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use the following instructions:
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open-source third-party library
to create a flutter plugin that includes both
C/C++/Objective-C and dart code,
use the following instructions:
the native code is then statically linked into
the application binary of any app that uses
this plugin.
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closed-source third-party library
to create a flutter plugin that includes dart
source code, but distribute the C/C++ library
in binary form, use the following instructions:
warning warning
do not upload this plugin
(or any plugin containing binary code) to pub.dev.
instead, this plugin should be downloaded
from a trusted third-party,
as shown in the CocoaPods example.
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stripping iOS symbols
when creating a release archive (ipa),
the symbols are stripped by xcode.
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other resources
to learn more about c interoperability, check out these videos:
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hosting native iOS views in your flutter app with platform views
platform views allow you to embed native views in a flutter app,
so you can apply transforms, clips, and opacity to the native view
from dart.
this allows you, for example, to use the native
google maps from the android and iOS SDKs
directly inside your flutter app.
info note
this page discusses how to host your own native iOS views
within a flutter app.
if you’d like to embed native android views
in your flutter app,
see hosting native android views.
iOS only uses hybrid composition,
which means that the native
UIView is appended to the view hierarchy.
to create a platform view on iOS,
use the following instructions:
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on the dart side
on the dart side, create a widget
and add the build implementation,
as shown in the following steps.
in the dart widget file, make changes similar to those
shown in native_view_example.dart:
add the following imports:
<code_start>
import 'package:flutter/foundation.dart';
import 'package:flutter/services.dart';
<code_end>
implement a build() method:
<code_start>
widget build(BuildContext context) {
// this is used in the platform side to register the view.
const string viewType = '<platform-view-type>';
// pass parameters to the platform side.
final Map<String, dynamic> creationParams = <string, dynamic>{};
return UiKitView(
viewType: viewType,
layoutDirection: TextDirection.ltr,
creationParams: creationParams,
creationParamsCodec: const StandardMessageCodec(),
);
}
<code_end>
for more information, see the API docs for:
UIKitView.
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on the platform side
on the platform side, use either swift or Objective-C:
implement the factory and the platform view.
the FLNativeViewFactory creates the platform view,
and the platform view provides a reference to the UIView.
for example, FLNativeView.swift:
finally, register the platform view.
this can be done in an app or a plugin.
for app registration,
modify the app’s AppDelegate.swift:
for plugin registration,
modify the plugin’s main file
(for example, FLPlugin.swift):
in Objective-C, add the headers for the factory and the platform view.
for example, as shown in FLNativeView.h:
implement the factory and the platform view.
the FLNativeViewFactory creates the platform view,