PyQt How to remove a layout from a layout

问题:

datainputHbox = QHBoxLayout()
layout = QVBoxLayout(self)
layout.addLayout(datainputHbox)


pagedatainputdeletboxbutton1.clicked.connect(lambda:self.boxdelete(datainputHbox))

def boxdelete(self, box):

This is the PyQt proragm How write boxdelete funtion in order to remove datainputHbox form layout. I try a lot of. However I just can remove all the widgets but cannot remove layout.

回答1:

You can remove QLayouts by getting their corresponding QLayoutItem and removing it. You should also be storing references to your Layouts, otherwise there is no other way to access them later on unless you know the widget they belong to.

datainputHbox = QHBoxLayout()
self.vlayout = QVBoxLayout(self)
layout.addLayout(datainputHbox)
pagedatainputdeletboxbutton1.clicked.connect(lambda: self.boxdelete(datainputHbox))

def boxdelete(self, box):
    for i in range(self.vlayout.count()):
        layout_item = self.vlayout.itemAt(i)
        if layout_item.layout() == box:
            self.vlayout.removeItem(layout_item)
            return

回答2:

As a generic answer: taken from here with slight, but important changes: you should not call widget.deleteLater(). At least in my case this caused python to crash

Global Function

def deleteItemsOfLayout(layout):
     if layout is not None:
         while layout.count():
             item = layout.takeAt(0)
             widget = item.widget()
             if widget is not None:
                 widget.setParent(None)
             else:
                 deleteItemsOfLayout(item.layout())

together with the boxdelete function from Brendan Abel's answer

def boxdelete(self, box):
    for i in range(self.vlayout.count()):
        layout_item = self.vlayout.itemAt(i)
        if layout_item.layout() == box:
            deleteItemsOfLayout(layout_item.layout())
            self.vlayout.removeItem(layout_item)
            break