Kivy 两个按钮......如何让其中一个按钮在按下时移除另一个按钮？

Question

我有这段代码，屏幕上有两个按钮，“普通按钮”和“删除按钮”。我需要在按下“删除按钮”时删除普通按钮...请帮助，需要它用于 imp 项目。

主要代码：

from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.gridlayout import GridLayout
from kivy.lang import Builder
from kivy.uix.widget import Widget
from kivy.uix.screenmanager import Screen,ScreenManager

class Main(Screen):
    def remove(self):
        self.remove_widget(self.btn) # I'm not sure what to put here

class Manager(ScreenManager):
    pass

kv=Builder.load_file("btn.kv")
screen=Manager()
screen.add_widget(Main(name="main"))

class Test(App):
    def build(self):
        return screen

Test().run()

KV代码：

<Main>:
    name: "main"
    GridLayout:
        id: GL
        cols: 1
        size_hint: (.5,.5)
        pos_hint: {"center_x":.5,"center_y":.5}
        Button:
            id: btn
            text: "Remove Button"
            size_hint: (.5,.5)
            pos_hint: {"center_x":.5,"center_y":.6}
        Button:
            id: btn2
            text: "Normal Button"
            size_hint: (.5,.5)
            pos_hint: {"center_x":.5,"center_y":.4}
            on_press:
                root.remove()

Answer 1

首先，如果您希望 Remove Button 执行删除操作，则必须将 Remove Button 绑定到 remove() 方法：

    Button:
        id: btn
        text: "Remove Button"
        size_hint: (.5,.5)
        pos_hint: {"center_x":.5,"center_y":.6}
        on_press:
            root.remove(btn2)
    Button:
        id: btn2
        text: "Normal Button"
        size_hint: (.5,.5)
        pos_hint: {"center_x":.5,"center_y":.4}

您可以通过使用 btn2 id 作为 remove() 方法的参数将要删除的 Button 传递给 remove() 方法。

然后您可以在 remove() 方法中使用该参数：

class Main(Screen):
    def remove(self, butt):
        gl = self.ids.GL
        if butt in gl.children:
            gl.remove_widget(butt)
        else:
            print('already removed')

Kivy 两个按钮......如何让其中一个按钮在按下时移除另一个按钮？

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