将文本输入保存到kivy应用程序中的变量 [英] Save text input to a variable in a kivy app

问题描述

我正在制作一款基于文本的游戏，游戏有时会要求用户输入其姓氏.我已经找到了一种将名称保存到文件并从文件中加载名称的方法，但是我不知道如何将输入的文本保存到变量中.我尝试了网上看到的各种方法，但到目前为止，没有一种方法对我有用.我所讨论的代码部分当前如下所示:(忽略诸如customwidget之类的奇数名称，我尝试了一次，然后像这样:P离开了它们)

I am making a text based game, and there is a point at which the game asks the user to input their surname. I have worked out a way to save the name to a file, and load the name from the file, but I do not know how to save the text that has been input into a variable. I have tried various methods i have seen online, but none have worked for me so far. The section of my code in question currently looks like this: (ignore the odd names like customwidget, i was experimenting once and left them like that :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()

这将创建一个类似这样的屏幕:

This creates a screen like this:

但是，每当我将姓氏值保存到文件或尝试打印姓氏时，它都不会显示任何内容.如果能在此问题上获得一些帮助，将不胜感激.预先感谢您的帮助:)

However, whenever I save the surname value to the file or try to print surname, it comes up with nothing. It would be greatly appreciated if I could recieve some help with this issue. Thanks in advance for any help :)

推荐答案

您必须将姓氏声明为StringProperty.请参考下面的示例.

You have to declare surname as StringProperty. Please refer to the example below.

    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()

customwidget.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

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