Kivy - 如何访问python中的kivy部件?
问题描述:
我想在基维的TextInput中编辑文本,但不知道如何,我试过这段代码,因为我在网上搜索,但仍然没有运气。Kivy - 如何访问python中的kivy部件?
class MainApp(Screen):
def __init__(self,**kwargs):
super(MainApp,self).__init__(**kwargs)
pass
class Forms(BoxLayout):
def __init__(self, **kwargs):
super(Main,self).__init__(**kwargs)
self.ids.txtSearch.text = "new text"
class Main(App):
def build(self):
return root_widget
if __name__ == "__main__":
Main().run()
------kivy-------
<Main>:
TextInput:
id: txtSearch
这不是我的全部代码,但我认为这些都是在发行
这个重要的是错误:
File "C:\Users\Guest\Documents\Python\Kivy\Project\main.py", line 295, in <module>
''')
File "D:\Kivy-1.9.0-py3.4-win32-x64\kivy34\kivy\lang.py", line 1828, in load_string
self._apply_rule(widget, parser.root, parser.root)
File "D:\Kivy-1.9.0-py3.4-win32-x64\kivy34\kivy\lang.py", line 1985, in _apply_rule
self.apply(child)
File "D:\Kivy-1.9.0-py3.4-win32-x64\kivy34\kivy\lang.py", line 1872, in apply
self._apply_rule(widget, rule, rule)
File "D:\Kivy-1.9.0-py3.4-win32-x64\kivy34\kivy\lang.py", line 1986, in _apply_rule
self._apply_rule(child, crule, rootrule)
File "D:\Kivy-1.9.0-py3.4-win32-x64\kivy34\kivy\lang.py", line 1986, in _apply_rule
self._apply_rule(child, crule, rootrule)
File "D:\Kivy-1.9.0-py3.4-win32-x64\kivy34\kivy\lang.py", line 1983, in _apply_rule
child = cls(__no_builder=True)
File "C:\Users\Guest\Documents\Python\Kivy\Project\main.py", line 40, in __init__
self.ids.txtSearch.text = "new text"
File "kivy\properties.pyx", line 720, in kivy.properties.ObservableDict.__getattr__ (kivy\properties.c:10911)
AttributeError: 'super' object has no attribute '__getattr__'
答
确定self.ids.txtSearch
存在,当你尝试指派text
它?你打电话super(Main,self)
上面一行,所以我猜txtSearch
永远不会实例化。
顺便说一句,这是更好地初始化小部件*.kv
文件:
<Main>:
TextInput:
id: txtSearch
text: "new text"
答
要更改窗口小部件的属性在kivy你需要“链接”的.py和.kv文件之间的小部件,首先在.py文件:
txt_Search = ObjectProperty()
然后在.kv文件,在你的根小部件:
txt_Search: txtSearch
则ID分配给widg等(因为你已经做了):
self.txt_Search.text = 'New Text'
或任何其他属性:
self.txt_Search.height = '30dp'
<Main>:
TextInput:
id: txtSearch
text: ' '
然后在你的.py文件,你可以这样做改变控件的属性
oops a mistype,thats Forms class – Shivr
所以'kv'文件应该相应地改变:':'...虽然你可能想要'Forms:',以实际实例化一个小部件。 –
zeeMonkeez
如果您发布[mcve],您更有可能获得有用的答案。 – zeeMonkeez