swipe_back 0.0.2

iOS-style full screen back swipe gesture for Flutter. Enables swiping from anywhere on the screen to navigate back, not just the left edge.

example/lib/main.dart

import 'package:flutter/cupertino.dart' hide CupertinoPageRoute;
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:swipe_back/swipe_back.dart';

void main() {
  SystemChrome.setSystemUIOverlayStyle(
    const SystemUiOverlayStyle(
      statusBarColor: Colors.transparent,
      statusBarIconBrightness: Brightness.dark,
    ),
  );
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Swipe Back',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        brightness: Brightness.light,
        scaffoldBackgroundColor: const Color(0xFFF2F2F7),
        primaryColor: const Color(0xFF007AFF),
        appBarTheme: const AppBarTheme(
          backgroundColor: Color(0xFFF2F2F7),
          elevation: 0,
          scrolledUnderElevation: 0,
          iconTheme: IconThemeData(color: Color(0xFF007AFF)),
          titleTextStyle: TextStyle(
            color: Colors.black,
            fontSize: 17,
            fontWeight: FontWeight.w600,
            letterSpacing: -0.4,
          ),
        ),
        pageTransitionsTheme: const PageTransitionsTheme(
          builders: {
            TargetPlatform.iOS: SwipeBackPageTransitionsBuilder(),
            TargetPlatform.android: SwipeBackPageTransitionsBuilder(),
            TargetPlatform.macOS: SwipeBackPageTransitionsBuilder(),
            TargetPlatform.windows: SwipeBackPageTransitionsBuilder(),
          },
        ),
      ),
      darkTheme: ThemeData(
        brightness: Brightness.dark,
        scaffoldBackgroundColor: const Color(0xFF000000),
        primaryColor: const Color(0xFF0A84FF),
        appBarTheme: const AppBarTheme(
          backgroundColor: Color(0xFF000000),
          elevation: 0,
          scrolledUnderElevation: 0,
          iconTheme: IconThemeData(color: Color(0xFF0A84FF)),
          titleTextStyle: TextStyle(
            color: Colors.white,
            fontSize: 17,
            fontWeight: FontWeight.w600,
            letterSpacing: -0.4,
          ),
        ),
        pageTransitionsTheme: const PageTransitionsTheme(
          builders: {
            TargetPlatform.iOS: SwipeBackPageTransitionsBuilder(),
            TargetPlatform.android: SwipeBackPageTransitionsBuilder(),
            TargetPlatform.macOS: SwipeBackPageTransitionsBuilder(),
            TargetPlatform.windows: SwipeBackPageTransitionsBuilder(),
          },
        ),
      ),
      home: const HomeScreen(),
    );
  }
}

class HomeScreen extends StatelessWidget {
  const HomeScreen({super.key});

  @override
  Widget build(BuildContext context) {
    final isDark = Theme.of(context).brightness == Brightness.dark;

    return Scaffold(
      body: CustomScrollView(
        slivers: [
          SliverAppBar(
            expandedHeight: 120,
            pinned: true,
            flexibleSpace: FlexibleSpaceBar(
              titlePadding:
                  const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
              title: Text(
                'Settings',
                style: TextStyle(
                  color: isDark ? Colors.white : Colors.black,
                  fontWeight: FontWeight.w700,
                  letterSpacing: -0.5,
                ),
              ),
            ),
          ),
          SliverToBoxAdapter(
            child: Padding(
              padding:
                  const EdgeInsets.symmetric(horizontal: 16.0, vertical: 8.0),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(
                    'SWIPE BACK DEMO',
                    style: TextStyle(
                      fontSize: 13,
                      fontWeight: FontWeight.w400,
                      color: isDark ? Colors.white54 : Colors.black54,
                    ),
                  ),
                  const SizedBox(height: 8),
                  Container(
                    decoration: BoxDecoration(
                      color: isDark ? const Color(0xFF1C1C1E) : Colors.white,
                      borderRadius: BorderRadius.circular(10),
                    ),
                    child: Column(
                      children: [
                        _SettingsTile(
                          icon: CupertinoIcons.profile_circled,
                          iconColor: Colors.blue,
                          title: 'Account Profiles',
                          onTap: () => Navigator.push(
                            context,
                            CupertinoPageRoute(
                              builder: (context) =>
                                  const DetailScreen(title: 'Account Profiles'),
                              title: 'Profiles',
                            ),
                          ),
                        ),
                        _Divider(),
                        _SettingsTile(
                          icon: CupertinoIcons.settings,
                          iconColor: Colors.grey,
                          title: 'General Settings',
                          onTap: () => Navigator.push(
                            context,
                            MaterialPageRoute(
                              builder: (context) =>
                                  const DetailScreen(title: 'General Settings'),
                            ),
                          ),
                        ),
                        _Divider(),
                        _SettingsTile(
                          icon: CupertinoIcons.hand_draw,
                          iconColor: Colors.purple,
                          title: 'Gesture Playground',
                          onTap: () => Navigator.push(
                            context,
                            CupertinoPageRoute(
                              builder: (context) => const DetailScreen(
                                  title: 'Gesture Playground'),
                              title: 'Gestures',
                            ),
                          ),
                        ),
                      ],
                    ),
                  ),
                  const SizedBox(height: 16),
                  Padding(
                    padding: const EdgeInsets.symmetric(horizontal: 16.0),
                    child: Text(
                      'This example demonstrates the SwipeBackPageTransitionsBuilder allowing you to swipe back from anywhere on the screen.',
                      style: TextStyle(
                        fontSize: 13,
                        fontWeight: FontWeight.w400,
                        color: isDark ? Colors.white54 : Colors.black54,
                      ),
                    ),
                  ),
                ],
              ),
            ),
          ),
        ],
      ),
    );
  }
}

