自定义一个Loading等待Dialog工具类
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
/*
* 自定义Loading等待弹框
* @params text 提示内容
*/
class LoadingDialog extends Dialog {
final String text;
LoadingDialog({Key key, @required this.text}) : super(key: key);
@override
Widget bu
