I have an app that displays GIFs from the internet and I am trying to add the ability to save a GIF to the camera roll. I am using the PHPhotoLibrary and I was trying to save it to the camera roll using the method I've seen in several SO questions such as this one:
func saveToCameraRoll(imageUrl: String) {
PHPhotoLibrary.shared().performChanges({ _ in
let createRequest = PHAssetChangeRequest.creationRequestForAssetFromImage(
atFileURL: URL(string: imageUrl)!)
}) { success, error in
guard success else {
log.debug("failed to save gif \(error)")
return
}
log.debug("successfully saved gif")
}
}
However this gives me failed to save gif Optional(Error Domain=NSCocoaErrorDomain Code=-1 "(null)"), which seems to be because of the .gif file format, but I cannot find another example of how to save to the camera roll without using the deprecated ALAssetsLibrary.writeImageDataToSavedPhotosAlbum.
I tried saving a GIF from Safari, and that worked: the GIF animated when sent to someone else, so I know what I'm trying to do is possible, but can someone point me towards the right part of the PHPhotoLibrary API?
EDIT: Based on this answer to a similar question, I figured out how to do what I wanted with Data and PHAssetCreationRequest as follows:
class func saveToCameraRoll(imageUrl: String) {
ImageService.GetImageData(url: imageUrl) { data in // This helper function just fetches Data from the url using Alamofire
guard let data = data else { return }
PHPhotoLibrary.shared().performChanges({ _ in
PHAssetCreationRequest.forAsset().addResource(with: .photo, data: data, options: nil)
}) { success, error in
guard success else {
log.debug("failed to save gif \(error)")
return
}
log.debug("successfully saved gif")
}
}
}