使用Windows.size（）定义窗口大小

总目录

在build()函数中，可以使用Windows.size()函数定义应用窗口大小

        测试代码如下：

from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.popup import Popup
from kivy.uix.label import Label
from kivy.uix.textinput import TextInput
from kivy.core.window import Window

class CustomWindowApp(App):

    def build(self):
        # 设置窗口的宽度和高度
        Window.size = (400, 600)
        self.layout = FloatLayout()
        self.button = Button(text='button')
        self.button.bind(on_press=self.show_popup)
        self.layout.add_widget(self.button)
        return self.layout

    def show_popup(self, instance):
        content = Label(text="this is a popups")

        self.popup = Popup(title="标题",
                           content=content,
                           size_hint=(None, None),
                           size=(400, 200))

        self.popup.open()

if __name__ == '__main__':
    CustomWindowApp().run()