[英]Getting TextInput value with ScreenManager in Kivy 1.10 and Python 2.7.9
在Python 2.7.9中使用Kivy 1.10.0和Python 2.7.9时,我试图获取用户在单击Button(my_button2)时输入的TextInput值。尽管我已经能够使用GridLayout进行此操作,但看来我正在使用的方法是无法与BoxManager一起使用ScreenManager。 收到的错误是:AttributeError:当my_button2时,“ ScreenTwo”对象没有属性“ inpt”
单击“下一屏”按钮后,将带我到用户输入文本值的页面,并且“打印”按钮应将其打印出来
请看下面:
import kivy
from kivy.app import App
from kivy.uix.screenmanager import Screen, ScreenManager
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.button import Button
from kivy.uix.textinput import TextInput
class ScreenOne(Screen):
def __init__ (self,**kwargs):
super (ScreenOne, self).__init__(**kwargs)
my_box1 = BoxLayout(orientation='vertical')
my_button1 = Button(text="Next Screen ",size_hint_y=None,size_y=100)
my_button1.bind(on_press=self.changer)
my_box1.add_widget(my_button1)
self.add_widget(my_box1)
def changer(self,*args):
self.manager.current = 'screen2'
class ScreenTwo(Screen):
def __init__(self,**kwargs):
super (ScreenTwo,self).__init__(**kwargs)
layout = BoxLayout(orientation='vertical')
self.add_widget(layout)
inpt = TextInput(text="Some text ",size_y=50)
layout.add_widget(inpt)
my_button2 = Button(text="Print ")
my_button2.bind(on_press=self.click)
layout.add_widget(my_button2)
Home_btn = Button(text="Back")
Home_btn.bind(on_press=self.home)
layout.add_widget(Home_btn)
def click(self,my_button2):
entered_value = self.inpt.text
print entered_value
def home(self,*args):
self.manager.current = 'screen1'
class TestApp(App):
def build(self):
my_screenmanager = ScreenManager()
screen1 = ScreenOne(name='screen1')
screen2 = ScreenTwo(name='screen2')
my_screenmanager.add_widget(screen1)
my_screenmanager.add_widget(screen2)
return my_screenmanager
if __name__ == '__main__':
TestApp().run()
第二屏
当您使用self时,您尝试访问该类的成员,但是在inpt中,它不是变量,因为它是任何变量,如果您想成为该类的成员,则必须提出self,在您的情况下进行更改:
inpt = TextInput(text="Some text ",size_y=50)
layout.add_widget(inpt)
至:
self.inpt = TextInput(text="Some text ",size_y=50)
layout.add_widget(self.inpt)
注意: 如果您不会遇到很多此类问题,建议您阅读OOP基础知识。
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