我并不熟悉screenmanager类的使用,因为我无法使用名称"标题4"切换到屏幕。虽然我将当前屏幕设置为"标题4"。由于某些奇怪的原因,当前屏幕保持不变("标题2")。我试图使用AnotherScreen(Screen)类中的ok_button_hit()方法切换屏幕。有人指出我在这里犯的错误吗?
ABC.py文件:
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import ObjectProperty
from kivy.uix.popup import Popup
from kivy.uix.textinput import TextInput
from kivy.uix.screenmanager import ScreenManager, Screen, FadeTransition
from kivy.uix.listview import ListItemButton
check_id=0
menu=''
class FoodListButton(ListItemButton):
pass
class ScreenManagement(ScreenManager):
pass
class LoginScreen(Screen):
username_input = ObjectProperty()
passwd_input = ObjectProperty()
def __init__(self, **kwargs):
super(LoginScreen, self).__init__(**kwargs)
self.boxp = BoxLayout(orientation='vertical')
self.labs = Label(text='')
self.boxp.add_widget(self.labs)
self.box = BoxLayout()
self.box.orientation = 'horizontal'
btn5 = Button(text="ok", size_hint=(0.5, 0.5))
btn5.bind(on_release=self.success)
self.box.add_widget(btn5)
self.box.add_widget(Button(text='cancel', size_hint=(0.5, 0.5), on_release=self.cancel_button_hit))
self.boxp.add_widget(self.box)
self.popup1 = Popup(title="LOGIN SUCCESSFUL",
content=self.boxp,
size=(200, 200),
size_hint=(0.3, 0.3),
auto_dismiss=True)
def checkin(self):
if self.username_input.text == "root" and self.passwd_input.text == "root":
self.labs.text = self.username_input.text
self.popup1.open()
else:
self.popup1.title = 'Failed Login'
self.labs.text = 'Failed'
self.popup1.open()
def cancel_button_hit(self, instance):
self.popup1.dismiss()
def success(self, instance):
self.popup1.dismiss()
self.manager.current = 'Title 2'
class AnotherScreen(Screen):
def __init__(self, **kwargs):
super(AnotherScreen, self).__init__(**kwargs)
self.boxp = BoxLayout(orientation='vertical')
self.labs = TextInput(multiline=False)
self.boxp.add_widget(self.labs)
self.box = BoxLayout()
self.box.orientation = 'horizontal'
btn5 = Button(text="OK", size_hint=(0.5, 0.5), on_release=self.ok_button_hit)
self.box.add_widget(btn5)
self.box.add_widget(Button(text='cancel', size_hint=(0.5, 0.5), on_release=self.cancel_button_hit))
self.boxp.add_widget(self.box)
self.popup1 = Popup(title="Enter Customer ID",
content=self.boxp,
size=(400, 400),
size_hint=(0.3, 0.3),
auto_dismiss=False)
self.popup2 = Popup(title="Failed",
content=Label(text='''You don't seem to have a customer id.
Please check in first'''),
size=(400, 400),
size_hint=(0.3, 0.3),
auto_dismiss=True)
def check_cust_id(self):
self.custid = self.labs.text
#check with database
if True:
return True
else:
return False
def cancel_button_hit(self, instance):
self.popup1.dismiss()
def ok_button_hit(self, instance):
if self.check_cust_id():
self.popup1.dismiss()
global menu
k='Title'+menu
print(k)
self.manager.current = k
else:
self.popup1.dismiss()
self.popup2.open()
self.popup1.dismiss()
def res_clicked(self):
global menu
menu = ' 4'
self.popup1.open()
def lan_clicked(self):
self.popup1.open()
global menu
menu = ' 5'
def game_clicked(self):
self.popup1.open()
global menu
menu += ' 6'
def checkout_clicked(self):
self.popup1.open()
global menu
menu += ' 7'
def check_in(self):
self.manager.current = 'Title 3'
class Res_Page(Screen):
total_food_bill = 0
food_input = ObjectProperty()
food_list = ObjectProperty()
def __init__(self, **kwargs):
super(Res_Page, self).__init__(**kwargs)
