Objective C Get filename of selected photo in photogallery [duplicate] - ios

Question

Im trying to get the image name using PHAssets. But I couldn't find metadata for filename or any method to get the image name. Is there a different way to get the file name?

Answer 1

I know the question has already been answered, but I figured I would provide another option:
extension PHAsset {
var originalFilename: String? {
var fileName: String?
if #available(iOS 9.0, *) {
let resources = PHAssetResource.assetResources(for: self)
if let resource = resources.first {
fileName = resource.originalFilename
}
}
if fileName == nil {
/// This is an undocumented workaround that works as of iOS 9.1
fileName = self.value(forKey: "filename") as? String
}
return fileName
}
}

Answer 2

If you want to get the image name (for example name of last photo in Photos) like IMG_XXX.JPG, you can try this:
PHAsset *asset = nil;
PHFetchOptions *fetchOptions = [[PHFetchOptions alloc] init];
fetchOptions.sortDescriptors = #[[NSSortDescriptor sortDescriptorWithKey:#"creationDate" ascending:YES]];
PHFetchResult *fetchResult = [PHAsset fetchAssetsWithMediaType:PHAssetMediaTypeImage options:fetchOptions];
if (fetchResult != nil && fetchResult.count > 0) {
// get last photo from Photos
asset = [fetchResult lastObject];
}
if (asset) {
// get photo info from this asset
PHImageRequestOptions * imageRequestOptions = [[PHImageRequestOptions alloc] init];
imageRequestOptions.synchronous = YES;
[[PHImageManager defaultManager]
requestImageDataForAsset:asset
options:imageRequestOptions
resultHandler:^(NSData *imageData, NSString *dataUTI,
UIImageOrientation orientation,
NSDictionary *info)
{
NSLog(#"info = %#", info);
if ([info objectForKey:#"PHImageFileURLKey"]) {
// path looks like this -
// file:///var/mobile/Media/DCIM/###APPLE/IMG_####.JPG
NSURL *path = [info objectForKey:#"PHImageFileURLKey"];
}
}];
}
Hope it helps.
In Swift the code will look like this
PHImageManager.defaultManager().requestImageDataForAsset(asset, options: PHImageRequestOptions(), resultHandler:
{
(imagedata, dataUTI, orientation, info) in
if info!.keys.contains(NSString(string: "PHImageFileURLKey"))
{
let path = info![NSString(string: "PHImageFileURLKey")] as! NSURL
}
})
Swift 4:
let fetchResult = PHAsset.fetchAssets(with: .image, options: nil)
if fetchResult.count > 0 {
if let asset = fetchResult.firstObject {
let date = asset.creationDate ?? Date()
print("Creation date: \(date)")
PHImageManager.default().requestImageData(for: asset, options: PHImageRequestOptions(),
resultHandler: { (imagedata, dataUTI, orientation, info) in
if let info = info {
if info.keys.contains(NSString(string: "PHImageFileURLKey")) {
if let path = info[NSString(string: "PHImageFileURLKey")] as? NSURL {
print(path)
}
}
}
})
}
}

Answer 3

One more option is:
[asset valueForKey:#"filename"]
The "legality" of this is up to you to decide.

Answer 4

Easiest solution for iOS 9+ in Swift 4 (based on skims answer):
extension PHAsset {
var originalFilename: String? {
return PHAssetResource.assetResources(for: self).first?.originalFilename
}
}

Answer 5

For Swift
asset?.value(forKey: "filename") as? String
For objective C
[asset valueForKey:#"filename"]

Answer 6

Simplest answer with Swift when you have reference url to an asset:
if let asset = PHAsset.fetchAssetsWithALAssetURLs([referenceUrl], options: nil).firstObject as? PHAsset {
PHImageManager.defaultManager().requestImageDataForAsset(asset, options: nil, resultHandler: { _, _, _, info in
if let fileName = (info?["PHImageFileURLKey"] as? NSURL)?.lastPathComponent {
//do sth with file name
}
})
}

Answer 7

SWIFT4:
first import Photos
if let asset = PHAsset.fetchAssets(withALAssetURLs: [info[UIImagePickerControllerReferenceURL] as! URL],
options: nil).firstObject {
PHImageManager.default().requestImageData(for: asset, options: nil, resultHandler: { _, _, _, info in
if let fileName = (info?["PHImageFileURLKey"] as? NSURL)?.lastPathComponent {
print("///////" + fileName + "////////")
//do sth with file name
}
})
}

Answer 8

What you really looking for is the localIdentifier which is a unique string that persistently identifies the object.
Use this string to find the object by using the:
fetchAssetsWithLocalIdentifiers:options:, fetchAssetCollectionsWithLocalIdentifiers:options:, or fetchCollectionListsWithLocalIdentifiers:options: method.
More information is available here