您的代码有几个问题：
- The
__init__()任何方法Widget当您创建该实例时调用Widget。所以__init__()的方法FirstRound被称为在线WindowManager.add_widget(FirstRound())。此时还无法输入任何文本TextInput of WelcomeWindow，所以你无法获取当时的玩家名字。
- 的创建
Player实例 （self.player1 = Player(name_input_player_i.text)）创建Player在用户有机会输入玩家姓名之前的实例。
- 指某东西的用途
WelcomeWindow() in the __init__()的方法FirstRound创建一个新实例WelcomeWindow这与你的 GUI 中的无关。因此从该实例中提取的任何信息都是没有用的。
- In your
FirstRound，玩家点标签从Player当时的类实例Label被建造。改变points的属性Player之后不会有任何影响Label.
第一个问题可以通过将大部分代码移出__init__()的方法FirstRound，并将其放入on_enter()时运行的方法Screen被展示。
第二个问题可以通过移动创建Player实例进入go_further()方法，因为它在离开时执行WelcomeWindow.
第三个问题可以通过替换这些用途来解决WelcomeWindow() with self.manager.get_screen('welcomewindow')访问实际实例WelcomeWindow那是在你的 GUI 中。
这是代码的修改版本，它执行这三件事：
from kivy.app import App
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.uix.textinput import TextInput
from kivy.uix.gridlayout import GridLayout
from kivy.uix.button import Button
from kivy.uix.label import Label
class Player:
def __init__(self, name):
self.name = name
self.points = 0
def reset_points(self):
self.points = 0
def add_point(self, *args):
self.points += 1
def subtract_point(self, *args):
self.points -= 1
class WelcomeWindow(Screen):
# Introduce names of the 4 players
def __init__(self, **kwargs):
super(WelcomeWindow, self).__init__(**kwargs)
self.name = "welcomewindow"
self.layout = "layout_welcome_window"
global_layout = GridLayout(rows=3)
self.add_widget(global_layout)
label_player_i = Label(text="Name Player ")
global_layout.add_widget(label_player_i)
self.name_input_player_i = TextInput(id="player ", text="player", multiline=False) # <--- user inputs name here
global_layout.add_widget(self.name_input_player_i)
# Create button to go to next screen
go_further_button = Button(text="Go to first round")
go_further_button.bind(on_release=self.go_further)
global_layout.add_widget(go_further_button)
def go_further(self, *args):
self.player1 = Player(self.name_input_player_i.text) # <--- name is assigned to player here
self.manager.current = "firstround"
self.manager.transition.direction = "left"
class FirstRound(Screen):
#Give explanation of first round + option to add points for every player
def __init__(self, **kwargs):
super(FirstRound, self).__init__(**kwargs)
self.name = "firstround"
self.layout = "layout_first_round"
def on_enter(self, *args):
#Create layout
global_layout = GridLayout(rows=4)
self.add_widget(global_layout)
#Create Labels
welcome_window = self.manager.get_screen('welcomewindow') # get a reference to the WelcomeWindow instance
label_player_name_i = Label(text=welcome_window.player1.name) # <--- Label should get the name of the player here
global_layout.add_widget(label_player_name_i)
label_player_points_i = Label(text=str(welcome_window.player1.points)) # <--- Label should get points of player
global_layout.add_widget((label_player_points_i))
#Create Buttons
button_minus = Button(text="-", font_size=100, id="minus_button")
button_minus.bind(on_release=welcome_window.player1.subtract_point) # <--- When button pushed: should subtract point
global_layout.add_widget(button_minus)
button_plus = Button(text="+", font_size=100, id="plus_button")
button_plus.bind(on_release=welcome_window.player1.add_point) # <--- When button pushed: should add point
global_layout.add_widget(button_plus)
WindowManager = ScreenManager()
WindowManager.add_widget(WelcomeWindow())
WindowManager.add_widget(FirstRound())
class KingenApp(App):
def build(self):
return WindowManager
if __name__ == "__main__":
KingenApp().run()
第四个问题本身值得一个问题，但可能涉及使用 kivy 语言。
