CODEWITHSUNDEEP
nsstringnsarraysubstring
iNico3D
iNico3D

Reputation: 121

Xcode how to split substring in two substrings

I have a NSString. This NSString is split in different parts with ";".

I split this NSString in 2 substrings (with [componentsSeparatedByString:@";"])

Now, I have a substring, with [componentsSeparatedByString:@";"], in a NSArray. In this substring I have (sometimes but not always !) a ",".

When I have a "," I want to spilt my substring in two "sub-substrings" and use this two sub-subtrings...

How can I do that ?

Thanks for your answers.

EDIT :

Hi @Alladinian, thanks for ur answer. That's a loop I need, I think. I want to add new contact to iPhone address book (First name and Last name) with QRCode.

My NSString looks like :

NSString *_name = [NSString stringWithFormat:@"%@", code.contact];

My substring looks like:

NSArray *subStrings = [code.contact componentsSeparatedByString:@";"];

In my NSString, I have (perhaps but not always) a "," I need two different outputs : one for first name and one for last name.

I know how to add first name and last name separated by "," but I don't know what to do if I have only a first name. Have only a first name crash my app...

For now, to skirt problem, I send Fist name and Last name in Fist name field... But it's not perfect for my sake.

Upvotes: 0

Views: 336

Answers (1)

nielsbot
nielsbot

Reputation: 16032

Ok, here's some code you can use. You can't just use componentsSeparatedByString for the name because there are 4 cases:

  • no comma: assume just first name "first"
  • comma, but no last name ", first"
  • comma, but no first name "last, "
  • comma, both: "last, first"

code:

NSString * mecardString = ...your string...

if ( [ mecardString hasPrefix:@"MECARD:" ] ) // is it really a card string? (starts with 'MECARD:')
{
    mecardString = [ mecardString substringFromIndex:[ @"MECARD:" length ] ] ;  // remove MECARD: from start

    NSString * firstName = nil ;
    NSString * lastName = nil ;

    NSArray * components = [ mecardString componentsSeparatedByString:@";" ] ;
    for( NSString * component in components ) // process all parts of MECARD string
    {
        NSString * lcString = [ component lowercaseString ] ;
        if ( [ lcString hasPrefix:@"n:" ] )
        {
            // handle name ("N:")
            NSRange commaRange = [ lcString rangeOfString:@"," ] ;
            if ( commaRange.location == NSNotFound )
            {
                firstName = lcString ;
            }
            else
            {
                firstName = [ lcString substringFromIndex:NSMaxRange( commaRange  ) ] ;
                lastName = [ lcString substringToIndex:commaRange.location ] ;
            }

            NSCharacterSet * whitespaceCharSet = [ NSCharacterSet whitespaceAndNewlineCharacterSet ] ;
            firstName = [ firstName stringByTrimmingCharactersInSet:whitespaceCharSet ] ;
            lastName = [ firstName stringByTrimmingCharactersInSet:whitespaceCharSet ] ;
        }
        else if  ( lcString hasPrefix:@"sound:" )
        {
            // handle name ("SOUND:")
        }
            // ... write code handle other parts of MECARD... (NICKNAME, BDAY, URL, etc)
        else
        {
            // handle unknown case here
        }
    }

    // you have names here
}

Upvotes: 1

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