Flutter安全作用域资源访问插件accessing_security_scoped_resource的使用

Flutter安全作用域资源访问插件accessing_security_scoped_resource的使用

调用iOS / macOS的startAccessingSecurityScopedResource和stopAccessingSecurityScopedResource在Flutter中。

使用方法

final _plugin = AccessingSecurityScopedResource();

final folderPath = /* 获取文件夹路径 */;

// 获取访问权限。
final hasAccess = await _plugin.startAccessingSecurityScopedResourceWithFilePath(folderPath);

// 释放访问权限。
_plugin.stopAccessingSecurityScopedResourceWithFilePath(folderPath);

URL-based APIs:

• startAccessingSecurityScopedResourceWithURL
• stopAccessingSecurityScopedResourceWithURL

完整示例代码

以下是一个完整的示例代码，展示了如何使用accessing_security_scoped_resource插件来获取和释放文件夹的访问权限。

import 'package:file_picker/file_picker.dart';
import 'package:flutter/material.dart';
import 'dart:async';

import 'package:accessing_security_scoped_resource/accessing_security_scoped_resource.dart';

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

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  [@override](/user/override)
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _output = '';
  String? _dir;
  final _accessingSecurityScopedResourcePlugin =
      AccessingSecurityScopedResource();

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('插件示例应用'),
        ),
        body: Padding(
          padding: const EdgeInsets.all(12),
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              OutlinedButton(
                  onPressed: _selectDir,
                  child: const Text('选择一个目录')),
              if (_dir != null) Text(_dir!),
              _sep(),
              OutlinedButton(
                  onPressed: _dir != null ? _start : null,
                  child: const Text('startAccessingSecurityScopedResource (URL)')),
              _sep(),
              OutlinedButton(
                  onPressed: _dir != null ? _stop : null,
                  child: const Text('stopAccessingSecurityScopedResource (URL)')),
              _sep(),
              OutlinedButton(
                  onPressed: _dir != null ? _startPath : null,
                  child: const Text('startAccessingSecurityScopedResource (FilePath)')),
              _sep(),
              OutlinedButton(
                  onPressed: _dir != null ? _stopPath : null,
                  child: const Text('stopAccessingSecurityScopedResource (FilePath)')),
              _sep(),
              Text(_output)
            ],
          ),
        ),
      ),
    );
  }

  Widget _sep() {
    return const SizedBox(
      height: 10,
    );
  }

  Future<void> _selectDir() async {
    try {
      var dir = await FilePicker.platform.getDirectoryPath();
      if (dir == null) {
        return;
      }
      setState(() {
        _dir = dir;
      });
    } catch (err) {
      setState(() {
        _output = err.toString();
      });
    }
  }

  void _start() async {
    if (_dir == null) {
      return;
    }
    final hasAccess = await _accessingSecurityScopedResourcePlugin
        .startAccessingSecurityScopedResourceWithURL(Uri.directory(_dir!).toString());
    setState(() {
      _output = 'Has access: $hasAccess';
    });
  }

  void _stop() {
    if (_dir == null) {
      return;
    }
    _accessingSecurityScopedResourcePlugin
        .stopAccessingSecurityScopedResourceWithURL(Uri.directory(_dir!).toString());
    setState(() {
      _output = '';
    });
  }

  void _startPath() async {
    if (_dir == null) {
      return;
    }
    final hasAccess = await _accessingSecurityScopedResourcePlugin
        .startAccessingSecurityScopedResourceWithFilePath(_dir!);
    setState(() {
      _output = 'Has access: $hasAccess';
    });
  }

  void _stopPath() {
    if (_dir == null) {
      return;
    }
    _accessingSecurityScopedResourcePlugin
        .stopAccessingSecurityScopedResourceWithFilePath(_dir!);
    setState(() {
      _output = '';
    });
  }
}