Python kivy文本輸入

Question

我是python的新手，現在在做一個字典kivy。問題是當我鍵入文本時，它不起作用。在那裏，我只是想檢查它是否正常工作，所以我放了一些彈出窗口，如果輸入的文本是'a'，然後打印true。這只是檢查它的工作與否，希望你們幫助我，謝謝。

from kivy.app import App 
from kivy.uix.gridlayout import GridLayout 
from kivy.uix.label import Label 
from kivy.uix.textinput import TextInput 
from kivy.uix.button import Button 
from kivy.lang import Builder 
from kivy.uix.popup import Popup 
from kivy.uix.bubble import Bubble 

class CustomPopup(Popup): 
    pass 

class Diction(GridLayout): 

    def __init__(self, **kwargs): 
     super(Diction, self).__init__(**kwargs) 
     self.cols=2 
     self.add_widget(Label(text="Search")) 
     self.search=TextInput(multiline=False) 
     self.add_widget(self.search) 
     if self.search=='A': 
      print 'True' 
     else: 
      print 'False' 
     self.add_widget(Button(text="click",on_press=self.show_popup)) 
    def show_popup(self, b): 
     p = CustomPopup() 
     p.open() 

class MyApp(App): 
    def build(self): 
     return LoginScreen() 

if __name__=="__main__": 
    MyApp().run() 

Answer 1

有兩個原因，爲什麼不工作：

1. 的if應該在處理該事件的方法，即show_popup
2. 你應該比較text在Label，而不是Label本身。取而代之的self.search=='A'，你應該使用self.search.text=='A'

以下是更正__init__和show_popup代碼：

class Diction(GridLayout): 

    def __init__(self, **kwargs): 
     super(Diction, self).__init__(**kwargs) 
     self.cols=2 
     self.add_widget(Label(text="Search")) 
     self.search=TextInput(multiline=False) 
     self.add_widget(self.search) 
     self.add_widget(Button(text="click",on_press=self.show_popup)) 

    def show_popup(self, b): 
     if self.search.text=='A': 
      print 'True' 
     else: 
      print 'False' 
     p = CustomPopup() 
     p.open() 

---

使用Kivy語言

的Kivy可能語言的另一種方法幫助您獲得更乾淨的代碼。您的代碼可能如下所示：

from kivy.app import App 
from kivy.uix.gridlayout import GridLayout 
# DON'T forget to import Label!!! 
from kivy.uix.label import Label 
from kivy.uix.popup import Popup 
from kivy.lang import Builder 

Builder.load_string(""" 
<CustomPopup@Popup>: 
    title: "My Custom Poput"  

<Diction@GridLayout>: 
    cols: 2 
    search: id_search 
    Label: 
     text: "Search" 
    TextInput: 
     id: id_search 
    Button: 
     text: "click" 
     on_press: root.show_popup(self) 
""") 

class CustomPopup(Popup): 
    pass 

class Diction(GridLayout):  
    def show_popup(self, b): 
     if self.search.text=='A': 
      print 'True' 
     else: 
      print 'False' 
    # You can send any content to the popup with the content attribute 
    CustomPopup(content=Label(text=self.search.text)).open() 

class MyApp(App): 
    def build(self): 
     return Diction() 

它有助於保持邏輯與接口分離。如果您使用load_file功能而不是load_string，您甚至可以保存在單獨的文件中。