在Kivy (.kv)文件中更改.kv中的转换

Question

我一直在用YouTube频道学习Kivy。我制作了两个屏幕和一个屏幕管理器，但它们都是python代码中的类。我看到了像WinManager = ScreenManager(transition=CardTransition())这样的例子，但我没有那样构造代码。如何用代码更改转换？我试图在类的init函数上完成它，但没有工作；并试图在kv文件中添加转换属性。也没起作用。

Python：

from kivy.lang import Builder
from kivy.app import App
from kivy.uix.screenmanager import ScreenManager, Screen, CardTransition


class MainWindow(Screen):
    pass


class AdminPanel(Screen):
    pass


class WinManager(ScreenManager):
    pass


kvTemplate = Builder.load_file("template.kv")


class MyMainApp(App):
    def build(self):
        return kvTemplate


if __name__ == "__main__":
    MyMainApp().run()

Kivy (.kv)：

WinManager:
    MainWindow:
    AdminPanel:

<MainWindow>:
    name: "loginPanel"
    nickname: nicknameID
    password: passwordID
    key: keyID
    GridLayout:
        rows: 2
        GridLayout:
            cols: 2
            Label:
                text: "Nickname: "
            TextInput:
                id: nicknameID
                multiline: False
            Label:
                text: "Password: "
            TextInput:
                id: passwordID
                multiline: False
            Label:
                text: "Key: "
            TextInput:
                id: keyID
                multiline: False
        Button:
            text: "Log in"
            on_release:
                app.root.current = "adminPanel"
                root.manager.transition.direction = "up"

<adminPanel>:
    name: "adminPanel"
    Button:
        text: "Back"
        on_release:
            app.root.current = "loginPanel"
            root.manager.transition.direction = "down"

Answer 1

在您的kv文件中，您可以：

#:import CardTransition kivy.uix.screenmanager.CardTransition

WinManager:
    transition: CardTransition()
    MainWindow:
    AdminPanel: