我已經實施了以下。底部有兩個按鈕。單擊第一個按鈕時，它會從主屏幕轉到第一個屏幕。在第一個屏幕上，單擊右上角按鈕將創建 10 張卡片。但是當嘗試添加on_touch_down時它會崩潰。我添加了toast print一些功能，但沒有任何效果。那么這個問題的解決方案是什么？謝謝main.py 我已經評論過on_touch_down = toast('clicked')。沒有它它也可以工作，但是當取消注釋時，應用程序就會崩潰。如何實施？這樣該卡就可以點擊了。build_string.pyhelper_string = """<MenuButton@MDIconButton>: icon: "menu" theme_text_color: "Custom" text_color: 1,0,0,1 halign: 'bottom' on_press: app.show_main_grid_bottom_sheet()<TButton@MDIconButton>: icon: "menu" theme_text_color: "Custom" text_color: 1,0,0,1 halign: 'center' <TitleText@MDLabel> pos_hint: {"center_y": .95} halign: "center" theme_text_color: "Custom" text_color: 0, 0, 1, 1 font_style: "Subtitle1"ScreenManager: id: screen_manager MainScreen: FirstScreen: id: first_screen_id SecondScreen:<MainScreen>: name: 'main_screen' BoxLayout: orientation: "vertical" spacing: "5dp" MDToolbar: id: toolbar pos_hint: {'bottom': 1} #right_action_items: [["dots-vertical", lambda x: app.show_main_grid_bottom_sheet()]] left_action_items: [["menu", lambda x: app.show_main_grid_bottom_sheet()]] <FirstScreen>: name: 'first_screen' BoxLayout: id: first_screen_box orientation: "vertical" spacing: "5dp" MDToolbar: id: toolbar title: "First Screen" elevation: 5 pos_hint: {'top': 1} right_action_items: [["refresh", lambda x: app.make_card()]] ScrollView: MDBoxLayout: id: first_screen_box_layout orientation: 'vertical' adaptive_height: True padding: dp(15) spacing: dp(5)
1 回答
慕尼黑的夜晚無繁華
TA貢獻1864條經驗 獲得超6個贊
是on_touch_down您可以綁定的事件，它不是MDCard您可以設置的屬性。所以你可以像這樣進行綁定：
def make_card(self):
for i in range(10):
card = MDCard(
orientation="vertical",
padding="8dp",
ripple_behavior=True,
size_hint=[1, None],
#on_touch_down = toast('clicked')
)
card.bind(on_touch_down=self.clicked) # set binding
label_link = MDLabel(text="Card" + str(i))
label_link.font_style = "Caption"
label_header = MDLabel(text="Title" + str(i))
label_header.size_hint = [1, 1]
card.add_widget(label_link)
card.add_widget(label_header)
self.sm.ids.first_screen_id.ids.first_screen_box_layout.add_widget(card)
# method called by binding
def clicked(self, card, touch):
if card.collide_point(*touch.pos):
print('clicked on', card.children[0].text)
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