spinner widget crashes my kivy app on start

huangapple
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英文:

spinner widget crashes my kivy app on start

问题

I was working on a kivy(2.1.0) and added a spinner widget when I tried to run the app it crashed on startup. it works without the spinner widget. my code:

the .kv file:

  1. <GridLayout>
  2.     cols: 2
  3.     rows: 8
  4.     Label:
  5.         text: "name:"
  6.         row: 0
  7.         col: 0
  8.     TextInput:
  9.         id: name
  10.         multiline: False
  11.         row:0
  12.         col:1
  13.         on_text: 
  14.             if len(self.text.strip()) >= 31: self.text = self.text[0:30]
  15.     Label:
  16.         text: "description:"
  17.         row: 1
  18.         col: 0
  19.     TextInput:
  20.         id: description
  21.         multiline: False
  22.         row:1
  23.         col:1
  24.         on_text: 
  25.             if len(self.text.strip()) >= 100: self.text = self.text[0:99]
  26.     Spinner:
  27.         text: "hi"
  28.         values: ("hi1","hi2")

my python file:

  1. from kivy.app import App
  2. from kivy.uix.gridlayout import GridLayout
  3. from kivy.uix.textinput import TextInput
  4. from kivy.uix.button import Button
  5. from kivy.uix.spinner import Spinner
  8. class SkinAssent(App):
  9.     def __init__(self, **kwargs):
  10.         super(SkinAssent, self).__init__(**kwargs)
  12.     def build(self):
  13.         return GridLayout()
  16. def main():
  17.     SkinAssent().run()
  20. if __name__ == '__main__':
  21.     main()

a window pops for a second up then I get this error:

  1.    File "C:\Usersmyrc\AppData\Local\Programs\Python\Python310\lib\site-packages\kivy\lang\builder.py", line 558, in _apply_rule
  2.      assert(rule not in self.rulectx)
  3.  AssertionError

Thanks, myrccar

英文:

I was working on a kivy(2.1.0) and added a spinner widget when I tried to run the app it crashed on startup. it works without the spinner widget. my code:

the .kv file:

  1. &lt;GridLayout&gt;
  2.     cols: 2
  3.     rows: 8
  4.     Label:
  5.         text: &quot;name:&quot;
  6.         row: 0
  7.         col: 0
  8.     TextInput:
  9.         id: name
  10.         multiline: False
  11.         row:0
  12.         col:1
  13.         on_text: 
  14.             if len(self.text.strip()) &gt;= 31: self.text = self.text[0:30]
  15.     Label:
  16.         text: &quot;description:&quot;
  17.         row: 1
  18.         col: 0
  19.     TextInput:
  20.         id: description
  21.         multiline: False
  22.         row:1
  23.         col:1
  24.         on_text: 
  25.             if len(self.text.strip()) &gt;= 100: self.text = self.text[0:99]
  26.     Spinner:
  27.         text: &quot;hi&quot;
  28.         values: (&quot;hi1&quot;,&quot;h12&quot;)
  29.

my python file:

  1. from kivy.app import App
  2. from kivy.uix.gridlayout import GridLayout
  3. from kivy.uix.textinput import TextInput
  4. from kivy.uix.button import Button
  5. from kivy.uix.spinner import Spinner
  8. class SkinAssent(App):
  9.     def __init__(self, **kwargs):
  10.         super(SkinAssent, self).__init__(**kwargs)
  12.     def build(self):
  13.         return GridLayout()
  16. def main():
  17.     SkinAssent().run()
  20. if __name__ == &#39;__main__&#39;:
  21.     main()

a window pops for a second up then i get this error:

  1.    File &quot;C:\Usersmyrc\AppData\Local\Programs\Python\Python310\lib\site-packages\kivy\lang\builder.py&quot;, line 558, in _apply_rule
  2.      assert(rule not in self.rulectx)
  3.  AssertionError

thanks, myrccar

答案1

得分: 1

我相信GridLayout类存在某种冲突。尝试使用自定义类。您可以定义一个自定义类：

  1. class MyGridLayout(GridLayout):
  2.     pass

然后在您的kv文件中使用该自定义类：

  1. <MyGridLayout>:
  2.     cols: 2
  3.     rows: 8
  4.     Label:

以及在您的build()方法中：

  1. def build(self):
  2.     return MyGridLayout()
英文:

I believe there is some kind of conflict with the GridLayout class. Try using a custom class. You can define a custom class:

  1. class MyGridLayout(GridLayout):
  2.     pass

Then use that custom class in your kv:

  1. &lt;MyGridLayout&gt;
  2.     cols: 2
  3.     rows: 8
  4.     Label:

and in your build() method:

  1. def build(self):
  2.     return MyGridLayout()

huangapple
  • 本文由 发表于 2023年2月10日 07:09:24
  • 转载请务必保留本文链接：https://go.coder-hub.com/75405407.html
  • kivy
  • kivy-language
  • python
  • python-3.x
  • user-interface
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