dating_touchme_app/lib/widget/double_tap_to_exit_widget.dart

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';

class DoubleTapToExitWidget extends StatefulWidget {
  final Widget child;
  final Duration duration;

  const DoubleTapToExitWidget(
      {super.key,
      required this.child,
      this.duration = const Duration(seconds: 1)});

  @override
  State<DoubleTapToExitWidget> createState() => DoubleTapToExitWidgetState();
}

class DoubleTapToExitWidgetState extends State<DoubleTapToExitWidget> {
  DateTime? lastPressedAt;

  @override
  Widget build(BuildContext context) {
    return PopScope(
        canPop: false,
        onPopInvokedWithResult: (bool didPop, Object? result) async {
          final now = DateTime.now();
          if (lastPressedAt == null ||
              now.difference(lastPressedAt!) >= widget.duration) {
            setState(() {
              lastPressedAt = now;
            });
            SmartDialog.showToast('再按一次退出');
          } else {
            SystemNavigator.pop();
          }
        },
        child: widget.child);
  }
}