官方说明:

https://github.com/flutter/plugins/tree/master/packages/image_picker/image_picker
Add the following keys to your Info.plist file, located in <project root>/ios/Runner/Info.plist:

NSPhotoLibraryUsageDescription - describe why your app needs permission for the photo library. This is called Privacy - Photo Library Usage Description in the visual editor.
NSCameraUsageDescription - describe why your app needs access to the camera. This is called Privacy - Camera Usage Description in the visual editor.
NSMicrophoneUsageDescription - describe why your app needs access to the microphone, if you intend to record videos. This is called Privacy - Microphone Usage Description in the visual editor.

i在info.plist文件中添加权限

<key>NSPhotoLibraryUsageDescription</key>
<string>App需要您的同意,才能访问相册</string>

<key>NSPhotoLibraryAddUsageDescription</key>
<string>App需要您的同意,才能访问相册</string>

<key>NSCameraUsageDescription</key>
<string>App需要您的同意,才能访问相机</string>

我这里只需要这些权限, 全部权限在下面:

代码:

var image = await ImagePicker.pickImage(source: ImageSource.camera);
//or
ImagePicker.pickImage(source: ImageSource.camera).then((res){
  image = res;
})

全部iOS权限(和插件无关)

<key>NSPhotoLibraryUsageDescription</key>
<string>App需要您的同意,才能访问相册</string>

<key>NSPhotoLibraryAddUsageDescription</key>
<string>App需要您的同意,才能访问相册</string>

<key>NSCameraUsageDescription</key>
<string>App需要您的同意,才能访问相机</string>

<key>NSMicrophoneUsageDescription</key>
<string>App需要您的同意,才能访问麦克风</string>

<key>NSLocationUsageDescription</key>
<string>App需要您的同意,才能访问位置</string>

<key>NSLocationWhenInUseUsageDescription</key>
<string>App需要您的同意,才能在使用期间访问位置</string>

<key>NSLocationAlwaysUsageDescription</key>
<string>App需要您的同意,才能始终访问位置</string>

<key>NSLocationAlwaysAndWhenInUseUsageDeion</key>
<string>App需要您的同意,才能始终访问位置</string>

<key>NSCalendarsUsageDescription</key>
<string>App需要您的同意,才能访问日历</string>

<key>NSRemindersUsageDescription</key>
<string>App需要您的同意,才能访问提醒事项</string>

<key>NSMotionUsageDescription</key> <string>App需要您的同意,才能访问运动与健身</string>

<key>NSHealthUpdateUsageDescription</key>
<string>App需要您的同意,才能访问健康更新 </string>

<key>NSHealthShareUsageDescription</key>
<string>App需要您的同意,才能访问健康分享</string>

<key>NSBluetoothPeripheralUsageDescription</key>
<string>App需要您的同意,才能访问蓝牙</string>

<key>NSAppleMusicUsageDescription</key>
<string>App需要您的同意,才能访问媒体资料库</string>