trackoffical_app/lib/widget/will_exit_after_2_back.dart

import 'dart:io';

import 'package:flutter/material.dart';
import 'package:get/get.dart';


class WillExitAfter2BackController extends GetxController{
  DateTime? lastPressedAt; //上次点击时间
}
class WillExitAfter2Back extends GetView<WillExitAfter2BackController>{
  const WillExitAfter2Back({super.key, required this.child});
  final Widget child;

  @override
  Widget build(BuildContext context) {
    return GetBuilder<WillExitAfter2BackController>(
        init: WillExitAfter2BackController(),
        builder: (c){
        return WillPopScope(
          onWillPop:  () async {
            if (c.lastPressedAt == null ||
                DateTime.now().difference(c.lastPressedAt!) > const Duration(seconds: 2)) {
              //两次点击间隔超过1秒则重新计时
              c.lastPressedAt = DateTime.now();
              ScaffoldMessenger.of(context).showSnackBar(SnackBar(
                content: const Text('再按一次退出'),
                duration: 2.seconds,
              ));
              return false;
            }
            // return true;
            exit(0);
          },
          child: child,
        );
    });
  }

}