Convert command line arguments in Objective-c to an NSDictionary

gistfile1.m

// Supports --foo=bar and -f bar

static NSDictionary *arguments()
{
    NSArray *arguments = [[NSProcessInfo processInfo] arguments];
    
    if(arguments.count < 2)
        return nil;
    
    NSMutableDictionary *argsDict = [[NSMutableDictionary alloc] init];
    
    NSMutableArray *args = [arguments mutableCopy];
    [args removeObjectAtIndex:0];
    
    NSInteger skip = 0;
    for(NSString *arg in args)
    {
        if(skip > 0 && ((NSInteger)[arguments indexOfObject:arg]) == skip)
        {
            continue;
        }
        else
        {
            if([arg rangeOfString:@"="].location != NSNotFound && [arg rangeOfString:@"--"].location != NSNotFound)
            {
                NSArray *components = [arg componentsSeparatedByString:@"="];
                NSString *key       = [[components objectAtIndex:0] stringByReplacingOccurrencesOfString:@"--" withString:@""];
                NSString *value     = [components objectAtIndex:1];
                
                [argsDict setObject:value forKey:key];
            }
            else if([arg rangeOfString:@"-"].location != NSNotFound)
            {
                NSInteger index = [arguments indexOfObject:arg];
                NSInteger next  = index + 1;
                NSString *key   = [arg stringByReplacingOccurrencesOfString:@"-" withString:@""];
                NSString *value = [arguments objectAtIndex:next];
                
                [argsDict setObject:value forKey:key];
            }
        }
    }
    
    NSLog(@"ARGS: %@", argsDict);
    
    return [argsDict copy];
}

1. Does not consider variant when dashes are in the middle of the word-argument -> accept "h-elp 1"
2. Fails when argument does not have value - access array index without check
3. skip variable is not used