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this can be useful for teams that don’t want to require every developer
to have the flutter SDK and cocoapods installed locally.
create frameworks for your compiled dart code,
and all flutter plugins. use CocoaPods for the flutter engine.
with this option, embed the frameworks for your application
and the plugins in xcode, but distribute the
flutter engine as a CocoaPods podspec.
this is similar to the second option, but it provides
an alternative to distributing the large flutter.xcframework.
for examples using an app built with UIKit,
see the iOS directories in the add_to_app code samples.
for an example using SwiftUI, see the iOS directory in news feed app.
<topic_end>
<topic_start>
system requirements
your development environment must meet the
macOS system requirements for flutter
with xcode installed.
flutter supports iOS 12 and later.
additionally, you will need CocoaPods
version 1.10 or later.
<topic_end>
<topic_start>
create a flutter module
to embed flutter into your existing application,
using any of the methods mentioned above,
first create a flutter module.
from the command line, run:
a flutter module project is created at some/path/my_flutter/.
if you are using the first method mentioned above,
the module should be created in the same parent directory
as your existing iOS app.
from the flutter module directory, you can run the same flutter
commands you would in any other flutter project,
like flutter run --debug or flutter build ios.
you can also run the module in
android Studio/IntelliJ or VS code with
the flutter and dart plugins. this project contains a
single-view example version of your module before it’s
embedded in your existing application,
which is useful for incrementally
testing the flutter-only parts of your code.
<topic_end>
<topic_start>
module organization
the my_flutter module directory structure is similar to a
normal flutter application:
add your dart code to the lib/ directory.
add flutter dependencies to my_flutter/pubspec.yaml,
including flutter packages and plugins.
the .ios/ hidden subfolder contains an xcode workspace where
you can run a standalone version of your module.
it is a wrapper project to bootstrap your flutter code,
and contains helper scripts to facilitate building frameworks or
embedding the module into your existing application with CocoaPods.
info note
add custom iOS code to your own existing application’s
project or to a plugin, not to the module’s .ios/
directory. changes made in your module’s .ios/
directory don’t appear in your existing iOS project
using the module, and might be overwritten by flutter.
do not source control the .ios/ directory since it’s autogenerated.
before building the module on a new machine, run flutter pub get
in the my_flutter directory first to regenerate the .ios/
directory before building iOS project using the flutter module.
<topic_end>
<topic_start>
embed the flutter module in your existing application
after you have developed your flutter module,
you can embed it using the methods described at the top of the page.
info note
you can run in debug mode on a simulator or a real device,
and release on a real device. learn more about
flutter’s build modes
to leverage flutter debugging functionality
such as hot reload, see debugging your add-to-app module.
using flutter increases your app size.
<topic_end>
<topic_start>
option a - embed with CocoaPods and the flutter SDK
this method requires every developer working on your
project to have a locally installed version of the flutter SDK.
the flutter module is compiled from source each time the app is built.
simply build your application in xcode to automatically
run the script to embed your dart and plugin code.
this allows rapid iteration with the most up-to-date
version of your flutter module without running additional
commands outside of xcode.
the following example assumes that your existing
application and the flutter module are in sibling
directories. if you have a different directory structure,
you might need to adjust the relative paths.
if your existing application (myapp) doesn’t
already have a podfile, run pod init in the
MyApp directory to create one.
you can find more details on using
CocoaPods in the CocoaPods getting started guide.
add the following lines to your podfile:
<code_start>
flutter_application_path = '../my_flutter'