python - 将文本输入保存到 kivy 应用程序中的变量

Question

我正在制作一个基于文本的游戏，游戏有时会要求用户输入他们的姓氏。我已经找到了一种方法将名称保存到文件中，并从文件中加载名称，但我不知道如何保存已输入到变量中的文本。我尝试过网上看到的各种方法，但到目前为止没有一个对我有用。我的相关代码部分目前如下所示:(忽略像 customwidget 这样的奇怪名称，我尝试过一次并让它们保持这样:P)

testing.py 文件:

import kivy
kivy.require("1.9.0")
from kivy.properties import NumericProperty

from kivy.app import App
from kivy.uix.widget import Widget
from kivy.properties import ObjectProperty

class CustomWidget(Widget):
    last_name_text_input = ObjectProperty()
    ego = NumericProperty(0)
    surname = ''

    def submit_surname(self):
        surname = self.last_name_text_input.text

class CustomWidgetApp(App):
    def build(self):
        return CustomWidget()

customWidget = CustomWidgetApp()
customWidget.run()

customwidget.kv 文件:

<CustomWidget>:
    last_name_text_input: last_name
    Label:
        text: "Last Name:"
        pos: 655,400
        size: 100, 30
    TextInput:
        id: last_name
        pos: 760,400
        size: 100, 30
    Button:
        text: "Save Name"
        pos: 870,400
        size: 100, 30
        on_release: root.submit_surname()

这将创建一个如下所示的屏幕:

但是，每当我将姓氏值保存到文件或尝试打印姓氏时，它都不会出现任何结果。如果我能得到有关此问题的一些帮助，我将不胜感激。预先感谢您的帮助:)

Answer 1

您必须将姓氏声明为 StringProperty。请引用下面的例子。

main.py

    from kivy.app import App
    from kivy.uix.widget import Widget
    from kivy.properties import ObjectProperty, NumericProperty, StringProperty


    class CustomWidget(Widget):
        last_name_text_input = ObjectProperty()
        ego = NumericProperty(0)
        surname = StringProperty('')

        def submit_surname(self):
            self.surname = self.last_name_text_input.text
            print("Assign surname: {}".format(self.surname))
            self.save()
            self.surname = ''
            print("Reset surname: {}".format(self.surname))
            self.load()
            print("Loaded surname: {}".format(self.surname))

        def save(self):
            with open("surname.txt", "w") as fobj:
                fobj.write(str(self.surname))

        def load(self):
            with open("surname.txt") as fobj:
                for surname in fobj:
                    self.surname = surname.rstrip()


    class CustomWidgetApp(App):
        def build(self):
            return CustomWidget()

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

自定义小部件.kv

#:kivy 1.10.0

<CustomWidget>:
    last_name_text_input: last_name
    Label:
        text: "Last Name:"
        pos: 655,400
        size: 100, 30
    TextInput:
        id: last_name
        pos: 760,400
        size: 100, 30
    Button:
        text: "Save Name"
        pos: 870,400
        size: 100, 30
        on_release: root.submit_surname()

输出