坏：在 kivy 中使用循环时冻结应用程序

Question

当我在kivy应用中使用循环以显示循环的更新值时，我有问题，因此，当我运行应用程序并按Toggle按钮开始显示Loop I Program Crash的最后值。
这是代码：

*.py

from kivy.app import App
from kivy.clock import Clock
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import StringProperty
from random import randint


class ShowLoopValueInterface(BoxLayout):
    ToggleButton_label = StringProperty("normal")
    Label_text_value = StringProperty("normal")

    def togglebutton_on_state(self, widget):
        if widget.state == "down":
            self.ToggleButton_label = "down"
            # self.to_text_value()
            Clock.schedule_interval(self.to_text_value, 0.5)
        else:
            self.ToggleButton_label = "normal"
    def to_text_value(self, _):
    # def to_text_value(self):
        while True:
            self.Label_text_value = str(randint(0, 100))


class ShowLoopValueApp(App):
    pass


ShowLoopValueApp().run()

*.kv

ShowLoopValueInterface:
<ShowLoopValueInterface>:
    orientation: "vertical"
    ToggleButton:
        text: root.ToggleButton_label
        on_state: root.togglebutton_on_state(self)
    Label:
        text: root.Label_text_value