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  • System requirements

This page describes how to download the Dart SDK.The Dart SDK has the libraries and command-line tools that you need to developDart command-line, server, and non-Flutter web apps.For details, see the Dart SDK overview.

As of Flutter 1.21, the Flutter SDK includes the full Dart SDK.So if you have Flutter installed,you might not need to explicitly download the Dart SDK.Consider downloading the Dart SDK ifany of the following are true:

  • You don’t use Flutter.
  • You use a pre-1.21 version of Flutter.
  • You want to reduce disk space requirements or download time,and your use case doesn’t require Flutter.For example, you might have a continuous integration (CI)setup that requires Dart but not Flutter.

Installing the Dart SDK

As the following instructions show,you can use a package managerto easily install and update a stable channel Dart SDK.Alternatively, you canbuild the SDK from source or install fromany release channel bydownloading the SDK as a zip file.

  • Open the default Xcode workspace in your project by running open ios/Runner.xcworkspace in a terminal window from your Flutter project directory. Select the device you intend to deploy to in the device drop-down menu next to the run button. Select the Runner project in the left navigation panel.
  • Mac下使用Homebrew一键安装Flutter 设计开发 2020-04-11 2,290次浏览 官方教程mac下安装Flutter需要到github下载flutter安装包,但是国内网络环境限制必须通过工具下载,.
  • Jan 11, 2018 Flutter's packaging method is a bit unorthodox in that the cached bits include most of the binary installation. Homebrew, apt-get, virtually all package managers and operating systems will have some combination of permissions, chroot during build, chattr/chflags, etc to try to prevent installed packages from being modified by regular users.

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Dart tools may send usage metrics and crash reports to Google.By downloading the Dart SDK, you agree to theGoogle Terms of Service.Note: The Google Privacy Policydescribes how data is handled in this service.

To control the submission of metrics, use the following options on thedart tool:

  • --enable-analytics: Enables anonymous analytics.
  • --disable-analytics: Disables anonymous analytics.
  • Windows
  • Linux
  • macOS

You can install the Dart SDK using Chocolatey.

Important:These commands require administrator privileges.If you need help on starting an administrator-level command prompt,try a search likecmd admin.

To install the Dart SDK:

Flutter homebrew app

To upgrade the Dart SDK:

If you’re using Debian/Ubuntu on AMD64 (64-bit Intel), you can choose one of thefollowing options, both of which can update the SDK automatically when newversions are released.

Install using apt-get

Perform the following one-time setup:

Then install the Dart SDK:

Install a Debian package

Alternatively, download Dart SDK as Debian packagein the .deb package format.

Modify PATH for access to all Dart binaries

After installing the SDK, add its bin directory to your PATH. For example,use the following command to change PATH in your active terminal session:

To change the PATH for future terminal sessions, use a command like this:

Install Homebrew,and then run the following commands:

Important: Make sure the Homebrew bin directory is in your PATH. Setting up the path correctly makes it easier to use Dart SDK commands such as dart and dart format. For help setting up your path, consult the Homebrew FAQ.

To upgrade when a new release of Dart is available:

To switch between locally installed Dart releases, usebrew switch dart <version>. Example:

Version note: The brew switch command was removed after the 2.6 release of Homebrew. To continue using brew switch, downgrade Homebrew to a 2.6 version:

To see which versions of Dart you’ve installed:

System requirements

The Dart SDK is supported on Windows, Linux, and macOS.

Windows

  • Supported versions: Windows 10.
  • Supported architectures: x64, ia32.

Linux

  • Supported versions: Recent Linux versions, but only Ubuntu 16.04 is tested.
  • Supported architectures: x64, ia32, arm, arm64.
Homebrew

Note: The arm support requires glibc 2.23 or newer due to a dynamic linker bug.

macOS

  • Supported versions: Latest three major versions.As of April 2021, the following versions are supported:
    • macOS 10.14 (Mojave)
    • macOS 10.15 (Catalina)
    • macOS 11 (Big Sur)
  • Supported architectures: x64.Support for arm64 is in progress.

About release channels and version strings

The Dart SDK has three release channels:

  • Stable channel: stable releases, updated roughly every three months;currently [calculating].

    Stable releases are suitable for production use.

