Get Image Filename using UIImagePickerController - ios

Question

I am trying (AND FAILING) to get the user to upload an image and then pass the image name and actual image to another controller. This worked fine on a simulator and an actual device before ios11. But now, it just works on the simulator and crashes every time on the actual device. I am using TestFlight to test this so I am unable to see the errors on the device. But I saw this and was able to create my method which looks like this:
#objc func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
let chosenImage = info[UIImagePickerControllerOriginalImage] as! UIImage
if #available(iOS 9.0, *) {
let url = info[UIImagePickerControllerReferenceURL] as! URL
//let assets = PHAsset.fetchAssets(withALAssetURLs: [url], options: nil)
//imageName = PHAssetResource.assetResources(for: assets.firstObject!).first!.originalFilename
let result = PHAsset.fetchAssets(withALAssetURLs: [url], options: nil)
imageName = PHAssetResource.assetResources(for: result.firstObject!).first!.originalFilename
// let asset = result.firstObject
// if(asset == nil){
// print("asset is NIL")
// }else {
// print("asset is not NIL")
// }
// print(asset?.value(forKey: "filename"))
// iconImageName = asset?.value(forKey: "filename") as! String
print("FILENAME START")
print(iconImageName)
print("FILENAME END")
} else {
// Fallback on earlier versions
}
self.dismiss(animated: true, completion: { () -> Void in
})
}
the commented out code are other ways I tried to get the file name. Why does this work on a simulator but not on a real device? I have looked online but this seems like the right way except it is not.
PS: Long story but my device does not work when connected to my Mac, which is why I am using TestFlight.

Answer 1

You can get fileName from UIImagePicker easily by this way:
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
if let imageURL = info[UIImagePickerControllerReferenceURL] as? URL {
let result = PHAsset.fetchAssets(withALAssetURLs: [imageURL], options: nil)
let asset = result.firstObject
print(asset?.value(forKey: "filename"))
}
dismiss(animated: true, completion: nil)
}
For further information, you can follow this answer: https://stackoverflow.com/a/40628457/5167909

Answer 2

I believe you can get the image path(and from there the filename easily) from the info dictionary:
info[UIImagePickerControllerImageURL]

Answer 3

Try this:
PHAsset *asset = [self assetFromDictionary:info];
if (asset) {
NSData *fileData = nil;
NSString *fileName = [self filenameForAsset:asset];
}
- (PHAsset *)assetFromDictionary:(NSDictionary *)info {
PHAsset *asset = nil;
if (#available(iOS 11.0, *)) {
NSURL *assetURL = info[UIImagePickerControllerImageURL];
if (assetURL) {
asset = [info valueForKey:UIImagePickerControllerPHAsset];
}
} else {
NSURL *assetURL = info[UIImagePickerControllerReferenceURL];
if (assetURL) {
asset = [[PHAsset fetchAssetsWithALAssetURLs:#[assetURL] options:nil] lastObject];
}
}
return asset;
}
- (NSString *)filenameForAsset:(PHAsset *)asset {
NSString *filename = #"";
if (#available(iOS 9.0, *)) {
filename = [[PHAssetResource assetResourcesForAsset:asset] firstObject].originalFilename;
} else {
filename = [asset valueForKey:#"filename"];
}
return filename;
}