kivy入门之布局(四)

本篇不介入kv语言，直接在主程序堆砌控件

from kivy.app import App
from kivy.uix.label import Label
from kivy.core.text import LabelBase
from kivy.uix.textinput import TextInput
from kivy.uix.gridlayout import GridLayout

LabelBase.register("Roboto", "msyhl.ttc")


class LoginScreen(GridLayout):
    """主布局,加入相关控件对象"""

    def __init__(self):
        super().__init__()
        self.cols = 2
        self.add_widget(Label(text="用户名"))
        self.username = TextInput(multiline=False)
        self.add_widget(self.username)
        self.add_widget(Label(text="密码"))
        self.password = TextInput(password=True, multiline=False)
        self.add_widget(self.password)


class Test(App):
    def build(self):
        """重写该方法"""
        # 返回根控件位置
        return LoginScreen()


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

运行界面显示：