  • Beta channel: preview releases, usually updated every month;currently [calculating].

    Beta channel builds are preview builds for the stable channel. We recommendtesting, but not releasing, your apps against beta to preview new features ortest compatibility with future releases.

  • Dev channel: prereleases, usually updated twice a week;currently [calculating].

    Dev channel releases are the most current with latest changes, may be broken,are unsupported, and may contain unvetted breaking changes.

Stable channel releases of the Dart SDK have x.y.z version strings like1.24.3 and 2.1.0. They consist of dot-separated integers, with no hyphens orletters, where x is the major version, y is the minor version, and z isthe patch version.

Beta and dev channel releases of the Dart SDK (non-stable releases) havex.y.z-a.b.<beta dev> versions like 2.8.0-20.11.beta. The part before thehyphen follows the stable version scheme, a and b after the hyphen are theprerelease and prerelease patch versions, and beta or dev is the channel.

You can get stable channel releases usingthe instructions above, or you canget stable, beta, or dev channel releasesusing a package manageror by downloading the SDK as a zip file.

The Flutter code generator for your assets, fonts, colors, … — Get rid of all String-based APIs.

Inspired by SwiftGen.

Motivation #

Using asset path string directly is not safe.

Bad
What would happen if you made a typo?

⭕️ Good
We want to use it safely.

Installation #

Homebrew #

Works with MacOS and Linux.

Pub Global #

Works with MacOS, Linux and Windows.

Flutter Homebrew Software

You might need to set up your path.

As a part of build_runner #

  1. Add build_runner and FlutterGen to your package's pubspec.yaml file:
  1. Install FlutterGen
  1. Use FlutterGen

Usage #

Run fluttergen after the configuration pubspec.yaml.

Configuration file #

FlutterGen generates dart files based on the key flutter and flutter_gen of pubspec.yaml.
Default configuration can be found here.

Available Parsers #

Assets #

Just follow the doc Adding assets and images#Specifying assets to specify assets, then FlutterGen will generate related dart files.
No other specific configuration is required.
Ignore duplicated.

These configurations will generate assets.gen.dart under the lib/gen/ directory by default.

Usage Example

FlutterGen generates Image class if the asset is Flutter supported image format.

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Example results of assets/images/chip.jpg:

  • Assets.images.chip is an implementation of AssetImage class.
  • Assets.images.chip.image(..) returns Image class.
  • Assets.images.chip.path just returns the path string.

If you are using SVG images with flutter_svg you can use the integration feature.

Available Integrations

PackagesFile extensionSettingUsage
flutter_svg.svgflutter_svg: trueAssets.images.icons.paint.svg()
flare_flutter.flrflare_flutter: trueAssets.flare.penguin.flare()

<br/>

In other cases, the asset is generated as String class.

FlutterGen also support generating other style of Assets class:

The root directory will be omitted if it is either assets or asset.

Example of code generated by FlutterGen

Fonts #

Just follow the doc Use a custom font to specify fonts, then FlutterGen will generate related dart files.
No other specific configuration is required.
Ignore duplicated.

These configurations will generate fonts.gen.dart under the lib/gen/ directory by default.

Usage Example

Example of code generated by FlutterGen

Colors #

FlutterGen supports generating colors from XML format files.
Ignore duplicated.

FlutterGen can generate a Color class based on the name attribute and the color hex value.If the element has the attribute type, then a specially color will be generated.

Currently supported special color types:

Noticed that there is no official material color generation algorithm. The implementation is based on the mcg project.

These configurations will generate colors.gen.dart under the lib/gen/ directory by default.

Usage Example

Example of code generated by FlutterGen

Default Configuration #

Homebrew Flutter Sdk Path

The following are the default settings.The options you set in pubspec.yaml will override the corresponding default options.

Credits #

The material color generation implementation is based on mcg and TinyColor. Download visual basic 6now.

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Issues #

Please file FlutterGen specific issues, bugs, or feature requests in our issue tracker.

Plugin issues that are not specific to FlutterGen can be filed in the Flutter issue tracker.

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Contributing #

We are looking for co-developers.

If you wish to contribute a change to any of the existing plugins in this repo,please review our contribution guideand open a pull request.