Html::submitButton($model->isNewRecord ? '添加' : '修改', ['class' => $model->isNewRecord ? 'btn btn-primary' : ' btn-glow primary login'])
在模板中解析后变成
<button type="submit" class="btn btn-primary">添加</button>
或
<button type="submit" class="btn-glow primary login">修改</button>