在 kivy 中用动作交换屏幕

Question

是否可以通过动作而不是按下按钮来切换屏幕？我在移动应用程序的上下文中询问，用户通常期望这种行为。

Answer 1

您可以使用 Carousel 小部件。例如：

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.lang import Builder

Builder.load_string("""
<MyWidget>:
    Carousel:
        BoxLayout:
            orientation: 'vertical'
            Label:
                text: "Screen 1"
            Label:
                text: "Some text"
        BoxLayout:
            orientation: 'vertical'
            Label:
                text: "Screen 2"
            BoxLayout:
                Button:
                    text: "1"
                Button:
                    text: "2"
                Button:
                    text: "3"
                Button:
                    text: "4"
        BoxLayout:
            orientation: 'vertical'
            Label:
                text: "Screen 3"
            Label:
                text: "Some other text"
""")

class MyWidget(BoxLayout):
    pass

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

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

Answer 2

我认为这可能是更好的做事方式：

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.carousel import Carousel
from kivy.lang import Builder

Builder.load_string("""
<MyCarousel>:
    BoxLayout:
        orientation: 'vertical'

        Label:
            text: "Screen 1"
        Label:
            text: "Some text"

    BoxLayout:
        orientation: 'vertical'

        Label:
            text: "Screen 2"
        BoxLayout:
            Button:
                text: "1"
            Button:
                text: "2"
            Button:
                text: "3"
            Button:
                text: "4"

    BoxLayout:
        orientation: 'vertical'

        Label:
            text: "Screen 3"
        Label:
            text: "Some other text"
""")

class MyCarousel(Carousel):
    pass

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

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

显然，Carousel 的行为与其他小部件不同，因为它没有默认大小 100、100。

在 kivy 中用动作交换屏幕

Swapping screens with motion in kivy

python

kivy