How to get URL for application’s document directory iPhone

An alternative solution would be to use the -[NSFileManager URLsForDirectory:inDomains:] method and fetching the path from the returned NSArray:

Objective-C:

NSArray *paths = [[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask];
NSURL *documentsURL = [paths lastObject];

Swift:

let paths = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)
let documentsURL = paths[0] as! NSURL

This is supported in iOS 4.0+