从 PyQt4 信号转换为 PyQt5 信号不起作用

Converting from PyQt4 signal to PyQt5 signal doesn't work

我正在尝试将游戏从 PyQt4 转换为 PyQt5,但在转换为较新的信号类型时遇到了一些困难。所以我已经回到原来的状态,我试图首先使用 PyQt4 转换信号。注释行是旧(工作)版本,其下方是新版本。然而,'new' 版本总是将相同的值传递给事件处理程序:0。我尝试了许多细微不同的版本,似乎没有任何效果。想法?

    self.cellButtonNames = [self.ui.cell0Button,  self.ui.cell1Button,  self.ui.cell2Button,  self.ui.cell3Button,  self.ui.cell4Button,  self.ui.cell5Button,
                                        self.ui.cell6Button, self.ui.cell7Button,  self.ui.cell8Button,  self.ui.cell9Button,  self.ui.cell10Button,  self.ui.cell11Button, 
                                        self.ui.cell12Button,  self.ui.cell13Button,  self.ui.cell14Button,  self.ui.cell15Button,  self.ui.cell16Button,  self.ui.cell17Button, 
                                        ...,
                                        self.ui.cell126Button,  self.ui.cell127Button,  self.ui.cell128Button,  self.ui.cell129Button,  self.ui.cell130Button,  self.ui.cell131Button,
                                        self.ui.cell132Button,  self.ui.cell133Button,  self.ui.cell134Button,  self.ui.cell135Button,  self.ui.cell136Button,  self.ui.cell137Button,
                                        self.ui.cell138Button,  self.ui.cell139Button,  self.ui.cell140Button,  self.ui.cell141Button,  self.ui.cell142Button,  self.ui.cell143Button]

    # This will connect all of the ball buttons to one slot (Event Handler) and pass the cell number to that event handler when signalled.
    # This elimates the need for 144 event handling methods! :-)

    cellNumber = 0
    for buttonName in self.cellButtonNames:
        # self.connect(buttonName, QtCore.SIGNAL("clicked()"), lambda who=cellNumber: self.ballClicked(who))
        buttonName.clicked.connect(lambda who=cellNumber: self.ballClicked(who))
        cellNumber += 1

@QtCore.pyqtSignature("")                                                                           # otherefore only want ne signal for this autoconnect.
def ballClicked ( self, cellNumber):
    print("Ball %i clicked" % cellNumber)

这是一个相当有名的"gotcha"。

有一些信号(如 clickedtriggered)具有始终发送值的默认参数。对于按钮和操作,这是一个 bool 表示它们当前的检查状态(即使它们可能未设置为可检查)。

要解决此问题,您可以像这样连接信号:

    buttonName.clicked.connect(
        lambda checked, who=cellNumber: self.ballClicked(who))

但是,在这种特殊情况下,您可能还想考虑改用 QButtonGroup。那只需要 一个 信号连接,而且,作为附带好处,您还可以获得一个现成的界面来管理按钮。