从 kivy textinput 获取输入

Question

我想在以后的项目中使用它，我只想通过单击 MainScreen 上的按钮打印来自 TextInput 的用户输入，但是当我运行和单击带有文本 "Print Text" 的按钮，没有任何反应，没有错误，也没有输出。

.kv 文件：

#: import FadeTransition kivy.uix.screenmanager.FadeTransition

ScreenManagement:
    transition: FadeTransition()
    MainScreen:
    SecondScreen:

<MainScreen>:
    name: "main"
    Button:
        on_release: root.get_text
        text: "Print Text"
        font_size: 50
        size_hint:0.3,0.1

    TextInput:
        text:"Hello World"
        size_hint: 0.35,0.25
        pos_hint:{"right":1, "top":1}
        color:1,0,0,1
        id: user_text

    Button:
            color: 0,1,0,1
            font_size: 25
            size_hint: 0.3,0.25
            text: "Continue"
            on_release: app.root.current = "other"
            pos_hint:{"right":1, "top":0}


<SecondScreen>:
    name: "other"
    FloatLayout:
        Button:
            color: 0,1,0,1
            font_size: 25
            size_hint: 0.3,0.25
            text: "Back Home"
            on_release: app.root.current = "main"
            pos_hint:{"right":1, "top":1}

python代码：

from kivy.app import App
#kivy.require("1.9.1")
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen , FadeTransition
from kivy.uix.widget import Widget 
from kivy.graphics import Line
from kivy.uix.textinput import TextInput

class MainScreen(Screen):
    def get_text(self,*args):
        textinput= self.ids.user_text
        user=  TextInput.text
        print(user)



class SecondScreen(Screen):
    pass

class ScreenManagement(ScreenManager):
    pass


gui = Builder.load_file("main.kv")


class MainApp(App):
  def build(self):
    return gui


MainApp().run()

Answer 1

当您在 kv 中编码时，您可以直接绑定，就像您调用函数一样

on_release: do_this()

但你没有加括号，就好像它是一个随意的 python 绑定：

self.bind(on_release=do_this)

添加括号，它应该打印：

on_release: root.get_text()

从 kivy textinput 获取输入

getting input from kivy textinput

python-2.7

kivy

kivy-language