python - 在 Kivy 中将文本从文本输入传递到标签

Question

我试图让文本输入小部件将文本传递到回调函数中，该回调函数在打印按钮调用时使用文本制作标签，当您考虑一下时，应该相当简单。但我有只见树木、不见森林的习惯。无论如何，如果有人能弄清楚这一点，那么就将其编码:P

import kivy
kivy.require('1.5.1')
from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.button import Button
from kivy.uix.gridlayout import GridLayout
from kivy.uix.textinput import TextInput

class kivyentrywidget(GridLayout):

    def __init__(self, **kwargs):
        super(kivyentrywidget, self).__init__(**kwargs)
        self.cols = 2
        self.add_widget(Label(text='What do you want to print?'))
        self.text_input = TextInput(multiline=False)
        self.add_widget(self.text_input)
        self.printbutton = Button(text='Print')
        self.printbutton.bind(on_press=callback)
        self.add_widget(self.printbutton)

    def callback(self):
        return Label(text=self.text_input.text)



class Firstapp(App):
    def build(self):
        return kivyentrywidget()

if __name__ == '__main__':
    Firstapp().run()

Answer 1

def callback(self,evt=None): #not sure if kivy sends event info so added optional arg just in case
    return self.add_widget(Label(text=self.text_input.text))

也许...不太熟悉kivy，但我认为这样就可以了..

还有

self.printbutton.bind(on_press=self.callback)

应该可以解决您的其他问题