在Kivy应用中获取textinput值 [英] Get textinput value in Kivy app
本文介绍了在Kivy应用中获取textinput值的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
Python/Kivy的新手,它试图构建一个带有输入框,确定按钮和标签的测试应用程序,单击确定按钮时应更改文本.但是相反,我得到了"NameError:未定义全局名称'txt1'".我在做什么错了?
New to Python/Kivy trying to build a test app with an input box, an ok button and a label that should change text when the ok button is clicked. But instead I get 'NameError: global name 'txt1' is not defined'. What am I doing wrong?
# import Kivy
import kivy
import random
from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.label import Label
from kivy.uix.textinput import TextInput
# my app
class MyApp(App):
# layout
def build(self):
layout = BoxLayout(padding=10, orientation='vertical')
btn1 = Button(text="OK")
btn1.bind(on_press=self.buttonClicked)
layout.add_widget(btn1)
lbl1 = Label(text="test")
layout.add_widget(lbl1)
txt1 = TextInput(text='', multiline=False)
layout.add_widget(txt1)
return layout
# button click function
def buttonClicked(self,btn):
lbl1.text = "You wrote " + txt1.text
# run app
if __name__ == "__main__":
MyApp().run()
推荐答案
使用self.txt1, self.lbl1
等.
class MyApp(App):
# layout
def build(self):
layout = BoxLayout(padding=10, orientation='vertical')
btn1 = Button(text="OK")
btn1.bind(on_press=self.buttonClicked)
layout.add_widget(btn1)
self.lbl1 = Label(text="test")
layout.add_widget(self.lbl1)
self.txt1 = TextInput(text='', multiline=False)
layout.add_widget(self.txt1)
return layout
# button click function
def buttonClicked(self,btn):
self.lbl1.text = "You wrote " + self.txt1.text
# run app
if __name__ == "__main__":
MyApp().run()
# join all items in a list into 1 big string
使用:
def buttonClicked(self,btn):
lbl1.text = "You wrote " + txt1.text <- only exists in the build method
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