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我正在尝试使用 kivy 创建 GUI，但无法计算出这个。创建的弹出屏幕并尝试从 dropbox 中选择值并将此值添加到我的 TextInput 中。

测试.py：

    from kivy.app import App
    from kivy.uix.textinput import TextInput
    from kivy.uix.dropdown import DropDown
    from kivy.uix.spinner import Spinner
    from kivy.uix.screenmanager import ScreenManager,Screen
    from kivy.uix.popup import Popup
    from kivy.properties import ObjectProperty
    
    class MyDropDown(DropDown):
        def on_select(self, data):
            print('Selected value:',data)
            #Lets add this data to TextInput ?
            MyTextInput.text = data
            #Lets check is that actual text ?
            print('MyTextInput.text is:',MyTextInput.text)
            #HOW CAN I ADD THIS TEXT TEXTINPUT AFTER THAT?
    
    class MySpinner(Spinner):
        dropdown_cls = ObjectProperty(MyDropDown)
    
    class MyTextInput(TextInput):
        pass
    
    class MyTestPopup(Popup):
        my_popup_spinner = ObjectProperty()
        my_textinput_id = ObjectProperty()
    
    class TestPage(Screen):
        MypagePopup = ObjectProperty()
        def open_my_popup(self, *args):
            #Lets create my popup
            self.MypagePopup = MyTestPopup()
            self.MypagePopup.my_popup_spinner.values = ['Test1','Test2','Test3','Test4','Test']
            self.MypagePopup.open()
    
    class TestPageManager(ScreenManager):
        pass
    
    class test(App):
        def build(self):
           return TestPageManager()
    
    if __name__=='__main__':
        test().run()

测试.kv：

<TestPageManager>:
    TestPage:
        name: 'mainpagename'
<MySpinner>:
    text: 'Pick Value'
<MyDropDown>:
    values: ['Test1','Test2','Test3','Test4','Test5']
<MyTextInput>:
<MyTestPopup>:
    my_popup_spinner : my_popup_spinner
    my_textinput_id : my_textinput_id
    BoxLayout:
        orientation: 'vertical'
        Label:
            text: 'Testing Label Area..'
            pos: self.pos
            size: self.size
        MyTextInput:
            id: my_textinput_id
        MySpinner:
            id: my_popup_spinner
        Button:
            text: 'Done'
            on_release:
                print('MyTextInput id is :',my_textinput_id.text)
<TestPage>:
    Button:
        text: 'Open Popup'
        on_release: root.open_my_popup()

如您所见，我创建了那个 GUI。

但是在从微调器中选择后无法更新 TextInput。如何在从 dropbox 中选择值后更新此文本输入。我想不通。我想我正确地描述了我的问题。感谢阅读和回答。

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1 回答 1

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kv = "微调器：

        on_text:

              my_textinput_id.text = my_popup_spinner.text"

在我的 Builder.load_string(kv) 的 kv 字符串中做了这个，它对我有用，你可以尝试在你的代码示例中实现它，看看它是否有效。

将 textinput = 的 id.text 设置为我的微调器 id.text 在 on_text: 微调器的事件

于 2020-06-25T05:24:30.127 回答