<key>NSPhotoLibraryUsageDescription</key>
<string>This app requires access to the photo library.</string>
<key>NSMicrophoneUsageDescription</key>
<string>This app does not require access to the microphone.</string>
<key>NSCameraUsageDescription</key>
<string>This app requires access to the camera.</string>
<key>NSPhotoLibraryUsageDescription</key>
<string>This app requires access to the photo library.</string>
<key>NSPhotoLibraryAddUsageDescription</key>
<string>This app requires access to the photo library.</string>
"Privacy - Photo Library Additions Usage Description" for iOS 11 and later
"Privacy - Photo Library Usage Description" for iOS 6.0 and later
打开plist文件和此代码
<key>NSPhotoLibraryUsageDescription</key>
<string>This app requires access to the photo library.</string>
<key>NSPhotoLibraryAddUsageDescription</key>
<string>This app requires access to the photo library.</string>
<key>NSPhotoLibraryAddUsageDescription</key>
<string>This app requires read and write permission from the user.</string>
在xamarin.IOS的情况下
if you're adding it from the generic editor then "Privacy - Photo Library Additions Usage Description" will be the given option you will find out instead of "NSPhotoLibraryAddUsageDescription".