界面

代码：

这里引入了dash_bootstrap_components 进行界面美化 ，要记一些className，也不是原来说的不用写CSS了。

from dash import Dash, html, dcc, callback, Output, Input, State
import dash_bootstrap_components as dbc

app = Dash(__name__, external_stylesheets=[dbc.themes.BOOTSTRAP])

app.layout = dbc.Container(
    [
        dbc.Row(dbc.Col(html.H1("登录页"), width=12)),
        dbc.Row(
            [
                dbc.Col(html.Label("手机号："), width=2),
                dbc.Col(dcc.Input(id='input-phone', type='text', placeholder='请输入11位手机号'), width=10),
            ],
            className="mb-3",
        ),
        dbc.Row(
            [
                dbc.Col(html.Label("密码："), width=2),
                dbc.Col(dcc.Input(id='input-password', type='password', placeholder='请输入6位密码'), width=10),
            ],
            className="mb-3",
        ),
        dbc.Row(
            dbc.Col(html.Button('登录', id='login-button', className="btn btn-primary"), width=12),
            className="mb-3",
        ),
        dcc.Store(id='toast-store', data={'is_open': False, 'message': ''}),
        dbc.Row(
            dbc.Col(html.Div(id='toast-container', children='', className="alert alert-warning"), width=12),
            className="mb-3",
        ),
    ],
    className="mt-5",
)

@app.callback(
    [Output('toast-store', 'data'),
     Output('toast-container', 'children')],
    [Input('login-button', 'n_clicks')],
    [State('input-phone', 'value'),
     State('input-password', 'value')]
)
def check_login(n_clicks, phone='', password=''):

    if n_clicks is None:
        message = ''
        return {'is_open': True, 'message': message}, message
    else:
        # 这里可以添加具体的登录验证逻辑
        # 为了演示，此处只是简单判断手机号和密码是否都是数字
        if phone is None or password is None:
            message = '手机号或密码格式不正确，请重新输入！'
            return {'is_open': True, 'message': message}, message

        if not phone.isdigit() or not password.isdigit():
            message = '手机号或密码格式不正确，请重新输入！'
            return {'is_open': True, 'message': message}, message
        else:
            message = '登录成功！'
            return {'is_open': True, 'message': message}, message
if __name__ == '__main__':
    app.run_server(debug=True)