flutter状态管理、Provide

引入自行看官方
main.dart

void main() {
     SystemUiOverlayStyle light = SystemUiOverlayStyle(
    statusBarColor: Colors.transparent,
  );
  SystemChrome.setSystemUIOverlayStyle(light);//设置系统状态栏颜色
 /*
providers数据格式如下
List<SingleChildWidget> providers = [
ChangeNotifierProvider(create: (_)=>XinXingProvide())
];

*/
  runApp(
     MultiProvider(providers: providers,//
  child: MyApp(),
  )
    );
   
}

provider页面

import 'package:flutter/cupertino.dart';
import 'package:flutter/foundation.dart';

class XinXingProvide with ChangeNotifier,DiagnosticableTreeMixin {
   int _count = 0;
  int get count => _count;
   void increment() {//增加函数
    _count++;
    notifyListeners();//通知界面更新
  }
}