Save Image to document directory with timestamp ..ios

NSTimeInterval timeStamp = [[NSDate date] timeIntervalSince1970];

     NSNumber *timeStampObj = [NSNumber numberWithDouble: timeStamp];

    

    NSString  *imagePath = [NSHomeDirectory() stringByAppendingPathComponent:[NSString stringWithFormat:@"Documents/capturedImage%@.jpg",timeStampObj]];