Add examples for a splash screen

CHANGELOG.md

@@ -1,3 +1,6 @@
+## [1.2.1]
+- Fix: Revert Cubic to `PathInterpolator.cubic`
+
 ## [1.2.0]
 - Add support for gaussian blurs.
 

example/ios/Flutter/AppFrameworkInfo.plist

@@ -21,6 +21,6 @@
   <key>CFBundleVersion</key>
   <string>1.0</string>
   <key>MinimumOSVersion</key>
-  <string>8.0</string>
+  <string>9.0</string>
 </dict>
 </plist>

example/ios/Podfile

@@ -10,78 +10,32 @@ project 'Runner', {
   'Release' => :release,
 }
 
-def parse_KV_file(file, separator='=')
+def flutter_root
-  file_abs_path = File.expand_path(file)
+  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
-  if !File.exists? file_abs_path
+  unless File.exist?(generated_xcode_build_settings_path)
-    return [];
+    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
   end
-  generated_key_values = {}
+
-  skip_line_start_symbols = ["#", "/"]
+  File.foreach(generated_xcode_build_settings_path) do |line|
-  File.foreach(file_abs_path) do |line|
+    matches = line.match(/FLUTTER_ROOT\=(.*)/)
-    next if skip_line_start_symbols.any? { |symbol| line =~ /^\s*#{symbol}/ }
+    return matches[1].strip if matches
-    plugin = line.split(pattern=separator)
-    if plugin.length == 2
-      podname = plugin[0].strip()
-      path = plugin[1].strip()
-      podpath = File.expand_path("#{path}", file_abs_path)
-      generated_key_values[podname] = podpath
-    else
-      puts "Invalid plugin specification: #{line}"
-    end
   end
-  generated_key_values
+  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
 end
 
+require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)
+
+flutter_ios_podfile_setup
+
 target 'Runner' do
   use_frameworks!
   use_modular_headers!
 
-  # Flutter Pod
+  flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
-
-  copied_flutter_dir = File.join(__dir__, 'Flutter')
-  copied_framework_path = File.join(copied_flutter_dir, 'Flutter.framework')
-  copied_podspec_path = File.join(copied_flutter_dir, 'Flutter.podspec')
-  unless File.exist?(copied_framework_path) && File.exist?(copied_podspec_path)
-    # Copy Flutter.framework and Flutter.podspec to Flutter/ to have something to link against if the xcode backend script has not run yet.
-    # That script will copy the correct debug/profile/release version of the framework based on the currently selected Xcode configuration.
-    # CocoaPods will not embed the framework on pod install (before any build phases can generate) if the dylib does not exist.
-
-    generated_xcode_build_settings_path = File.join(copied_flutter_dir, 'Generated.xcconfig')
-    unless File.exist?(generated_xcode_build_settings_path)
-      raise "Generated.xcconfig must exist. If you're running pod install manually, make sure flutter pub get is executed first"
-    end
-    generated_xcode_build_settings = parse_KV_file(generated_xcode_build_settings_path)
-    cached_framework_dir = generated_xcode_build_settings['FLUTTER_FRAMEWORK_DIR'];
-
-    unless File.exist?(copied_framework_path)
-      FileUtils.cp_r(File.join(cached_framework_dir, 'Flutter.framework'), copied_flutter_dir)
-    end
-    unless File.exist?(copied_podspec_path)
-      FileUtils.cp(File.join(cached_framework_dir, 'Flutter.podspec'), copied_flutter_dir)
-    end
-  end
-
-  # Keep pod path relative so it can be checked into Podfile.lock.
-  pod 'Flutter', :path => 'Flutter'
-
-  # Plugin Pods
-
-  # Prepare symlinks folder. We use symlinks to avoid having Podfile.lock
-  # referring to absolute paths on developers' machines.
-  system('rm -rf .symlinks')
-  system('mkdir -p .symlinks/plugins')
-  plugin_pods = parse_KV_file('../.flutter-plugins')
-  plugin_pods.each do |name, path|
-    symlink = File.join('.symlinks', 'plugins', name)
-    File.symlink(path, symlink)
-    pod name, :path => File.join(symlink, 'ios')
-  end
 end
 
 post_install do |installer|
   installer.pods_project.targets.each do |target|
-    target.build_configurations.each do |config|
+    flutter_additional_ios_build_settings(target)
-      config.build_settings['ENABLE_BITCODE'] = 'NO'
-    end
   end
 end

example/ios/Podfile.lock

@@ -2,27 +2,21 @@ PODS:
   - Flutter (1.0.0)
   - path_provider (0.0.1):
     - Flutter
-  - path_provider_macos (0.0.1):
-    - Flutter
 
 DEPENDENCIES:
   - Flutter (from `Flutter`)
   - path_provider (from `.symlinks/plugins/path_provider/ios`)
-  - path_provider_macos (from `.symlinks/plugins/path_provider_macos/ios`)
 
