[英]Error while Adding buttons dynamically to Screen in ScreenManager Kivy
我正在嘗試將按鈕動態添加到屏幕。 運行應用程序時出現以下錯誤。 請幫助我解決問題。
回溯(最近通話最后一個):文件“main.py”,線路174,在screenManager.add_widget(主屏幕(NAME = '主屏幕'))文件“main.py”,線路162,在初始化 self.add_widget(BTN) add_widget pos = self._trigger_layout,AttributeError中的文件“ /Applications/Kivy.app/Contents/Resources/kivy/kivy/uix/floatlayout.py”,第111行,AttributeError:“ HomeScreen”對象沒有屬性“ _trigger_layout”
這是我的main.py
class HomeScreen(Screen):
def __init__(self, **kwargs):
for i in range(80):
btn = Button(text=str(i), size=(90, 90), size_hint=(None, None))
self.add_widget(btn)
# Screen Manager
screenManager = ScreenManager( transition = FadeTransition() )
# Add all screens to screen manager
#screenManager.add_widget( UsernameScreen( name = 'usernameScreen' ) )
#screenManager.add_widget( PasswordScreen( name = 'passwordScreen' ) )
#screenManager.add_widget( LevelTwoScreen( name = 'levelTwoScreen' ) )
#screenManager.add_widget( LevelTwoScreen( name = 'levelThreeScreen' ) )
screenManager.add_widget( HomeScreen( name = 'homeScreen' ) )
class ThreeLevelAuthApp(App):
def build(self):
return screenManager
if __name__ == '__main__':
ThreeLevelAuthApp().run()
獼猴桃文件
<HomeScreen>:
ScrollView:
size_hint: None, None
size: 400, 400
pos_hint: { 'center_x': 0.5,'center_y': 0.5 }
do_scroll_x: False
GridLayout:
cols: 6
padding: 20
spacing: 20
size_hint: None, None
width: 400
讓我們從__init__
開始:
class HomeScreen(Screen):
def __init__(self, **kwargs):
for i in range(80):
btn = Button(text=str(i), size=(90, 90), size_hint=(None, None))
self.add_widget(btn)
盡管這看起來不錯,並且在創建實例時被調用,但還有一個基本的東西-super super()
。 您需要super()
首先初始化Screen
,以便它具有使它成為具有真實行為的類的所有必需的變量和方法,從而使您能夠實際繼承行為。
請注意, Screen
本身是一個RelativeLayout
,如果您不使用適合您的布局,則需要處理其他內容,例如定位和/或調整大小。
import random
class HomeScreen(Screen):
def __init__(self, **kwargs):
super(HomeScreen, self).__init__(**kwargs)
for i in range(80):
btn = Button(text=str(i), size=(90, 90),
size_hint=(None, None),
pos=[random.randint(0,500), random.randint(0,500)])
self.add_widget(btn)
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