Flutter, if you’re unfamiliar, is an app development platform that makes it possible to create apps for Android, iOS, macOS, Linux, the Web, and most recently Windows devices — all from the. Flutter build apk or flutter build appbundle to generate the necessary app files to distribute, or flutter run to run the app on a connected device or emulator directly. When you run the app on a phone or emulator with flutter run, you can use the R button on the keyboard to use stateful hot reload.
Google’s cross-platform Flutter SDK has grown significantly since it first launched for Android and iOS apps, gaining support for the web, Mac, and Windows. Today, Google has announced that they’ve partnered with Canonical, the publishers of Ubuntu, to bring Linux desktop app support to Flutter.
Since its outset, Google’s Flutter SDK has aimed to make truly cross-platform apps possible from a single, shared codebase, with desktop platforms like Mac, Windows, and Linux having always been on the roadmap. Flutter began making good on the promise of desktop late last year with the preview release of macOS app support. Not long after, Google opened the door to collaborating with Microsoft to make Flutter apps for Windows 10, Windows 10X, and even Xbox a possibility.
Macro in ms excel 2007. Instead, today, a different collaboration has come to fruition. Google has partnered with Canonical — best known for Ubuntu, the most popular flavor of desktop Linux worldwide — to give Flutter developers the ability to create Linux apps. Flutter’s Linux apps support, available today for alpha testing, is able to craft “snap” packages of their apps, compatible with most Linux distributions, including Ubuntu. From there, developers will be able to publish their Flutter app’s snap onto Canonical’s own online Snap Store, one of the closest things Linux has to Android’s Play Store.
Canonical’s Ken VanDine has shared the company’s enthusiasm both for this collaboration with Google and for the future of Flutter apps on Linux computers, explaining that Canonical wants to be “at the vanguard” of Flutter development.
Canonical is making a significant investment in Flutter by dedicating a team of developers to work alongside Google’s developers to bring the best Flutter experience to the majority of Linux distributions. Canonical will continue to collaborate with Google to further improve Linux support and maintain feature parity with the other supported platforms.
With direct input and assistance from Canonical on the finer details of Ubuntu and Linux in general, Flutter’s Linux apps support could one day become one of the premier ways of creating apps for Linux desktops and laptops.
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The Flutter hybrid development series includes the following:
- Embed native View-Android
- Embed native View-iOS
- Communicate with Native-MethodChannel
- Communicate with Native-BasicMessageChannel
- Communicate with Native-EventChannel
- Add Flutter to Android Activity
- Add Flutter to Android Fragment
- Add Flutter to iOS
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Flutter can be added to the iOS project as a framework, and the introduction of Flutter module into the iOS project requires the installation of Xcode, plus Flutter supports iOS8 and above.
Create Flutter module
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Since Xcode cannot install plug-ins like Android Studio, you can only create a Flutter module by command and open the terminal by entering the following:
After execution, the Flutter module will be created in the ios project/my_Under the flutter directory, the directory structure is as follows:
.ios is a hidden directory that you can run separately from the Flutter module to test its functionality, and iOS code is added to projects or plug-ins of existing applications rather than to the module's.Ios/directory.
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Since the.iOS / directory is automatically generated, do not control its source code.Before building a module on a new machine, start with my_Run the flutter pub get in the flutter directory to regenerate the.iOS/ directory, then use the Flutter module to build the iOS project.
Embedding Flutter modules into existing applications
There are two ways to embed a Flutter module into an existing iOS application:
- Use CocoaPods and the installed Flutter SDK (recommended).
- Create frameworks for the Flutter engine, compiled Art code, and all Flutter plug-ins.Manually embed frameworks and update the build settings of existing applications in Xcode.
The application cannot run on the simulator in Release mode because Flutter does not yet support outputting x86 / x86_ahead of time for Dart code64 binary (AOT) binary file.Run in debug mode on an emulator or real device, and in Release mode on a real device.
The following two ways are to add Release frameworks to an iOS application, so the device cannot select an emulator at compile time, otherwise the compilation fails.
Compilation successful:
Selection emulator compilation failed:
Use CocoaPods and the installed Flutter SDK
This approach requires all relevant developers to install the Flutter environment.
Suppose the existing application and Flutter module are in the same directory.If you use a different directory structure, you may need to adjust the relative path as follows:
Modify the Podfile file in the iOS application, or create it manually if not, as follows:
CocoaPods related please Reference website.
Execute the pod install command:
When in my_Flutter /Pubspec.yamlRun flutter pub get in the Flutter module directory to refreshPodhelper.rbList of plug-ins read by the script.Then run pod install again from the application directory.
Podhelper.rbScript will plug-in Flutter.framework and App.framework Embedded in the project.
Open My with Xcode App.xcworkspaceIf it is already open, you need to close it and reopen it. Compile the project with B and the compilation is successful.
Embedding Flutter Frameworks in Xcode
Generate the necessary Frameworks from commands and embed them into your application by manually editing existing Xcode items.You can use this approach if team members cannot install the Flutter SDK and CocoaPods locally or if you do not want CocoaPods to be used as a dependency manager in existing applications.Every time you make a code change in a Flutter module, you must run flutter build ios.
Run the following command to generate the Frameworks:
After execution, the corresponding compiled products are generated in the corresponding directory:
Frameworks have been generated and there are many ways to link frameworks to iOS applications. Here's one, open Xcode.
take App.framework and Flutter.framework Drag into Build Settings > Build Phases > Link Binary With Libraries:
Add the Frameworks directory to the left of the project at this time:
Add ${PODS_in Build Settings -> Search Paths -> Framework Search PathsROOT}/. /my_Flutter/Flutter/Release
The project was compiled successfully using B.
Create FlutterEngine and FlutterViewController
Embedding a Flutter page into an iOS application requires the creation of a FlutterEngine (Flutter Engine) and a FlutterViewController, which is the host of the Dart VM and Flutter runtimes, and a FlutterViewController attached to the FlutterEngine to communicate and display the Flutter UI.
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Create FlutterEngine:
Add a button to jump to the Flutter page:
The code above uses cached FlutterEngine, which is also a recommended way.
Another way is to use the implicit FlutterEngine, which significantly increases the time it takes to display the Flutter UI. This is not generally recommended. If you rarely display the Flutter screen, there is no good way to determine when to start the Dart VM and when Flutter does not need to stay in state between view controllers, this may be useful.
Specify entry point
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FlutterEngine loads lib/Main.dartThe main() method in a file, or you can specify a method for another file:
Initialize Routing
Starting with Flutter version 1.22, you can specify a route
Communication
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Flutter Ios Linux Command
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