尝试从TabbedPan中删除小部件时，获取错误'self.\u childrens.pop（小部件，无）

Question

我正在尝试从主面板中删除ScreenManager小部件，并用另一个ScreenManager小部件替换它。但是我收到了上面提到的错误。我已经能够以这种方式删除其他小部件（屏幕），而且从未出现错误，但屏幕管理器似乎有所不同

主.py

class MainPanel(TabbedPanel):
    manager = ObjectProperty()
    usb_manager = ObjectProperty()
    hubtests_sm = ObjectProperty()


    def __init__(self, *args, **kwargs):

        super(MainPanel, self).__init__(*args, **kwargs)



    def switch_sm(self):
        self.manager = self.hubtests_sm
        self.remove_widget(self.usb_manager)
        self.add_widget(self.hubtests_sm)

主电源.kv

<MainPanel>:
    id: mp
    manager: usb_manager
    usb_manager: usb_manager


    size_hint: 1,1
    tab_width: 65
    do_default_tab: False
    tab_pos: 'top_right'


    TabbedPanelItem:
        id: usb_tab
        text: 'Usb'
        BoxLayout:
            orientation: 'vertical'
            UsbScreenManager:
                id: usb_manager

usb屏幕管理器.kv

#:import label kivy.uix.label
#:import sla kivy.adapters.simplelistadapter
#:import hvd hub_validation_dict
#:import hvt hub_validation_test2
#:import cfg config

<UsbScreenManager>:
    id: usb_manager 
    h2h: h2h
    hvs: hvs
    v9_icon: v9_icon
    v9_test: v9_test
    c5_icon: c5_icon
    c5_test: c5_test

    H2HScreen:
        id:h2h
    HubValidationScreen:
        id:hvs
    V9ValidationIconScreen
        id: v9_icon
    V9ValidationTestScreen:
        id: v9_test
    C5ValidationIconScreen:
        id: c5_icon
    C5ValidationTestScreen:
        id: c5_test

<H2HScreen>:
    id: h2h
    name: 'h2h'
    BoxLayout:
        id:bl
        orientation: 'vertical'
        TestIcon:
            id: h2hicon
            source: 'h2h.png'


<HubValidationScreen>:
    id: hvs
    name: 'hvs'


    BoxLayout:
        id:bl
        orientation: 'vertical'

        TestIcon:
            id: hubvicon

            source: 'usb_button.png'
            on_press: app.root.switch_sm()<----Attempt to switch screenmanager


  File "/usr/lib/python2.7/dist-packages/kivy/lang.py", line 1465, in custom_callback
     exec(__kvlang__.co_value, idmap)
   File "usb_screen_manager.kv", line 53, in <module>
     on_press: app.root.switch_sm()
   File "sam1.py", line 211, in switch_sm
     self.remove_widget(self.usb_manager)
   File "/usr/lib/python2.7/dist-packages/kivy/uix/tabbedpanel.py", line 547, in remove_widget
     self._childrens.pop(widget, None)
 TypeError: pop() takes at most 1 argument (2 given)

Answer 1

我修复了这个问题，因为我误解了TabbedPanel类。当我应该从TabbedPanelItem类调用它时，我正在从MainPanel类调用remove\小部件。因此，我为MainPanel类中的tabbedpanel项创建了一个ObjectProperty，并使用它删除screen manager小部件。但是由于它们是如何加载的，我最终不得不做一个清晰的小部件，而不是按照正确的顺序重新添加小部件