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python - kivymd text field stills shows the hint_text in the field after typing

问题描述

I am having trouble with MDTextField. It carries on displaying the hint inside the textfield while typing. I have tried setting the background color to hide it but that didn't work. I have looked at a few tutorials and everyone seems to be doing it the same way as me and it just works for other people so i feel i have done something really wrong.

Image of what happens this is my first post so i am not aloud to post images :)

Any help will be greatly appreciated. Thanks in advance.

main.py

from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.floatlayout import FloatLayout
from kivy.core.window import Windowfrom kivy.config import Config
from kivy.uix.screenmanager import ScreenManager, Screen
from kivymd.theming import ThemeManager
from kivy.lang import Builder
from kivymd.app import MDApp
from kivy.graphics import Rectangle, Color
import pymysql


class WelcomeScreen(Screen):
    pass


class LoginScreen(Screen):
    pass


class RegisterScreen(Screen):
    pass


class WindowManager(ScreenManager):
    pass


class MainApp(MDApp):

    def build(self):
        # theme_cls = ThemeManager()
        return Builder.load_file("main.kv")

    def change_screen(self, screen, direction):
        self.root.transition.direction = direction
        self.root.current = screen


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

main.kv

#: import Window kivy.core.window.Window
#: import MDLabel kivymd.uix.label.MDLabel
#: import Rectangle kivy.graphics.Rectangle
#: import Color kivy.graphics.Rectangle


WindowManager:
    WelcomeScreen:
    LoginScreen:
    RegisterScreen:



<WelcomeScreen>:
    name: "welcome_screen"




    FloatLayout:
        orientation: "vertical"

        MDToolbar:
            id: toolbar
            title: "SecureIT 24/7"
            pos_hint: {'top': 1}



        Button:

            text: 'Login'
            color: 1, 1, 1, 1
            size_hint: 0.25, 0.25
            pos_hint: {"right":0.625, "top":0.80}
            on_release:
                app.root.current = "login_screen"

        Button:

            text: 'Register'
            color: 1,1,1,1
            size_hint: 0.25, 0.25
            pos_hint: {"right":0.625, "top":0.55 }
            on_release:
                app.root.current = "register_screen"


<LoginScreen>:
    name: "login_screen"
    FloatLayout:
        MDBanner:
            id: banner
            text: "Login"
            # The widget that is under the banner.
            # It will be shifted down to the height of the banner.

        MDToolbar:
            id: toolbar
            title: "Login"
            elevation: 10
            pos_hint: {'top': 1}
            left_action_items: [['arrow-left', lambda screen: app.change_screen('welcome_screen', 'right')]]

    FloatLayout:
        padding: [50,50,50,50]
        spacing: 50

        FloatLayout:

            orientation: 'vertical'

            Label:
                text: 'Login'
                font_size: 18
                halign: 'center'
                text_size: root.width-20, 20
                color: 0,0,0,1
                pos_hint: {"right":1, "top":1.25}

            TextInput:
                id: login
                multiline:False
                font_size: 28
                size_hint: 0.50, 0.10
                pos_hint: {"right":0.75, "top":0.70}

        FloatLayout:

            orientation: 'vertical'

            Label:
                text: 'Password'
                halign: 'center'
                font_size: 18
                text_size: root.width-20, 20
                color: 0,0,0,1

            TextInput:
                id: password
                multiline:False
                password:True
                font_size: 28
                size_hint: 0.50, 0.10
                pos_hint: {"right":0.75, "top":0.45}

            Button:
                text: 'Login'
                size_hint: 0.25, 0.25
                font_size: 24
                pos_hint: {"right":0.625, "top":0.30}

<WhiteLabel@MDLabel>
    height: self.texture_size[1]
    theme_text_color: "Custom"
    text_color: 1, 1, 1, 1

<CustomInput@MDTextField>
    multiline:False
#    required: True
    mode: "line"
    pos_hint: {"right": 0.456}
    current_hint_text_color: [0,0,0,0.5]



<RegisterScreen>:
    name: "register_screen"
    FloatLayout:
        MDBanner:
            id: banner
            text: "ioshrdioaoisdhf"

        MDToolbar:
            id: toolbar
            title: "Register"
            elevation: 10
            pos_hint: {'top': 1}
            left_action_items: [['arrow-left', lambda screen: app.change_screen('welcome_screen', 'right')]]

            BoxLayout:
                orientation: "vertical"
                height: self.minimum_height * 2
                size_hint_y: None
                pos_hint: {"top": 2}

                CustomInput:
                    id: firstname
                    hint_text: "color_mode = 'custom'"


                CustomInput:
                    id: surname
                    hint_text: 'Surname'

                CustomInput:
                    id: email
                    hint_text: 'Email'

标签： pythonkivykivymd

解决方案

通过将kv文件命名为main.kv，您将利用文档中描述的正确命名文件的自动kv加载。但是，您还使用. 多次加载同一个文件可能会导致您看到的那种问题。您可以通过简单地消除对 的调用或删除整个方法，或者通过更改文件或类的名称来解决您的问题。Builder.load_file("main.kv")kvBuilder.load_file("main.kv")build()kvMainApp

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