python - 在框布局中动态添加和删除按钮小部件

Question

需要帮助来找出允许我在文本输入中搜索某些内容并使所有与搜索匹配的项目出现在 boxlayout 中的代码。我才刚刚开始 kivy(3 天前)。

主要.py

# import kivy & functions/widgets.
import kivy
from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.widget import Widget
from kivy.uix.button import Button
from kivy.uix.textinput import TextInput

# import kivy layouts.
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.stacklayout import StackLayout
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.gridlayout import GridLayout

# Specify version or kivy needed.
kivy.require("1.10.1")


class Page(FloatLayout):
    pass



class YuGiOhApp(App):
    def build(self):
        return Page()

YuGiOhApp().run()

我不知道我需要多少进口商品，只是在我玩 kivy 时把它们留在那里了。

游戏王.kv

#:kivy 1.10.1

<TestButton@Button>:
    width: 177
    height: 254
    size_hint: None, None
    background_normal: "pics/32864.jpg"

<FloatLayout>:

    id: searchpage
    display: entry

    Button:
        id: searchbutton
        size_hint: 0.20, 0.10
        pos_hint: {"x": 0.60, "top": 1}
        text: "search"

    Button:
        id: collectionbutton
        size_hint: 0.20, 0.10
        pos_hint: {"x": 0.80, "top": 1}
        text: "collection"

    TextInput:
        id: entry
        multiline: False
        font_size: 48
        size_hint: 0.60, 0.10
        pos_hint: {"x": 0, "top": 1}

    ScrollView:
        size_hint: 0.60, 0.90
        StackLayout:
            orientation: "lr-tb"
            pos_hint: {"x": 0, "top": 0.88}
            size_hint: 1, None

            height: self.minimum_height

            padding: 5
            spacing: 5

            TestButton:
            TestButton:
            TestButton:
            TestButton:
            TestButton:
            TestButton:
            TestButton:
            TestButton:
            TestButton:
            TestButton:
            TestButton:
            TestButton:

到目前为止我的 kivy 代码。

Answer 1

您在评论中写道即使是如何添加和删除小部件的示例也会有很大帮助，因为我可以将其适合我自己的程序和需要!，所以这里是:

from kivy.app import App
from kivy.clock import Clock
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.label import Label


class MyWidget(BoxLayout):
    def __init__(self, *args):
        Clock.schedule_once(self.add_widgets, 1)
        Clock.schedule_once(self.remove_widgets, 2)

        return super().__init__(*args)

    def add_widgets(self, *args):
        # add two widgets
        self.add_widget(Label(text="Hello"))
        self.add_widget(Label(text="World"))

    def remove_widgets(self, *args):
        # remove a widget using children property
        self.remove_widget(self.children[1])


class MyApp(App):
    def build(self):
        return MyWidget()


if __name__ == '__main__':
    MyApp().run()

这很简单。您使用 add_widget 方法添加任何小部件的新创建实例 - 按钮、标签、布局等。然后您可以通过将其 id 传递给 remove_widget 方法来删​​除它。您可以从 children 属性中获取它，也可以自己存储它，例如:

my_button = Button(text="Blah blah")
# ...
my_layout.add_widget(my_button)
# ...
my_layout.remove_widget(my_button)