Flutter permission_handler 權限插件的使用

編譯環境：Flutter 版本v1.12.hotfix9 dart SDK：2.7.2

1 pubspec.yaml中引入：

  #  權限
  permission_handler: ^3.2.0

ios中info.plist配置（根據權限情況使用）：

   <!-- Permission options for the `location` group -->
    <key>NSLocationWhenInUseUsageDescription</key>
    <string>Need location when in use</string>
    <key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
    <string>Always and when in use!</string>
    <key>NSLocationUsageDescription</key>
    <string>Older devices need location.</string>
    <key>NSLocationAlwaysUsageDescription</key>
    <string>Can I haz location always?</string>

    <!-- Permission options for the `mediaLibrary` group -->
    <key>NSAppleMusicUsageDescription</key>
    <string>Music!</string>
    <key>kTCCServiceMediaLibrary</key>
    <string>media</string>

    <!-- Permission options for the `calendar` group -->
    <key>NSCalendarsUsageDescription</key>
    <string>Calendars</string>

    <!-- Permission options for the `camera` group -->
    <key>NSCameraUsageDescription</key>
    <string>camera</string>

    <!-- Permission options for the `contacts` group -->
    <key>NSContactsUsageDescription</key>
    <string>contacts</string>

    <!-- Permission options for the `microphone` group -->
    <key>NSMicrophoneUsageDescription</key>
    <string>microphone</string>

    <!-- Permission options for the `speech` group -->
    <key>NSSpeechRecognitionUsageDescription</key>
    <string>speech</string>

    <!-- Permission options for the `sensors` group -->
    <key>NSMotionUsageDescription</key>
    <string>motion</string>

    <!-- Permission options for the `photos` group -->
    <key>NSPhotoLibraryUsageDescription</key>
    <string>photos</string>

    <!-- Permission options for the `reminder` group -->
    <key>NSRemindersUsageDescription</key>
    <string>reminders</string>

2 代碼中具體使用：

  void chosePhoto(int index) async {
    PermissionHandler().requestPermissions(
        [PermissionGroup.photos, PermissionGroup.camera]).then((map) {
      if (map[PermissionGroup.photos] == PermissionStatus.granted ||
          map[PermissionGroup.camera] == PermissionStatus.granted) {
        chosePhotoFromPhone(context, index);
      }
    });
  }

3 總結：
在使用的過程中可能會出現androidX 或者Swift語言的適配，這時候需要根據具體情況進行修改。

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