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dependencies { |
… |
implementation 'com.crashlytics.sdk.android:crashlytics:2.9.9' |
… |
} |
…<code_end> |
The two com.crashlytics.sdk.android:crashlytics dependencies |
might not be the same version. In this example, |
the host app requested v2.10.1 and the Flutter |
module plugin requested v2.9.9.By default, Gradle v5 |
resolves dependency version conflicts |
by using the newest version of the library.This is generally ok as long as there are no API |
or implementation breaking changes between the versions. |
For example, you might use the new Crashlytics library |
in your existing app as follows: |
<code_start>… |
dependencies { |
… |
implementation 'com.google.firebase:firebase-crashlytics:17.0.0-beta03 |
… |
} |
…<code_end> |
This approach won’t work since there are major API differences |
between the Crashlytics’ Gradle library version |
v17.0.0-beta03 and v2.9.9.For Gradle libraries that follow semantic versioning, |
you can generally avoid compilation and runtime errors |
by using the same major semantic version in your |
existing app and Flutter module plugin. |
<topic_end> |
<topic_start>Add Flutter to iOS |
<topic_end> |
<topic_start> |
Topics |
<topic_end> |
<topic_start>Integrate a Flutter module into your iOS project |
Flutter UI components can be incrementally added into your existing iOS |
application as embedded frameworks. There are a few ways to embed Flutter |
in your existing application.Use the CocoaPods dependency manager and installed Flutter SDK. |
In this case, the flutter_module is compiled from |
the source each time the app is built. (Recommended.)Create frameworks for the Flutter engine, your compiled Dart code, |
and all Flutter plugins. Here, you manually embed the frameworks, |
and update your existing application’s build settings in Xcode. |
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 |
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