Question

我正在尝试为Kivy中的按钮添加功能，但它无法正常工作。

这是python文件的代码：

import kivy
kivy.require("1.9.1")
from kivy.uix.boxlayout import BoxLayout
from kivy.app           import App
from kivy.uix.label     import Label
from kivy.uix.button    import Button
class MainMenuApp(App):
    def build(self):
        return BoxLayout()
    def Play(self):
        print("Play Button Pressed")  
    def LeaderBoards(self):
        print("Leader Board Button Pressed")   
    def Credits(self):
        print("Credits Button Pressed")
    def Settings(self):
        print("Settings Button Pressed")
if __name__ == "__main__":
    MainMenuApp().run()

对于kv文件：

<BoxLayout>:
    orientation: "vertical"
    spacing: 20
    padding: 60, 40

    Label:
        font_name: "TitleFont.ttf"
        font_size: "60sp"
        text: "Game Title"
        size_hint: 1, 2
    Button:
        background_down: "Blue.jpg"
        background_normal: "Red.jpg"
        font_name: "TitleFont.ttf"
        font_size: "30sp"
        text: "Play"
    Button:
        background_down: "Blue.jpg"
        background_normal: "Red.jpg"
        font_name: "TitleFont.ttf"
        font_size: "30sp"
        text: "LeaderBoards"
    Button:
        background_down: "Blue.jpg"
        background_normal: "Red.jpg"
        font_name: "TitleFont.ttf"
        font_size: "30sp"
        text: "Credits"
    Button:
        background_down: "Blue.jpg"
        background_normal: "Red.jpg"
        font_name: "TitleFont.ttf"
        font_size: "30sp"
        text: "Settings"

此代码生成如下屏幕：Image

我知道我需要使用on_click或on_release方法，但我不知道如何将它连接到我的Python文件中的函数。我的问题与本网站上的其他问题不同，因为它使用kv语言和Python而不仅仅是Python

Answer 1

创建自定义类，然后按root.attribute

访问“attributtes”类

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


Builder.load_string('''

<MyLayout>:
    Button:
        text: 'Try me!'
        on_release: root.button_pressed()

''')


class MyLayout(BoxLayout):

    def button_pressed(self):
        print("Button pressed")


class MyApp(App):

    def build(self):
        return MyLayout()


MyApp().run()

如何在Kivy中为按钮添加功能

1 个答案: