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FlutterLaunchEngine.h
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1 // Copyright 2013 The Flutter Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifndef FLUTTER_SHELL_PLATFORM_DARWIN_IOS_FRAMEWORK_SOURCE_FLUTTERLAUNCHENGINE_H_
6 #define FLUTTER_SHELL_PLATFORM_DARWIN_IOS_FRAMEWORK_SOURCE_FLUTTERLAUNCHENGINE_H_
7
8 #import "flutter/shell/platform/darwin/ios/framework/Headers/FlutterEngine.h"
9
10 /**
11 * A lazy container for an engine that will only dispense one engine.
12 *
13 * This is used to hold an engine for plugin registration when the
14 * GeneratedPluginRegistrant is called on a FlutterAppDelegate before the first
15 * FlutterViewController is set up. This is the typical flow after the
16 * UISceneDelegate migration.
17 *
18 * The launch engine is intended to work only with first FlutterViewController
19 * instantiated with a NIB since that is the only FlutterEngine that registers
20 * plugins through the FlutterAppDelegate.
21 */
22 @interface FlutterLaunchEngine : NSObject
23
24 /**
25 * Accessor for the launch engine.
26 *
27 * Getting this may allocate an engine.
28 */
29 @property(nonatomic, strong, nullable, readonly) FlutterEngine* engine;
30
31 /**
32 * Take ownership of the launch engine.
33 *
34 * After this is called `self.engine` and `takeEngine` will always return nil.
35 */
36 - (nullable FlutterEngine*)takeEngine;
37
38 @end
39
40 #endif // FLUTTER_SHELL_PLATFORM_DARWIN_IOS_FRAMEWORK_SOURCE_FLUTTERLAUNCHENGINE_H_
FlutterEngine.h
FlutterEngine
Definition: FlutterEngine.h:61
FlutterLaunchEngine
Definition: FlutterLaunchEngine.h:23
-[FlutterLaunchEngine takeEngine]
nullable FlutterEngine * takeEngine()
Definition: FlutterLaunchEngine.m:45
FlutterLaunchEngine::engine
FlutterEngine * engine
Definition: FlutterLaunchEngine.h:29