAction(RSLEditorClass)
    self.actionDelight_Docs.setObjectName(_fromUtf8("actionDelight_Docs"))
    self.actionPRMan_Docs = QtGui.QAction(RSLEditorClass)
    self.actionPRMan_Docs.setObjectName(_fromUtf8("actionPRMan_Docs"))
    self.actionFundza = QtGui.QAction(RSLEditorClass)
    self.actionFundza.setObjectName(_fromUtf8("actionFundza"))
    self.actionColor_Picker = QtGui.QAction(RSLEditorClass)
    self.actionColor_Picker.setObjectName(_fromUtf8("actionColor_Picker"))
    self.actionClose_Tab = QtGui.QAction(RSLEditorClass)
    self.actionClose_Tab.setObjectName(_fromUtf8("actionClose_Tab"))
    self.actionExit = QtGui.QAction(RSLEditorClass)
    self.actionExit.setObjectName(_fromUtf8("actionExit"))
    self.menuRecent_Files.addSeparator()
    self.menuFile.addAction(self.actionNew)
    self.menuFile.addAction(self.actionOpen)
    self.menuFile.addAction(self.menuRecent_Files.menuAction())
    self.menuFile.addSeparator()
    self.menuFile.addAction(self.actionSave)
    self.menuFile.addAction(self.actionSave_As)
    self.menuFile.addSeparator()
    self.menuFile.addAction(self.actionClose_Tab)
    self.menuFile.addAction(self.actionExit)
    self.menuSearch_Options.addAction(self.actionAdd_Shader_Path)
    self.menuSearch_Options.addAction(self.actionAdd_Textures_Path)
    self.menuSearch_Options.addAction(self.actionAdd_Archives_Path)
    self.menuSearch_Options.addAction(self.actionAdd_PointCloud_Path)
    self.menuSearch_Options.addAction(self.actionAdd_BrickMap_Path)
    self.menuSearch_Options.addAction(self.actionAdd_PhotonMap_Path)
    self.menuEdit.addAction(self.actionUndo)
    self.menuEdit.addAction(self.actionRedo)
    self.menuEdit.addSeparator()
    self.menuEdit.addAction(self.actionCut)
    self.menuEdit.addAction(self.actionCopy)
    self.menuEdit.addAction(self.actionPaste)
    self.menuEdit.addSeparator()
    self.menuEdit.addAction(self.actionSelect_All)
    self.menuEdit.addSeparator()
    self.menuEdit.addAction(self.menuSearch_Options.menuAction())
    self.menuEdit.addAction(self.actionColor_Picker)
    self.menuSearch.addAction(self.actionFind_Replace)
    self.menuDebug.addAction(self.actionCompile)
    self.menuDebug.addSeparator()
    self.menuDebug.addAction(self.actionPreferences)
    self.menuHelp.addAction(self.actionEditor_Docs)
    self.menuHelp.addSeparator()
    self.menuHelp.addAction(self.actionDelight_Docs)
    self.menuHelp.addSeparator()
    self.menuHelp.addAction(self.actionPRMan_Docs)
    self.menuHelp.addSeparator()
    self.menuHelp.addAction(self.actionFundza)
    self.menuBar.addAction(self.menuFile.menuAction())
    self.menuBar.addAction(self.menuEdit.menuAction())
    self.menuBar.addAction(self.menuView.menuAction())
    self.menuBar.addAction(self.menuSearch.menuAction())
    self.menuBar.addAction(self.menuDebug.menuAction())
    self.menuBar.addAction(self.menuHelp.menuAction())
    self.mainToolBar.addAction(self.actionNew)
    self.mainToolBar.addAction(self.actionOpen)
    self.mainToolBar.addAction(self.actionSave)
    self.mainToolBar.addAction(self.actionSave_As)
    self.mainToolBar.addAction(self.actionUndo)
    self.mainToolBar.addAction(self.actionRedo)
    self.mainToolBar.addAction(self.actionCut)
    self.mainToolBar.addAction(self.actionCopy)
    self.mainToolBar.addAction(self.actionPaste)
    self.mainToolBar.addAction(self.actionCompile)
    self.mainToolBar.addAction(self.actionPreferences)

    self.retranslateUi(RSLEditorClass)
    self.tabMain.setCurrentIndex(-1)
    self.tabOutput.setCurrentIndex(0)
    QtCore.QMetaObject.connectSlotsByName(RSLEditorClass)

def retranslateUi(self, RSLEditorClass):
    RSLEditorClass.setWindowTitle(_translate("RSLEditorClass", "RSLEditor", None))
    self.lbFilePath.setText(_translate("RSLEditorClass", "File Path:", None))
    self.tabOutput.setTabText(self.tabOutput.indexOf(self.tabRSLOut), _translate("RSLEditorClass", "RSL Output", None))
    self.tabOutput.setTabText(self.tabOutput.indexOf(self.tabRIBOut), _translate("RSLEditorClass", "RIB Output", None))
    self.menuFile.setTitle(_translate("RSLEditorClass", "File", None))
    self.menuRecent_Files.setTitle(_translate("RSLEditorClass", "Recent Files", None))
    self.menuEdit.setTitle(_translate("RSLEditorClass", "Edit", None))
    self.menuSearch_Options.setTitle(_translate("RSLEditorClass", "Search Options", None))
    self.menuView.setTitle(_translate("RSLEditorClass", "View", None))
    self.menuSearch.setTitle(_translate("RSLEditorClass", "Search", None))
    self.menuDebug.setTitle(_translate("RSLEditorClass", "Debug", None))
    self.menuHelp.setTitle(_translate("RSLEditorClass", "Help", None))
    self.actionNew.setText(_translate("RSLEditorClass", "New", None))
    self.actionNew.setToolTip(_translate("RSLEditorClass", "Create a new file", None))
    self.actionNew.setShortcut(_translate("RSLEditorClass", "Ctrl+N", None))
    self.actionOpen.setText(_translate("RSLEditorClass", "Open", None))
    self.actionOpen.setToolTip(_translate("RSLEditorClass", "Open a file", None))
    self.actionOpen.setShortcut(_translate("RSLEditorClass", "Ctrl+O", None))
    self.actionSave.setText(_translate("RSLEditorClass", "Save", None))
    self.actionSave.setToolTip(_translate("RSLEditorClass", "Save the current file", None))
    self.actionSave.setShortcut(_translate("RSLEditorClass", "Ctrl+S", None))
    self.actionSave_As.setText(_translate("RSLEditorClass", "Save As", None))
    self.actionSave_As.setToolTip(_translate("RSLEditorClass", "Save as a new file", None))
    self.actionSave_As.setShortcut(_translate("RSLEditorClass", "Ctrl+Alt+S", None))
    self.actionUndo.setText(_translate("RSLEditorClass", "Undo", None))
    self.actionUndo.setToolTip(_translate("RSLEditorClass", "Undo last action", None))
    self.actionUndo.setShortcut(_translate("RSLEditorClass", "Ctrl+Z", None))
    self.actionRedo.setText(_translate("RSLEditorClass", "Redo", None))
    self.actionRedo.setToolTip(_translate("RSLEditorClass", "Redo last action", None))
    self.actionRedo.setShortcut(_translate("RSLEditorClass", "Shift+Z", None))
    self.actionCut.setText(_translate("RSLEditorClass", "Cut", None))
    self.actionCut.setToolTip(_translate("RSLEditorClass", "Cut selected text", None))
    self.actionCut.setShortcut(_translate("RSLEditorClass", "Ctrl+X", None))
    self.actionCopy.setText(_translate("RSLEditorClass", "Copy", None))
    self.actionCopy.setToolTip(_translate("RSLEditorClass", "Copy selected text", None))
    self.actionCopy.setShortcut(_translate("RSLEditorClass", "Ctrl+C", None))
    self.actionPaste.setText(_translate("RSLEditorClass", "Paste", None))
    self.actionPaste.setToolTip(_translate("RSLEditorClass", "Paste text", None))
    self.actionPaste.setShortcut(_translate("RSLEditorClass", "Ctrl+V", None))
    self.actionSelect_All.setText(_translate("RSLEditorClass", "Select All", None))
    self.actionSelect_All.setToolTip(_translate("RSLEditorClass", "Select all text", None))
    self.actionSelect_All.setShortcut(_translate("RSLEditorClass", "Ctrl+A", None))
    self.actionCompile.setText(_translate("RSLEditorClass", "Compile", None))
    self.actionCompile.setToolTip(_translate("RSLEditorClass", "Compile current document", None))
    self.actionCompile.setShortcut(_translate("RSLEditorClass", "Alt+E", None))
    self.actionFind_Replace.setText(_translate("RSLEditorClass", "Find/Replace", None))
    self.actionFind_Replace.setToolTip(_translate("RSLEditorClass", "Open find/replace dialog", None))
    self.actionFind_Replace.setShortcut(_translate("RSLEditorClass", "Ctrl+F", None))
    self.actionPreferences.setText(_translate("RSLEditorClass", "Preferences", None))
    self.actionPreferences.setToolTip(_translate("RSLEditorClass", "Open the preferences dialog", None))
    self.actionPreferences.setShortcut(_translate("RSLEditorClass", "Ctrl+P", None))
    self.actionAdd_Shader_Path.setText(_translate("RSLEditorClass", "Add Shader Path", None))
    self.actionAdd_Textures_Path.setText(_translate("RSLEditorClass", "Add Textures Path", None))
    self.actionAdd_Archives_Path.setText(_translate("RSLEditorClass", "Add Archives Path", None))
    self.actionAdd_PointCloud_Path.setText(_translate("RSLEditorClass", "Add PointCloud Path", None))
    self.actionAdd_BrickMap_Path.setText(_translate("RSLEditorClass", "Add BrickMap Path", None))
    self.actionAdd_PhotonMap_Path.setText(_translate("RSLEditorClass", "Add PhotonMap Path", None))
    self.actionEditor_Docs.setText(_translate("RSLEditorClass", "Editor Docs", None))
    self.actionDelight_Docs.setText(_translate("RSLEditorClass", "3Delight Docs", None))
    self.actionPRMan_Docs.setText(_translate("RSLEditorClass", "PRMan Docs", None))
    self.actionFundza.setText(_translate("RSLEditorClass", "Fundza", None))
    self.actionColor_Picker.setText(_translate("RSLEditorClass", "Color Picker", None))
    self.actionColor_Picker.setShortcut(_translate("RSLEditorClass", "Ctrl+I", None))
    self.actionClose_Tab.setText(_translate("RSLEditorClass", "Close Tab", None))
    self.actionExit.setText(_translate("RSLEditorClass", "Exit", None))

import rsleditor_rc

推荐答案

如果你向下滚动到 ui 模块中 setupUi 方法的底部，你会看到这一行:

If you scroll down to the bottom of the setupUi method in the ui module, you'll see this line:

    QtCore.QMetaObject.connectSlotsByName(RSLEditorClass)

这样做是为了自动将信号连接到slot 基于插槽名称的格式.槽名格式为:

What this does, is to automatically connect signals to slots based on the format of the slot names. The format of the slot name is:

    on_[object name]_[signal name]

所以看看你连接你的动作的方式:

So looking at the way you're connecting your actions:

    self.ui.actionNew.triggered.connect(self.on_actionNew_triggered)

很明显，您在命名插槽时使用了这种格式，这就是问题所在.但是为什么这会导致插槽被3 次调用?好吧，在 PyQt 中，triggered 信号有两个重载:一个它发送默认的 checked 参数，一个不发送.如果您没有指定要连接到其中的哪一个，两个 重载都将连接.因此，在您的情况下，发生的情况是 on_actionNew_triggered 通过 connectSlotsByName 连接两次，并通过您自己的显式连接一次连接，共制作三个.据推测，其他动作也可以讲述类似的故事.

it should be clear that you're using this format when naming your slots, and that that is where the problem lies. But why does this cause the slot to be called three times? Well, in PyQt, the triggered signal has two overloads: one which sends the default checked parameter, and one which doesn't. If you don't specify which one of these you want to connect to, both overloads will get connected. So in your case, what happens is that on_actionNew_triggered gets connected twice by connectSlotsByName and once by your own explicit connection, making three in all. And presumably, a similar story can be told for the other actions.

要解决此问题，您可以重命名您的插槽，使它们不使用自动连接格式:

To fix this, you can either rename your slots so they don't use the auto-connection format:

    self.ui.actionNew.triggered.connect(self.handleActionNew)
    ...

    def handleActionNew(self):
    ...

或者去掉显式连接，使用pyqtSlot装饰器为自动连接选择正确的重载:

or get rid of the explicit connection, and use the pyqtSlot decorator to select the right overload for auto-connection:

    @QtCore.pyqtSlot()
    def on_actionNew_triggered(self):
    ...

或:

    @QtCore.pyqtSlot(bool)
    def on_actionNew_triggered(self, checked):
    ...

这篇关于为什么 PyQt 执行我的操作三次?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！