self.boxp = BoxLayout(orientation='vertical')
self.labs = Label(text=" ")
self.boxp.add_widget(self.labs)
self.box = BoxLayout()
self.box.orientation = 'horizontal'
btn5 = Button(text="OK", size_hint=(0.5, 0.5), on_release=self.ok_button_hit)
self.box.add_widget(btn5)
self.popup1 = Popup(title="Food Bill",
content=self.boxp,
size=(200, 200),
size_hint=(0.3, 0.3),
auto_dismiss=False)
self.popup2 = Popup(title="Error",
content=Label(text='''Sorry we don't make that'''),
size=(200, 200),
size_hint=(0.3, 0.3),
auto_dismiss=True)
def ok_button_hit(self, instance):
self.popup1.dismiss()
self.manager.current = 'Title 2'
def submit_food(self):
food_name = self.food_input.text
# Check if food is present
if (True):
self.food_list.adapter.data.extend([food_name])
self.food_list._trigger_reset_populate()
# Retreive price and subtract from total amount
else:
self.popup2.open()
def delete_food(self, *args):
if self.food_list.adapter.selection:
selection = self.food_list.adapter.selection[0].text
# Check if food is present
if (True):
self.food_list.adapter.data.remove(selection)
self.student_list._trigger_reset_populate()
# Retreive price and subtract from total amount
else:
self.popup2.open()
def bill_food(self):
self.labs.text = str(self.total_food_bill)
self.popup1.open()
class checkinscrn(Screen):
def checkin_nextscr(self):
self.manager.current = 'Title 4'
class checkinadv(Screen):
pass
class MainApp(App):
def build(self):
self.root = Builder.load_file('ABC.kv')
my_screenmanager = ScreenManager()
screen1 = LoginScreen(name='Title 1')
screen2 = AnotherScreen(name='Title 2')
screen3 = checkinscrn(name='Title 3')
screen4 = AnotherScreen(name='Title 4')
screen14 = checkinadv(name='Title 14')
my_screenmanager.add_widget(screen1)
my_screenmanager.add_widget(screen2)
my_screenmanager.add_widget(screen3)
my_screenmanager.add_widget(screen4)
#my_screenmanager.add_widget(screen14)
return my_screenmanager
MainApp().run()
ABC.kv文件:
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#: import FadeTransition kivy.uix.screenmanager.FadeTransition
<ScreenManagement>:
transition: FadeTransition()
LoginScreen:
AnotherScreen:
Res_Page:
checkinscrn:
checkinadv:
<LoginScreen>:
name: 'Title 1'
orientation: "vertical"
username_input: username
passwd_input: passwd
padding: 10
spacing: 10
BoxLayout:
padding:[10,50]
spacing: 40
orientation: "vertical"
Label:
text: "Username"
size_hint_x: 0.4
size_hint_y: 0
size: [200, 50]
font_size: 20
pos_hint: {'left_x': 1, 'center_y': 0.5}
TextInput:
id: username
size_hint_x: 0.4
size_hint_y: 0
size: [400, 75]
pos_hint: {'center_x': 0.5, 'center_y': 0.5}
Label:
text: "Password"
size_hint_x: 0.4
size_hint_y: 0
size: [200, 50]
font_size: 20
pos_hint: {'left_x': 0, 'center_y': 0.5}
TextInput:
id: passwd
password: True
size_hint_x: 0.4
size_hint_y: 0
size: [400, 75]
pos_hint: {'center_x': 0.5, 'center_y': 0.5}
Button:
on_release: root.checkin()
text: 'Login'
font_size: 50
size_hint_x: 0.4
size_hint_y: 0
size: [400, 75]
font_size: 20
pos_hint: {'center_x': 0.5, 'center_y': 0.5}
<AnotherScreen>:
name: 'Title 2'
orientation: "vertical"
padding: 10
spacing: 10
BoxLayout:
padding:[10,50]
spacing: 40
orientation: "vertical"
Button:
on_release: root.check_in()
text: 'Check In'
font_size: 50
size_hint_x: 0.4
size_hint_y: 0
size: [400, 45]
