Finding file's size
Try this;
NSDictionary *fileAttributes = [[NSFileManager defaultManager] attributesOfItemAtPath:URL error:&attributesError];NSNumber *fileSizeNumber = [fileAttributes objectForKey:NSFileSize];long long fileSize = [fileSizeNumber longLongValue];Note that the fileSize won't necessarily fit in an integer (especially a signed one) although you could certainly drop to a long for iOS as you'll never exceed that in reality. The example uses long long as in my code I have to be compatible with systems with much larger storage available.
One liner in Swift:
let fileSize = try! NSFileManager.defaultManager().attributesOfItemAtPath(fileURL.path!)[NSFileSize]!.longLongValue
If you have a URL (NSURL, not a String), you can get the file size without a FileManager:
let attributes = try? myURL.resourceValues(forKeys: Set([.fileSizeKey])) let fileSize = attributes?.fileSize // Int?