ios 에서 react-native-image-picker 를 사용하려면 설정을 해줘야 한다
ios/[project]/Info.plist
(...)
<key>NSPhotoLibraryUsageDescription</key>
<string>$(PRODUCT_NAME) would like access to your photo gallery</string>
<key>NSCameraUsageDescription</key>
<string>$(PRODUCT_NAME) would like to use your camera</string>
<key>NSPhotoLibraryAddUsageDescription</key>
<string>$(PRODUCT_NAME) would like to save photos to your photo gallery</string>
</dict>
</plist>