Call ensureInitialized before executing onBootComplete handle

.gitignore

@@ -8,4 +8,5 @@ build/
 .idea/
 
 *.lock
-example/ios/
+example/ios/
+example/.flutter-plugins-dependencies

ios/.gitignore

@@ -0,0 +1,37 @@
+.idea/
+.vagrant/
+.sconsign.dblite
+.svn/
+
+.DS_Store
+*.swp
+profile
+
+DerivedData/
+build/
+GeneratedPluginRegistrant.h
+GeneratedPluginRegistrant.m
+
+.generated/
+
+*.pbxuser
+*.mode1v3
+*.mode2v3
+*.perspectivev3
+
+!default.pbxuser
+!default.mode1v3
+!default.mode2v3
+!default.perspectivev3
+
+xcuserdata
+
+*.moved-aside
+
+*.pyc
+*sync/
+Icon?
+.tags*
+
+/Flutter/Generated.xcconfig
+/Flutter/flutter_export_environment.sh

ios/Classes/BootCompletedPlugin.h

@@ -0,0 +1,4 @@
+#import <Flutter/Flutter.h>
+
+@interface BootCompletedPlugin : NSObject<FlutterPlugin>
+@end

ios/Classes/BootCompletedPlugin.m

@@ -0,0 +1,15 @@
+#import "BootCompletedPlugin.h"
+#if __has_include(<boot_completed/boot_completed-Swift.h>)
+#import <boot_completed/boot_completed-Swift.h>
+#else
+// Support project import fallback if the generated compatibility header
+// is not copied when this plugin is created as a library.
+// https://forums.swift.org/t/swift-static-libraries-dont-copy-generated-objective-c-header/19816
+#import "boot_completed-Swift.h"
+#endif
+
+@implementation BootCompletedPlugin
++ (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar {
+  [SwiftBootCompletedPlugin registerWithRegistrar:registrar];
+}
+@end

ios/Classes/SwiftBootCompletedPlugin.swift

@@ -0,0 +1,14 @@
+import Flutter
+import UIKit
+
+public class SwiftBootCompletedPlugin: NSObject, FlutterPlugin {
+  public static func register(with registrar: FlutterPluginRegistrar) {
+    let channel = FlutterMethodChannel(name: "boot_completed", binaryMessenger: registrar.messenger())
+    let instance = SwiftBootCompletedPlugin()
+    registrar.addMethodCallDelegate(instance, channel: channel)
+  }
+
+  public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
+    result("iOS " + UIDevice.current.systemVersion)
+  }
+}

ios/boot_completed.podspec

@@ -0,0 +1,23 @@
+#
+# To learn more about a Podspec see http://guides.cocoapods.org/syntax/podspec.html.
+# Run `pod lib lint boot_completed.podspec' to validate before publishing.
+#
+Pod::Spec.new do |s|
+  s.name             = 'boot_completed'
+  s.version          = '0.0.1'
+  s.summary          = 'A new flutter plugin project.'
+  s.description      = <<-DESC
+A new flutter plugin project.
+                       DESC
+  s.homepage         = 'http://example.com'
+  s.license          = { :file => '../LICENSE' }
+  s.author           = { 'Your Company' => 'email@example.com' }
+  s.source           = { :path => '.' }
+  s.source_files = 'Classes/**/*'
+  s.dependency 'Flutter'
+  s.platform = :ios, '8.0'
+
+  # Flutter.framework does not contain a i386 slice. Only x86_64 simulators are supported.
+  s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES', 'VALID_ARCHS[sdk=iphonesimulator*]' => 'x86_64' }
+  s.swift_version = '5.0'
+end

lib/boot_completed.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 
 import 'package:flutter/services.dart';
+import 'package:flutter/widgets.dart';
 
 import 'package:path_provider/path_provider.dart' as path_provider;
 import 'dart:io';
@@ -32,6 +33,9 @@ Future<void> setBootCompletedFunction(Function functionToExecute) async {
 
 //this function is called by the android side
 Future<void> _executeOnBootCompleted() async {
+  // Ensure the application is initialized
+  WidgetsFlutterBinding.ensureInitialized();
+
   //this handle should have been set by the application that's using this plugin
   //by calling setBootCompletedFunction
   final userBootCompletedHandle = await _getUserBootCompletedHandle();