ios getPicture() doesn't store image permanently, only saves to temp directory

Camera options:

• destinationType: Camera.DestinationType.FILE_URI,
• saveToPhotoAlbum: true,
• sourceType: Camera.PictureSourceType.CAMERA,

Situation: getPicture() on iOS saves a newly taken image into the cordova.file.tempDirectory by default

Problem: After closing & re-opening the app, the taken pictures are not available any more in the app - this functionality is only on iOS, all other platforms directly persist

This requires for every camera usage a workaround on ios - Move the file to permanent storage after taking an image:
http://www.joshmorony.com/store-camera-photos-permanently-using-phonegap-ionic-ngcordova/

-> directly save the images in permanent storage on iOS

Further mentions:
http://stackoverflow.com/questions/33249522/angular-and-ionic-camera-function-wont-save-photo
http://stackoverflow.com/questions/27910783/cordova-move-file-using-the-file-url