58 lines
1.6 KiB
Dart
58 lines
1.6 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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/**
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* 首页 加载页
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*/
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class LoadingPage extends StatefulWidget {
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@override
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_LoadingPageState createState() => _LoadingPageState();
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}
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class _LoadingPageState extends State<LoadingPage> {
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//0 未登录 ,1 已登录
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void initData() async {
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final prefs = await SharedPreferences.getInstance(); //获取SP的实例
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int loginStatus=prefs.getInt('loginStatus') ?? 0;
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print(prefs.getInt('current_num'));
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if(loginStatus == 0){
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Navigator.of(context).pushReplacementNamed("login");
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}else{
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loginStatus=1;
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Navigator.of(context).pushReplacementNamed("app");
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}
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/*prefs.setInt('current_num', 999); //存储数据
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var currentNum = prefs.getInt('current_num') ?? 0; //读取数据，默认为0
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print('读取数据 $currentNum');
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prefs.remove('current_num');//删除数据
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var delCurrentNum = prefs.getInt('current_num') ?? 0; //读取数据，默认为0
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print('删除数据 $delCurrentNum');*/
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}
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@override
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void initState() {
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super.initState();
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//加载页默认停留三秒
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Future.delayed(Duration(seconds: 3),(){
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print("仿微信app页面正在加载中");
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//判断是否登录,如果没有登陆则跳转至登录页,如果登录则跳转至聊天页
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initData();
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});
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}
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@override
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Widget build(BuildContext context) {
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return new Center(
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child: Stack(
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children: <Widget>[
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//加载页面居中背景图使用 cover 模式
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Image. asset("assets/images/loading.jpg", fit: BoxFit.cover,),
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],
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),
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);
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}
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}
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