flutter使用shared_preferences本地存储基础信息

1. 根据自己项目选择适合的shared_preferences版本
   

2. 建通用的storage.dart文件

import 'package:shared_preferences/shared_preferences.dart';

class Storage {
  static Future<void> setString(key, value) async {
    SharedPreferences sp = await SharedPreferences.getInstance();
    sp.setString(key, value);
  }

  static Future<String> getString(key) async {
    SharedPreferences sp = await SharedPreferences.getInstance();
    return sp.getString(key);
  }

  static Future<void> remove(key) async {
    SharedPreferences sp = await SharedPreferences.getInstance();
    sp.remove(key);
  }

  static Future<void> clear() async {
    SharedPreferences sp = await SharedPreferences.getInstance();
    sp.clear();
  }
}

3. 调用，set数据，例如登录成功返回处理

 void _loginHandle() async {
    var res = await Http.post(ApiPath.login, {
      "mobile": _controller.text,
      "smsCode": _controller2.text,
      "smsCodeId": _codeId
    });
    if (res["code"] == 20000) {
      await Storage.setString('userToken', res["data"]["token"]);  //set数据
  	}
  }

4. 调用，获取

    import 'package:cai_customer/service/Storage.dart';
	var token = await Storage.getString('userToken');