flutter数据共享_使用Flutter共享插件共享内容

喜欢ヅ旅行 2022-11-27 04:29 271阅读 0赞

flutter数据共享

Are you creating a Flutter application that has content users may want to share with their friends or coworkers? Take advantage of the native platform share dialog using the `share` plugin. Let’s see how it’s done.

您是否正在创建一个Flutter应用程序，该应用程序具有用户可能想要与他们的朋友或同事共享的内容？ 利用`share`插件利用本机平台共享对话框。 让我们看看它是如何完成的。

## 创建一个新的Flutter项目 **(**Creating a new Flutter project**)** ##

As always, we’ll start off by setting up a new Flutter project and adding the plugin:

与往常一样，我们将首先建立一个新的Flutter项目并添加插件：

# New Flutter project
    $ flutter create f_share
    
    # Open this up inside of VS Code
    $ cd f_share && code .

## 添加共享插件 **(**Adding the Share plugin**)** ##

Head over to your `pubspec.yaml` and add the following plugin:

转到您的`pubspec.yaml`并添加以下插件：

dependencies:
      flutter:
        sdk: flutter
    
      share: ^0.6.2+3

## 脚手架我们的项目 **(**Scaffolding Our Project**)** ##

We can then go ahead and update our `main.dart` file to contain a `HomePage` found at `f_share/home.dart`:

然后，我们可以继续更新`main.dart`文件，使其包含位于`f_share/home.dart`的`HomePage` ：

import 'package:f_share/home.dart';
    import 'package:flutter/material.dart';
    
    void main() => runApp(MyApp());
    
    class MyApp extends StatelessWidget {
      @override
      Widget build(BuildContext context) {
        return MaterialApp(
          title: 'Flutter Demo',
          theme: ThemeData(
            primarySwatch: Colors.blue,
          ),
          home: HomePage(),
        );
      }
    }

Our `HomePage` will be a simple `StatefulWidget` that contains an `AppBar` and an empty `Container`. As you may be able to tell from the `appBar` title, we’re creating a list of Alligators that we may want to share with our friends!

我们的`HomePage`将是一个简单的`StatefulWidget` ，其中包含一个`AppBar`和一个空`Container` 。 正如您可以从`appBar`标题中看出的`appBar` ，我们正在创建一个鳄鱼清单，我们可能希望与我们的朋友分享！

import 'package:flutter/material.dart';
    
    class HomePage extends StatefulWidget {
      HomePage({Key key}) : super(key: key);
    
      _HomePageState createState() => _HomePageState();
    }
    
    class _HomePageState extends State<HomePage> {
      @override
      Widget build(BuildContext context) {
        return Scaffold(
          appBar: AppBar(
            title: Text("My favourite Alligators"),
          ),
          body: Container()
        );
      }
    }

## 短吻鳄 **(**Alligators**)** ##

Let’s create an Alligator class inside of `alligator_model.dart` which contains a `name` and `description`, we’ll use this to generate our list in a moment:

让我们在`alligator_model.dart`内创建一个包含`name`和`description`的Alligator类，稍后将使用它来生成列表：

import 'package:flutter/foundation.dart';
    
    class Alligator {
      String name;
      String description;
    
      Alligator({@required this.name, @required this.description});
    }

We can then create a `List<Alligator>` inside of `HomePage` and display them on screen:

然后，我们可以在`HomePage`创建`List<Alligator>`并将其显示在屏幕上：

import 'package:f_share/alligator_model.dart';
    import 'package:flutter/material.dart';
    import 'package:share/share.dart';
    
    class HomePage extends StatefulWidget {
      HomePage({Key key}) : super(key: key);
    
      _HomePageState createState() => _HomePageState();
    }
    
    class _HomePageState extends State<HomePage> {
    
      List<Alligator> alligators = [
        Alligator(
            name: "Crunchy", description: "A fierce Alligator with many teeth."),
        Alligator(name: "Munchy", description: "Has a big belly, eats a lot."),
        Alligator(
            name: "Grunchy", description: "Scaly Alligator that looks menacing."),
      ];
    
      @override
      Widget build(BuildContext context) {
        return Scaffold(
          appBar: AppBar(
            title: Text("My favourite Alligators"),
          ),
          body: Column(
              children: alligators
                  .map((Alligator alligator) => Card(
                        child: Column(
                          children: <Widget>[
                            ListTile(
                              title: Text(alligator.name),
                              subtitle: Text(alligator.description),
                            )
                          ],
                        ),
                      ))
                  .toList()),
        );
      }
    }

## 添加共享功能 **(**Adding the Share functionality**)** ##

In order to make it so that whenever the user clicks on a `ListTile`, we’ll hook into the `onTap` functionality, calling a `share` function:

为了做到这一点，以便每当用户单击`ListTile` ，我们都将挂接到`onTap`功能中，调用`share`功能：

@override
    Widget build(BuildContext context) {
      return Scaffold(
        appBar: AppBar(
          title: Text("My favourite Alligators"),
        ),
        body: Column(
            children: alligators
                .map((Alligator alligator) => Card(
                      child: Column(
                        children: <Widget>[
                          ListTile(
                            title: Text(alligator.name),
                            subtitle: Text(alligator.description),
                            onTap: () => share(context, alligator),
                          )
                        ],
                      ),
                    ))
                .toList()),
      );
    }
    
    share(BuildContext context, Alligator alligator) {
      final RenderBox box = context.findRenderObject();
    
      Share.share("${alligator.name} - ${alligator.description}",
          subject: alligator.description,
          sharePositionOrigin: box.localToGlobal(Offset.zero) & box.size);
    }

The main part of this is the `Share` function where we can supply a `text` and optional `subject`, which we’re using to pass this to our messages app in this example:

此部分的主要部分是`Share`函数，在该函数中，我们可以提供`text`和可选`subject` ，在本示例中，我们将其用于将其传递给我们的消息应用程序：

Note that we need to ensure that we pass in the `sharePositionOrigin` for iPad devices by capturing the `context.findRenderObject()`.

请注意，我们需要通过捕获`context.findRenderObject()`来确保为iPad设备传入`sharePositionOrigin` 。

You should now be able to take advantage of the native platform share functionality inside of your Flutter apps!

现在，您应该能够在Flutter应用程序内部利用本机平台共享功能！

> 翻译自: [https://www.digitalocean.com/community/tutorials/flutter-share-plugin][https_www.digitalocean.com_community_tutorials_flutter-share-plugin]

flutter数据共享

[https_www.digitalocean.com_community_tutorials_flutter-share-plugin]: https://www.digitalocean.com/community/tutorials/flutter-share-plugin