 EXTERNAL SOURCES:
   Flutter:
     :path: Flutter
   path_provider:
     :path: ".symlinks/plugins/path_provider/ios"
-  path_provider_macos:
-    :path: ".symlinks/plugins/path_provider_macos/ios"
 
 SPEC CHECKSUMS:
-  Flutter: 0e3d915762c693b495b44d77113d4970485de6ec
+  Flutter: 50d75fe2f02b26cc09d224853bb45737f8b3214a
-  path_provider: fb74bd0465e96b594bb3b5088ee4a4e7bb1f2a9d
+  path_provider: abfe2b5c733d04e238b0d8691db0cfd63a27a93c
-  path_provider_macos: f760a3c5b04357c380e2fddb6f9db6f3015897e0
 
-PODFILE CHECKSUM: c34e2287a9ccaa606aeceab922830efb9a6ff69a
+PODFILE CHECKSUM: aafe91acc616949ddb318b77800a7f51bffa2a4c
 
-COCOAPODS: 1.9.1
+COCOAPODS: 1.11.2

example/ios/Runner.xcodeproj/project.pbxproj

@@ -264,12 +264,10 @@
 			);
 			inputPaths = (
 				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh",
-				"${PODS_ROOT}/../Flutter/Flutter.framework",
 				"${BUILT_PRODUCTS_DIR}/path_provider/path_provider.framework",
 			);
 			name = "[CP] Embed Pods Frameworks";
 			outputPaths = (
-				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/Flutter.framework",
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/path_provider.framework",
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -313,7 +311,6 @@
 /* Begin XCBuildConfiguration section */
 		249021D3217E4FDB00AE95B9 /* Profile */ = {
 			isa = XCBuildConfiguration;
-			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_ANALYZER_NONNULL = YES;
@@ -353,7 +350,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SUPPORTED_PLATFORMS = iphoneos;
@@ -391,7 +388,6 @@
 		};
 		97C147031CF9000F007C117D /* Debug */ = {
 			isa = XCBuildConfiguration;
-			baseConfigurationReference = 9740EEB21CF90195004384FC /* Debug.xcconfig */;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_ANALYZER_NONNULL = YES;
@@ -437,7 +433,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
@@ -447,7 +443,6 @@
 		};
 		97C147041CF9000F007C117D /* Release */ = {
 			isa = XCBuildConfiguration;
-			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_ANALYZER_NONNULL = YES;
@@ -487,7 +482,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SUPPORTED_PLATFORMS = iphoneos;

example/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata

@@ -2,6 +2,6 @@
 <Workspace
    version = "1.0">
    <FileRef
-      location = "group:Runner.xcodeproj">
+      location = "self:">
    </FileRef>
 </Workspace>

example/lib/examples/splash_screen.dart

@@ -0,0 +1,56 @@
+import 'package:flutter/material.dart';
+import 'package:logging/logging.dart';
+import 'package:lottie/lottie.dart';
+
+// This example show how to use a Lottie animation as a SplashScreen for your application
+// Since animation are loaded from the assets and can take a few milliseconds to
+// load, we instruct flutter to defer the first frame until when the animation
+// is actually ready to be displayed.
+void main() async {
+  Logger.root
+    ..level = Level.ALL
+    ..onRecord.listen(print);
+
+  runApp(const SplashScreen());
+}
+
+class SplashScreen extends StatefulWidget {
+  const SplashScreen({Key? key}) : super(key: key);
+
+  @override
+  _SplashScreenState createState() => _SplashScreenState();
+}
+
+class _SplashScreenState extends State<SplashScreen>
+    with TickerProviderStateMixin {
+  @override
+  void initState() {
+    super.initState();
+    WidgetsBinding.instance!.deferFirstFrame();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      color: Colors.lightBlue,
+      home: Scaffold(
+        backgroundColor: Colors.lightBlue,
+        appBar: AppBar(
+          title: const Text('Splash screen'),
+        ),
+        body: SingleChildScrollView(
+          child: Center(
+            child: Column(
+              children: [
+                Lottie.asset('assets/AndroidWave.json',
+                    onLoaded: (composition) {
+                  WidgetsBinding.instance!.allowFirstFrame();
+                }),
+              ],
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}

example/lib/examples/splash_screen_alt.dart

@@ -0,0 +1,86 @@
+import 'dart:typed_data';
+
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:logging/logging.dart';
+import 'package:lottie/lottie.dart';
+
+void main() async {
+  Logger.root
+    ..level = Level.ALL
+    ..onRecord.listen(print);
+
+  runApp(const MaterialApp(
+    color: Colors.lightBlue,
+    home: App(),
+  ));
+}
+
+class App extends StatefulWidget {
+  const App({Key? key}) : super(key: key);
+
+  @override
+  _AppState createState() => _AppState();
+}
+
+class _AppState extends State<App> with TickerProviderStateMixin {
+  late Future<Uint8List> _lottieAnimation;
+
+  @override
+  void initState() {
+    super.initState();
+
+    // Start loading the animation in background here
+    _lottieAnimation = _loadAnimation();
+  }
+
+  Future<Uint8List> _loadAnimation() async {
+    var asset = await rootBundle.load('assets/AndroidWave.json');
+    return asset.buffer.asUint8List();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      backgroundColor: Colors.lightBlue,
+      appBar: AppBar(
+        title: const Text('Splash screen'),
+      ),
+      body: Center(
+        child: ElevatedButton(
+          onPressed: () async {
+            var bytes = await _lottieAnimation;
+            await Navigator.push<void>(
+              context,
+              MaterialPageRoute(
+                builder: (context) => AnimationScreen(
+                  animationBytes: bytes,
+                ),
+              ),
+            );
+          },
+          child: const Text('Open splash'),
+        ),
+      ),
+    );
+  }
+}
+
+class AnimationScreen extends StatelessWidget {
+  final Uint8List animationBytes;
+
+  const AnimationScreen({Key? key, required this.animationBytes})
+      : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text('Animation'),
+      ),
+      body: Center(
+        child: Lottie.memory(animationBytes),
+      ),
+    );
+  }
+}

example/pubspec.lock

@@ -7,14 +7,14 @@ packages:
       name: archive
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.1.2"
+    version: "3.1.6"
   async:
     dependency: transitive
     description:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.5.0"
+    version: "2.8.1"
   boolean_selector:
     dependency: transitive
     description:
@@ -35,7 +35,7 @@ packages:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.1"
   clock:
     dependency: transitive
     description:
@@ -89,14 +89,14 @@ packages:
       name: flutter_colorpicker
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.5.0"
+    version: "0.6.1"
   flutter_lints:
     dependency: "direct dev"
     description:
       name: flutter_lints
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.3"
+    version: "1.0.4"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -108,14 +108,14 @@ packages:
       name: golden_toolkit
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.9.0"
+    version: "0.11.0"
   http:
     dependency: "direct main"
     description:
       name: http
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.13.3"
+    version: "0.13.4"
   http_parser:
     dependency: transitive
     description:
@@ -136,14 +136,14 @@ packages:
       name: logging
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.1"
+    version: "1.0.2"
   lottie:
     dependency: "direct main"
     description:
       path: ".."
       relative: true
     source: path
-    version: "1.2.0"
+    version: "1.2.1"
   matcher:
     dependency: transitive
     description:
@@ -157,7 +157,7 @@ packages:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0"
+    version: "1.7.0"
   path:
     dependency: transitive
     description:
@@ -171,21 +171,21 @@ packages:
       name: path_provider
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.2"
+    version: "2.0.6"
   path_provider_linux:
     dependency: transitive
     description:
       name: path_provider_linux
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.1.1"
   path_provider_macos:
     dependency: transitive
     description:
       name: path_provider_macos
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.0.2"
   path_provider_platform_interface:
     dependency: transitive
     description:
@@ -199,35 +199,28 @@ packages:
       name: path_provider_windows
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.1"
+    version: "2.0.4"
-  pedantic:
-    dependency: transitive
-    description:
-      name: pedantic
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.11.1"
   platform:
     dependency: transitive
     description:
       name: platform
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.0"
+    version: "3.0.2"
   plugin_platform_interface:
     dependency: transitive
     description:
       name: plugin_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.0.2"
   process:
     dependency: transitive
     description:
       name: process
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.2.1"
+    version: "4.2.4"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -274,7 +267,7 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.0"
+    version: "0.4.2"
   typed_data:
     dependency: transitive
     description:
@@ -295,7 +288,7 @@ packages:
       name: win32
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.2.5"
+    version: "2.2.10"
   xdg_directories:
     dependency: transitive
     description:
@@ -304,5 +297,5 @@ packages:
     source: hosted
     version: "0.2.0"
 sdks:
-  dart: ">=2.13.0 <3.0.0"
+  dart: ">=2.14.0 <3.0.0"
-  flutter: ">=1.20.0"
+  flutter: ">=2.5.0"

lib/src/parser/keyframe_parser.dart

@@ -302,7 +302,7 @@ class KeyframeParser {
 
     interpolator = _pathInterpolatorCache.putIfAbsent(hash, () {
       try {
-        return Cubic(cp1.dx, cp1.dy, cp2.dx, cp2.dy);
+        return PathInterpolator.cubic(cp1.dx, cp1.dy, cp2.dx, cp2.dy);
       } catch (e) {
         debugPrint('DEBUG: Path interpolator error $e');
         //TODO(xha): check the error message for Flutter

pubspec.yaml

@@ -1,6 +1,6 @@
 name: lottie
 description: Render After Effects animations natively on Flutter. This package is a pure Dart implementation of a Lottie player.
-version: 1.2.0
+version: 1.2.1
 homepage: https://github.com/xvrh/lottie-flutter
 
 environment: