Flutter动态照片处理插件live_photos的使用

live_photos

通过视频URL或本地MP4文件生成LivePhotos，并将其保存到相机胶卷。

该插件仅支持iOS。

使用方法

要使用此插件，在你的pubspec.yaml文件中添加live_photos依赖项。

iOS

确保在Info.plist文件中添加以下键：

<key>NSPhotoLibraryAddUsageDescription</key>
<string>为了读取和保存照片及视频。</string>
<key>NSPhotoLibraryUsageDescription</key>
<string>为了读取和保存照片及视频。</string>

示例

以下是一个完整的示例代码，展示了如何使用live_photos插件从URL和本地文件生成LivePhotos。

import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';
import 'package:live_photos/live_photos.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  [@override](/user/override)
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final picker = ImagePicker();
  String videoFile = '';

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('插件示例应用'),
        ),
        body: Center(
            child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: <Widget>[
            GenFromURLButton(),
            const SizedBox(height: 60),
            ElevatedButton(
              child: Text('选择本地视频'),
              onPressed: () async {
                final pickedFile = await picker.getVideo(source: ImageSource.gallery);
                if (pickedFile != null) {
                  setState(() {
                    videoFile = pickedFile.path;
                  });
                }
              },
            ),
            Text('路径: $videoFile'),
            const SizedBox(height: 10),
            GenFromLocalPathButton(videoFile),
          ],
        )),
      ),
    );
  }
}

class GenFromURLButton extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return ElevatedButton(
      child: Text('从URL生成'),
      onPressed: () {
        LivePhotos.generate(
          videoURL: "https://img.gifmagazine.net/gifmagazine/images/3870471/original.mp4",
        ).then(
          (value) {
            if (value) {
              print("成功");
              showDialog(
                context: context,
                builder: (BuildContext ctx) {
                  return AlertDialog(
                    shape: RoundedRectangleBorder(
                      borderRadius: BorderRadius.circular(10.0),
                    ),
                    content: Text('你可以在[设置] > [壁纸]中设置下载的LivePhotos。'),
                    actions: <Widget>[
                      TextButton(
                        child: Text('取消'),
                        onPressed: () => Navigator.pop(ctx),
                      ),
                      TextButton(
                        child: Text('打开'),
                        onPressed: () => LivePhotos.openSettings(),
                      )
                    ],
                  );
                },
              );
            } else {
              print("失败");
            }
          },
        ).catchError(
          (e) => print(e),
        );
      },
    );
  }
}

class GenFromLocalPathButton extends StatelessWidget {
  const GenFromLocalPathButton(this.path);

  final String path;

  [@override](/user/override)
  Widget build(BuildContext context) {
    return ElevatedButton(
      child: Text('从本地路径生成'),
      onPressed: () {
        if (path == '') {
          return;
        }
        LivePhotos.generate(
          localPath: path,
        ).then(
          (value) {
            if (value) {
              print("成功");
              showDialog(
                context: context,
                builder: (BuildContext ctx) {
                  return AlertDialog(
                    shape: RoundedRectangleBorder(
                      borderRadius: BorderRadius.circular(10.0),
                    ),
                    content: Text('你可以在[设置] > [壁纸]中设置下载的LivePhotos。'),
                    actions: <Widget>[
                      TextButton(
                        child: Text('取消'),
                        onPressed: () => Navigator.pop(ctx),
                      ),
                      TextButton(
                        child: Text('打开'),
                        onPressed: () => LivePhotos.openSettings(),
                      )
                    ],
                  );
                },
              );
            } else {
              print("失败");
            }
          },
        ).catchError(
          (e) => print(e),
        );
      },
    );
  }
}