screensetui.kv

<ScreenSetUI>:
    name: "screenSetUI"

    MDBoxLayout:
        orientation: "vertical"
        spacing:16
        MDBoxLayout:#占位
            size_hint_y:.6
        MDRelativeLayout:
            size_hint_y:.3
            MDLabel:
                pos_hint: {'center_x': .25, 'center_y': .75}
                text:'用自定义背景图'
                halign:"center"
            MDSwitch:
                id:id_sw_bkimg
                pos_hint: {'center_x': .55, 'center_y': .70}
                active:False
            MDLabel:
                pos_hint: {'center_x': .25, 'center_y': .5}
                text:'使用自定义棋子'
                halign:"center"
            MDSwitch:
                id:id_sw_piece
                pos_hint: {'center_x': .55, 'center_y': .45}
                active:False 
        MDRelativeLayout:
            size_hint_y:.1
            orientation: "horizontal"
            MDRectangleFlatButton:
                pos_hint:{"center_x": .25, "center_y": .5}
                text: "保存"
                theme_text_color: "Custom"
                text_color: "orange"
                on_release:app.save_ui_settings()
            MDRectangleFlatButton:
                pos_hint:{"center_x": .75, "center_y": .5}
                text: "返回"
                on_release:app.back_mainScreen()