class _SettingsTile extends StatelessWidget {
  final IconData icon;
  final Color iconColor;
  final String title;
  final VoidCallback onTap;

  const _SettingsTile({
    required this.icon,
    required this.iconColor,
    required this.title,
    required this.onTap,
  });

  @override
  Widget build(BuildContext context) {
    final isDark = Theme.of(context).brightness == Brightness.dark;

    return InkWell(
      onTap: onTap,
      borderRadius: BorderRadius.circular(10),
      child: Padding(
        padding: const EdgeInsets.symmetric(horizontal: 16.0, vertical: 12.0),
        child: Row(
          children: [
            Container(
              padding: const EdgeInsets.all(6),
              decoration: BoxDecoration(
                color: iconColor,
                borderRadius: BorderRadius.circular(8),
              ),
              child: Icon(icon, color: Colors.white, size: 18),
            ),
            const SizedBox(width: 16),
            Expanded(
              child: Text(
                title,
                style: const TextStyle(
                  fontSize: 17,
                  letterSpacing: -0.4,
                  fontWeight: FontWeight.w400,
                ),
              ),
            ),
            Icon(
              CupertinoIcons.chevron_right,
              color: isDark ? const Color(0xFF3A3A3C) : const Color(0xFFC7C7CC),
              size: 18,
            ),
          ],
        ),
      ),
    );
  }
}

class _Divider extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final isDark = Theme.of(context).brightness == Brightness.dark;
    return Padding(
      padding: const EdgeInsets.only(left: 54.0),
      child: Divider(
        height: 1,
        thickness: 0.5,
        color: isDark ? const Color(0xFF38383A) : const Color(0xFFC6C6C8),
      ),
    );
  }
}

class DetailScreen extends StatelessWidget {
  final String title;

  const DetailScreen({super.key, required this.title});

  @override
  Widget build(BuildContext context) {
    final isDark = Theme.of(context).brightness == Brightness.dark;

    return Scaffold(
      appBar: AppBar(
        title: Text(title),
      ),
      body: Center(
        child: Padding(
          padding: const EdgeInsets.all(32),
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              Container(
                padding: const EdgeInsets.all(24),
                decoration: BoxDecoration(
                  color: isDark ? const Color(0xFF1C1C1E) : Colors.white,
                  shape: BoxShape.circle,
                  boxShadow: [
                    BoxShadow(
                      color: Colors.black.withAlpha(13),
                      blurRadius: 20,
                      offset: const Offset(0, 10),
                    ),
                  ],
                ),
                child: Icon(
                  CupertinoIcons.hand_draw_fill,
                  size: 64,
                  color: Theme.of(context).primaryColor,
                ),
              ),
              const SizedBox(height: 32),
              const Text(
                'Swipe Right',
                textAlign: TextAlign.center,
                style: TextStyle(
                  fontSize: 28,
                  fontWeight: FontWeight.w700,
                  letterSpacing: -0.5,
                ),
              ),
              const SizedBox(height: 12),
              Text(
                'You can swipe from anywhere on this screen to go back to the previous screen, not just the left edge.',
                textAlign: TextAlign.center,
                style: TextStyle(
                  fontSize: 16,
                  color: isDark ? Colors.white54 : Colors.black54,
                  height: 1.4,
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}