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Question

我想使用 ButtonNavigation + MDList，但列表只能在半个屏幕上看到（见屏幕截图）。可以全屏显示列表吗？

<CreateScreen>
    name: "create_screen"
    BoxLayout:
        orientation: "vertical"
        ScrollView:
            MDList:
                TwoLineAvatarIconListItem:
                    id: list1
                    text: "Date"
                    secondary_text: "Time"
                    IconLeftWidget:
                        icon: "github"
                        on_release: print("Hello")
                    IconRightWidget:
                        icon: "clock"


        MDBottomNavigation:
            MDBottomNavigationItem:
                name: 'screen 1'
                text: 'Back'
                icon: "arrow-left"
                on_tab_release: root.manager.current = "main_screen"


            MDBottomNavigationItem:
                name: 'screen 2'
                text: 'ADD'
                icon: "calendar-plus"
                on_tab_release: root.create_new_date_picker()

Screenshot - List is just on half screen

Answer 1

你可以在每一个底部item下面添加内容就可以解决，也可以使用RecycleView优化内存，使用代码：

<CreateScreen>
    name: "create_screen"
    BoxLayout:
        orientation: 'vertical'
        #do not put the content of your screen or scrollview here,
        #because the bottom toolbar has its own screen body


        MDBottomNavigation:
            MDBottomNavigationItem:
                name: 'screen 1'
                text: 'Back'
                icon: "arrow-left"
                #on_tab_release: root.manager.current = "main_screen"
                ScrollView:
                    MDList:
                        TwoLineAvatarIconListItem:
                            id: list1
                            text: "jbsidis"
                            secondary_text: "Time"
                            IconLeftWidget:
                                icon: "pencil"
                                on_release: print("Hello")
                            IconRightWidget:
                                icon: "clock"
                        TwoLineAvatarIconListItem:
                            canvas:
                                Color:
                                    rgba: [0,1,0,.3]
                                Rectangle:
                                    pos: self.pos
                                    size: self.size
                            id: list1
                            text: "El Salvador"
                            secondary_text: "Time"
                            IconLeftWidget:
                                icon: "pencil"
                                on_release: print("Hello")
                            IconRightWidget:
                                icon: "clock"
                        TwoLineAvatarIconListItem:
                            id: list1
                            markup: True
                            text: "[i]New promotions"
                            secondary_text: "Time"
                            IconLeftWidget:
                                icon: "pencil"
                                on_release: print("Hello")
                            IconRightWidget:
                                icon: "clock"
                        TwoLineAvatarIconListItem:
                            canvas:
                                Color:
                                    rgba: [0,0,1,.3]
                                Rectangle:
                                    pos: self.pos
                                    size: self.size
                            id: list1
                            text: "jbsidis"
                            secondary_text: "Time"
                            IconLeftWidget:
                                icon: "pencil"
                                on_release: print("Hello")
                            IconRightWidget:
                                icon: "clock"
                        TwoLineAvatarIconListItem:
                            id: list1
                            text: "jbsidis"
                            secondary_text: "Time"
                            IconLeftWidget:
                                icon: "pencil"
                                on_release: print("Hello")
                            IconRightWidget:
                                icon: "clock"
                        TwoLineAvatarIconListItem:
                            id: list1
                            text: "jbsidis"
                            secondary_text: "Time"
                            IconLeftWidget:
                                icon: "pencil"
                                on_release: print("Hello")
                            IconRightWidget:
                                icon: "clock"
                        TwoLineAvatarIconListItem:
                            id: list1
                            text: "jbsidis"
                            secondary_text: "Time"
                            IconLeftWidget:
                                icon: "pencil"
                                on_release: print("Hello")
                            IconRightWidget:
                                icon: "clock"
                        TwoLineAvatarIconListItem:
                            id: list1
                            text: "jbsidis"
                            secondary_text: "Time"
                            IconLeftWidget:
                                icon: "pencil"
                                on_release: print("Hello")
                            IconRightWidget:
                                icon: "clock"
                        TwoLineAvatarIconListItem:
                            id: list1
                            text: "jbsidis"
                            secondary_text: "Time"
                            IconLeftWidget:
                                icon: "pencil"
                                on_release: print("Hello")
                            IconRightWidget:
                                icon: "clock"


            MDBottomNavigationItem:
                name: 'screen 2'
                text: 'ADD'
                icon: "calendar-plus"
                #on_tab_release: root.create_new_date_picker()
                ScrollView:
                    MDList:
                        TwoLineAvatarIconListItem:
                            id: list1
                            text: "jbsidis"
                            secondary_text: "Time"
                            IconLeftWidget:
                                icon: "star"
                                on_release: print("Hello")
                            IconRightWidget:
                                icon: "clock"
                        TwoLineAvatarIconListItem:
                            canvas:
                                Color:
                                    rgba: [0,1,0,.3]
                                Rectangle:
                                    pos: self.pos
                                    size: self.size
                            id: list1
                            text: "jbsidis"
                            secondary_text: "Time"
                            IconLeftWidget:
                                icon: "star"
                                on_release: print("Hello")
                            IconRightWidget:
                                icon: "clock"
                        TwoLineAvatarIconListItem:
                            id: list1
                            text: "jbsidis"
                            secondary_text: "Time"
                            IconLeftWidget:
                                icon: "star"
                                on_release: print("Hello")
                            IconRightWidget:
                                icon: "clock"
                        TwoLineAvatarIconListItem:
                            canvas:
                                Color:
                                    rgba: [0,0,1,.3]
                                Rectangle:
                                    pos: self.pos
                                    size: self.size
                            id: list1
                            text: "jbsidis"
                            secondary_text: "Time"
                            IconLeftWidget:
                                icon: "star"
                                on_release: print("Hello")
                            IconRightWidget:
                                icon: "clock"
                        TwoLineAvatarIconListItem:
                            id: list1
                            text: "jbsidis"
                            secondary_text: "Time"
                            IconLeftWidget:
                                icon: "pencil"
                                on_release: print("Hello")
                            IconRightWidget:
                                icon: "clock"
                        TwoLineAvatarIconListItem:
                            id: list1
                            text: "jbsidis"
                            secondary_text: "Time"
                            IconLeftWidget:
                                icon: "pencil"
                                on_release: print("Hello")
                            IconRightWidget:
                                icon: "clock"
                        TwoLineAvatarIconListItem:
                            id: list1
                            text: "jbsidis"
                            secondary_text: "Time"
                            IconLeftWidget:
                                icon: "pencil"
                                on_release: print("Hello")
                            IconRightWidget:
                                icon: "clock"
                        TwoLineAvatarIconListItem:
                            id: list1
                            text: "jbsidis"
                            secondary_text: "Time"
                            IconLeftWidget:
                                icon: "pencil"
                                on_release: print("Hello")
                            IconRightWidget:
                                icon: "clock"
                        TwoLineAvatarIconListItem:
                            id: list1
                            text: "jbsidis"
                            secondary_text: "Time"
                            IconLeftWidget:
                                icon: "pencil"
                                on_release: print("Hello")
                            IconRightWidget:
                                icon: "clock"

图片如下：

Answer 2

我向 MDBottomNaviagtion 添加了以下内容

MDBottomNavigation:
            height: self.minimum_height
            size_hint: 1, 0.1

现在它只使用它需要的space。

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