我正在尝试动态添加按钮到屏幕 . 运行应用程序时出现以下错误 . 请帮我解决这个问题 .
回溯(最近一次调用最后一次):文件“main.py”,第174行,在screenManager.add_widget(HomeScreen(name ='homeScreen'))文件“main.py”,第162行,在init self.add_widget(btn) )文件“/Applications/Kivy.app/Contents/Resources/kivy/kivy/uix/floatlayout.py”,第111行,在add_widget中pos = self._trigger_layout,AttributeError:'HomeScreen'对象没有属性'_trigger_layout'
这是我的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()
kivy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
1 回答
让我们从
__init__
开始:虽然这看起来很好并且在你创建一个实例时被调用,但是缺少一个基本的东西 -
super()
. 首先需要super()
来初始化Screen
,这样它就拥有了所有必需的变量和方法,使它成为具有真实行为的类,因此能够实际继承行为 .请注意,
Screen
本身是RelativeLayout,您使用的布局可以为您执行此操作 .