Python Kivy未知类<；导航抽屉按钮>；
尝试使用示例，但得到'kivy.factory.FactoryException:未知类 问题出在Python Kivy未知类<；导航抽屉按钮>；,python,kivy,Python,Kivy,尝试使用示例，但得到'kivy.factory.FactoryException:未知类 问题出在 MainNavigationLayout: MDNavigationDrawer: id: navigation_drawer drawer_logo: "menu.png" NavigationDrawerIconButton: icon: "home"
MainNavigationLayout:
MDNavigationDrawer:
id: navigation_drawer
drawer_logo: "menu.png"
NavigationDrawerIconButton:
icon: "home"
text: "Inicio"
on_release: screen_manager.current = "screen_inicio"
NavigationDrawerIconButton:
icon: "lock"
text: "Pagina segunda"
on_release: screen_manager.current = "screen_segundo"
出现此错误是因为导航抽屉的用法已更改。请参阅 如果您正在寻找登录示例 这是我之前设计的登录表单（用户名：admin，密码：admin）： login.py
from kivymd.app import MDApp
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.screenmanager import ScreenManager as scr_mngr
from kivymd.toast import toast
from kivy.core.window import Window
from kivymd.uix.tab import MDTabsBase
from kivy.uix.floatlayout import FloatLayout
class Tab(FloatLayout, MDTabsBase):
pass
class MyLayout(BoxLayout):
def check_data_login(self):
self.ids['spinner'].active=True
username = self.ids['username'].text
password = self.ids['password'].text
print(username)
print(password)
if not username and not password:
toast("Username and password are required")
elif not username:
toast("Username is required ")
elif not password:
toast("Password is required")
else:
if username == "admin" and password == "admin":
self.ids['spinner'].active=False
self.change_screen("screen2")
else:
self.ids['spinner'].active=False
toast("Wrong username or password")
def change_screen(self, screen, *args):
self.scr_mngr.current = screen
class DemoApp(MDApp):
pass
if __name__ == '__main__':
Window.show_cursor = True
Window.size = (360, 680)
DemoApp().run()
MyLayout:
scr_mngr: scr_mngr
orientation: 'vertical'
ScreenManager:
id: scr_mngr
Screen:
id: screen1
name: 'screen1'
MDSpinner:
id:spinner
size_hint: None, None
size: dp(46), dp(46)
pos_hint: {'center_x': .5, 'center_y': .5}
active: False
MDToolbar:
md_bg_color: 0, 0, 1, 1
title: "Login Screen"
pos_hint:{"top": 1}
elevation: 11
BoxLayout:
orientation: "vertical"
padding: "16dp"
spacing: "16dp"
size_hint_y: None
height: self.minimum_height
pos_hint: {"center_y": .6}
MDLabel:
text: "Log In"
halign: "center"
font_style: "H4"
size_hint_y: None
MDTextField:
id: username
hint_text: "Username "
helper_text_mode: "on_focus"
required: True
MDTextField:
id: password
hint_text: "Password "
helper_text_mode: "on_focus"
required: True
password: True
MDRaisedButton:
text: "LOGIN"
pos_hint: {"center_x": 0.5, "center_y": 0.3}
on_release: root.check_data_login()
Screen:
id: screen2
name: 'screen2'
BoxLayout:
orientation: 'vertical'
MDToolbar:
md_bg_color: 0, 0, 1, 1
id: toolbar
title: "Page 2"
BoxLayout:
orientation: 'vertical'
MDTabs:
Tab:
text: "Tab1"
Tab:
text: "Tab2"
出现此错误是因为导航抽屉的用法已更改。请参阅 如果您正在寻找登录示例 这是我之前设计的登录表单（用户名：admin，密码：admin）： login.py
from kivymd.app import MDApp
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.screenmanager import ScreenManager as scr_mngr
from kivymd.toast import toast
from kivy.core.window import Window
from kivymd.uix.tab import MDTabsBase
from kivy.uix.floatlayout import FloatLayout
class Tab(FloatLayout, MDTabsBase):
pass
class MyLayout(BoxLayout):
def check_data_login(self):
self.ids['spinner'].active=True
username = self.ids['username'].text
password = self.ids['password'].text
print(username)
print(password)
if not username and not password:
toast("Username and password are required")
elif not username:
toast("Username is required ")
elif not password:
toast("Password is required")
else:
if username == "admin" and password == "admin":
self.ids['spinner'].active=False
self.change_screen("screen2")
else:
self.ids['spinner'].active=False
toast("Wrong username or password")
def change_screen(self, screen, *args):
self.scr_mngr.current = screen
class DemoApp(MDApp):
pass
if __name__ == '__main__':
Window.show_cursor = True
Window.size = (360, 680)
DemoApp().run()
MyLayout:
scr_mngr: scr_mngr
orientation: 'vertical'
ScreenManager:
id: scr_mngr
Screen:
id: screen1
name: 'screen1'
MDSpinner:
id:spinner
size_hint: None, None
size: dp(46), dp(46)
pos_hint: {'center_x': .5, 'center_y': .5}
active: False
MDToolbar:
md_bg_color: 0, 0, 1, 1
title: "Login Screen"
pos_hint:{"top": 1}
elevation: 11
BoxLayout:
orientation: "vertical"
padding: "16dp"
spacing: "16dp"
size_hint_y: None
height: self.minimum_height
pos_hint: {"center_y": .6}
MDLabel:
text: "Log In"
halign: "center"
font_style: "H4"
size_hint_y: None
MDTextField:
id: username
hint_text: "Username "
helper_text_mode: "on_focus"
required: True
MDTextField:
id: password
hint_text: "Password "
helper_text_mode: "on_focus"
required: True
password: True
MDRaisedButton:
text: "LOGIN"
pos_hint: {"center_x": 0.5, "center_y": 0.3}
on_release: root.check_data_login()
Screen:
id: screen2
name: 'screen2'
BoxLayout:
orientation: 'vertical'
MDToolbar:
md_bg_color: 0, 0, 1, 1
id: toolbar
title: "Page 2"
BoxLayout:
orientation: 'vertical'
MDTabs:
Tab:
text: "Tab1"
Tab:
text: "Tab2"
谢谢你的好解决方案谢谢你的好解决方案