Retrieve file creation or modification date

Swift 3 solution:

func fileModificationDate(url: URL) -> Date? {
    do {
        let attr = try FileManager.default.attributesOfItem(atPath: url.path)
        return attr[FileAttributeKey.modificationDate] as? Date
    } catch {
        return nil
    }
}

Try this. I had same problem and solved with something like next:

NSURL *fileUrl = [NSURL fileURLWithPath:myFilePath];
NSDate *fileDate;
[fileUrl getResourceValue:&fileDate forKey:NSURLContentModificationDateKey error:&error];
if (!error)
{
//here you should be able to read valid date from fileDate variable
}

hope it helped ;)

Here is a Swift like solution of @zvjerka24 answer:

func lastModified(path: String) -> NSDate? {
    let fileUrl = NSURL(fileURLWithPath: path)
    var modified: AnyObject?
    do {
        try fileUrl.getResourceValue(&modified, forKey: NSURLContentModificationDateKey)
        return modified as? NSDate
    } catch let error as NSError {
        print("\(#function) Error: \(error)")
        return nil
    }
}