在Kivy中声明后无效的数据

Question

我不明白为什么在运行代码时出现此类错误。我已经多次检查了这一切，一切似乎都很好，代码仍然不想运行。

这是我的__main__.py文件：

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.anchorlayout import AnchorLayout
from kivy.properties import ObjectProperty  # at top of file

class AccountDetailsForm(AnchorLayout):

    server_box = ObjectProperty()
    username_box = ObjectProperty()
    password_box = ObjectProperty()

    def login(self):
        print(self.server_box.text)
        print(self.username_box.text)
        print(self.password_box.text)


class Orkiv(App):
    pass

Orkiv().run()

这是我的orkiv.kv文件：

AccountDetailsForm:

<AccountDetailsForm>:
    anchor_y: "top"
    server_box: server_input
    username_box: username_input
    password_box: password_input

    BoxLayout:
        orientation: "vertical"
        height: "200dp"
        size_hint_y: None

        GridLayout:
            cols: 2
            row_default_height: "40dp"
            row_force_default: True
            spacing: "10dp"
            padding: "10dp"
        Label:
            text: "Server" //THE ERROR SEEMS TO HAPPEN HERE
        AccountDetailsTextInput:
            id: server_input
        Label:
            text: "Username"
        AccountDetailsTextInput:
            id: username_input
        Label:
            text: "Password"
        AccountDetailsTextInput:
            password: True
            id: password_input

    Button:
        size_hint_y: None
        height: "40dp"
        text: "Login"
        on_press: root.login()

有什么想法吗？感谢。

Answer 1

在orkiv.kv文件中，将AccountDetailsTextInput更改为TextInput。

AccountDetailsForm:

<AccountDetailsForm>:

    anchor_y: "top"
    server_box: server_input
    username_box: username_input
    password_box: password_input

    BoxLayout:

        orientation: "vertical"
        height: "200dp"
        size_hint_y: None

        GridLayout:
            cols: 2
            row_default_height: "40dp"
            row_force_default: True
            spacing: "10dp"
            padding: "10dp"

        Label:
            text: "Server"

        TextInput:
            id: server_input

        Label:
            text: "Username"

        TextInput:
            id: username_input

        Label:
            text: "Password"

        TextInput:
            password: True
            id: password_input

    Button:

        size_hint_y: None
        height: "40dp"
        text: "Login"
        on_press: root.login()

该应用应该运行。请参阅下面的输出。

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