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Kauã Guilherme da Silva Leal
Asked: 2023-09-11 18:52:10 +0800 CST

如何使用KV语言将按钮与功能绑定

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我正在尝试使用 KivyMD 和 Python 制作一个基本的 UI（我是初学者），但我遇到了一些出价问题。如果你们中有人能帮助我，我将非常感激。这是我的 IDE 返回给我的错误：

文件“C:\Users\kaua.silva\Desktop\app_ig\app.kv”，第 67 行，在 on_release 中： root.get_texts() ^^^^^^^^^^^^^^^ 文件“kivy\weakproxy .pyx”，第 32 行，在 kivy.weakproxy.WeakProxy 中。getattr AttributeError：“FloatLayout”对象没有属性“get_texts”

main.py 文件：

from kivymd.tools.hotreload.app import MDApp
from kivy.lang import Builder
from kivy.core.window import Window

class App(MDApp):
    def get_texts(self):
        user_text_field = self.root.ids.username
        user_text_field = user_text_field.text

        password_text_field = self.root.ids.passoword
        password_text_field = password_text_field.text

        quantity_text_field = self.root.ids.quantity
        quantity_text_field = quantity_text_field.text

        return user_text_field, password_text_field, quantity_text_field

    KV_FILES = ["app.kv"]
    DEBUG = True
    def build_app(self):
        Window.size = (320, 370)
        Window.resizable = 0
        return Builder.load_file("app.kv")

App().run()

应用程序.kv 文件：

FloatLayout: #:kivy !
    Image:
        source: "src/images/instagram_bg.jpg"
        allow_stretch: True
        keep_ratio: False
    MDLabel: 
        text: "Comment Bot"
        color: "#FFFFFF"
        font_size: "38sp"
        font_name: "font.ttf"
        pos_hint: {"center_x": 0.59, "center_y": 0.9}
    MDIcon:
        icon: "instagram"
        color: "#FFFFFF"
        font_size: "45sp"
        pos_hint: {"center_x": 0.85, "center_y": 0.90}
    MDTextField:
        id: username
        line_color_normal: "#ffffff"
        line_color_focus: "#ffffff"
        hint_text: "Nome de usuário ou e-mail"
        size_hint_x: .8
        pos_hint: {"center_x": 0.5, "center_y": 0.75}
        mode: "rectangle"
        hint_text_color_normal: "white"
        hint_text_color_focus: "white"
        text_color_focus: "#ffffff"
        text_color_normal: "#ffffff"
        font_size: "20sp"
    MDTextField:
        id: password
        line_color_normal: "#ffffff"
        line_color_focus: "#ffffff"
        text_color: "#ffffff"
        hint_text: "Senha"
        size_hint_x: .8
        pos_hint: {"center_x": 0.5, "center_y": 0.57}
        mode: "rectangle"
        hint_text_color_normal: "white"
        hint_text_color_focus: "white"
        text_color_focus: "#ffffff"
        text_color_normal: "#ffffff"
        font_size: "20sp"
    MDTextField:
        id: quantity
        color_mode: "primary"
        line_color_normal: "#ffffff"
        line_color_focus: "#ffffff"
        hint_text: "Quantidade de comentários"
        size_hint_x: .8
        pos_hint: {"center_x": 0.5, "center_y": 0.39}
        mode: "rectangle"
        hint_text_color_normal: "white"
        hint_text_color_focus: "white"
        text_color_focus: "#ffffff"
        text_color_normal: "#ffffff"
        font_size: "20sp"
    MDRaisedButton:
        text: "Iniciar"
        theme_text_color: "Custom"
        text_color: "#FFFFFF"
        font_style: "Button"
        md_bg_color: "#C8439C"
        size_hint: .5, .13
        pos_hint: {"center_x": .5, "center_y": .155}
        font_size: "16sp"
        on_release: root.get_texts()

我想将函数 get_texts （它只是一个符号函数，我将替换为另一个函数）与 MDRaishedButton 绑定，但 vscode 无法识别该函数。提前致谢！

python

1 个回答

  1. Best Answer

    尝试以下方法代码如下：

    from kivymd.app import MDApp
from kivy.lang import Builder
from kivy.core.window import Window

class MyApp(MDApp):
    def build(self):
        Window.size = (320, 370)
        Window.resizable = 0
        return Builder.load_file("app.kv")

    def get_texts(self):
        user_text_field = self.root.ids.username
        user_text = user_text_field.text

        password_text_field = self.root.ids.password
        password_text = password_text_field.text

        quantity_text_field = self.root.ids.quantity
        quantity_text = quantity_text_field.text

        return user_text, password_text, quantity_text

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

    我已将 app.kv 更改如下：

    FloatLayout:
    Image:
        source: "src/images/instagram_bg.jpg"
        allow_stretch: True
        keep_ratio: False
    # add your other widgets here . . . (your other widgets)
    MDRaisedButton:
        text: "Iniciar"
        theme_text_color: "Custom"
        text_color: "#FFFFFF"
        font_style: "Button"
        md_bg_color: "#C8439C"
        size_hint: .5, .13
        pos_hint: {"center_x": .5, "center_y": .155}
        font_size: "16sp"
        on_release: app.get_texts()

    请尝试该代码。

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