font_size: 20
pos_hint: {'center_x': 0.5, 'center_y': 0.5}
Button:
on_release: root.res_clicked()
text: 'Restaurant'
font_size: 50
size_hint_x: 0.4
size_hint_y: 0
size: [400, 45]
font_size: 20
pos_hint: {'center_x': 0.5, 'center_y': 0.5}
Button:
on_release: root.lan_clicked()
text: 'Laundry'
font_size: 50
size_hint_x: 0.4
size_hint_y: 0
size: [400, 45]
font_size: 20
pos_hint: {'center_x': 0.5, 'center_y': 0.5}
Button:
on_release: root.game_clicked()
text: 'Gaming'
font_size: 50
size_hint_x: 0.4
size_hint_y: 0
size: [400, 45]
font_size: 20
pos_hint: {'center_x': 0.5, 'center_y': 0.5}
Button:
on_release: root.checkout_clicked()
text: 'Check Out'
font_size: 50
size_hint_x: 0.4
size_hint_y: 0
size: [400, 45]
font_size: 20
pos_hint: {'center_x': 0.5, 'center_y': 0.5}
Button:
on_release: app.root.current = 'Title 1'
text: 'Log Out'
font_size: 50
size_hint_x: 0.4
size_hint_y: 0
size: [400, 45]
font_size: 20
pos_hint: {'center_x': 0.5, 'center_y': 0.5}
<Res_Page>:
name: 'Title 4'
orientation: "vertical"
food_input: food_name
food_list: food_list_view
padding: 10
spacing: 10
BoxLayout:
size_hint_y: None
height: "40dp"
Label:
text: "Dish"
TextInput:
id: food_name
BoxLayout:
size_hint_y: None
height: "40dp"
Button:
text: "Submit"
size_hint_x: 15
on_press: root.submit_food()
Button:
text: "Delete"
size_hint_x: 15
on_press: root.delete_food()
Button:
text: "Generate Bill"
size_hint_x: 15
on_press: root.bill_food()
ListView:
id: students_list_view
adapter:
ListAdapter(data=[], cls=main.FoodListButton)
<checkinscrn>:
name: 'Title 3'
orientation: "vertical"
padding: 10
spacing: 10
name_input: name
address_input: addr
checkin_input: cin
checkout_input: cout
BoxLayout:
padding:[10,50]
spacing: 40
orientation: "vertical"
Label:
text: 'ENTER NAME'
size_hint_x: 0.4
size_hint_y: 0
size: [50, 25]
font_size: 20
pos_hint: {'center_x': 0.5, 'center_y': 0.5}
TextInput:
id: name
size_hint_x: 0.5
size_hint_y: 0
size: [50, 25]
pos_hint: {'center_x': 0.5, 'center_y': 0.5}
Label:
text: 'ENTER ADDRESS'
size_hint_x: 0.5
size_hint_y: 0
size: [50, 25]
font_size: 20
pos_hint: {'center_x': 0.5, 'center_y': 0.5}
TextInput:
id: addr
size_hint_x: 0.5
size_hint_y: 0
size: [50, 25]
pos_hint: {'center_x': 0.5, 'center_y': 0.5}
Label:
text: 'ENTER CHECK IN DATE'
size_hint_x: 0.5
size_hint_y: 0
size: [50, 25]
font_size: 20
pos_hint: {'center_x': 0.5, 'center_y': 0.5}
TextInput:
id: cin
size_hint_x: 0.5
size_hint_y: 0
size: [50, 25]
pos_hint: {'center_x': 0.5, 'center_y': 0.5}
Label:
text: 'ENTER CHECK OUT DATE'
size_hint_x: 0.5
size_hint_y: 0
size: [50, 25]
font_size: 20
pos_hint: {'center_x': 0.5, 'center_y': 0.5}
TextInput:
id: cout
size_hint_x: 0.5
size_hint_y: 0
size: [50, 25]
pos_hint: {'center_x': 0.5, 'center_y': 0.5}
Button:
on_release: root.checkin_nextscr()
text: 'CHECK IN'
font_size: 50
size_hint_x: 0.4
size_hint_y: 0
size: [50, 25]
font_size: 20
pos_hint: {'center_x': 0.5, 'center_y': 0.5}
<checkinadv>:
name: 'Title 14'
orientation: "vertical"
padding: 10
spacing: 10
BoxLayout:
padding:[10,50]
spacing: 40
orientation: "vertical"
Label:
text: 'your check in id is'
size_hint_x: 0.4
size_hint_y: 0
size: [50, 25]
font_size: 20
pos_hint: {'center_x': 0.5, 'center_y': 0.5}
答案 0 :(得分:1)
在MainApp.build()
方法中,您创建了一个名为Title 4
的屏幕,但您要创建另一个AnotherScreen
,而不是Res_Page
。因此切换到Title 4
正在切换到另一个AnotherScreen