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Cocoa Touch, substrings

  • 06-05-2008 9:01am
    #1
    crazy_spider
    Registered Users, Registered Users 2 Posts: 72 ✭✭


    Hi all..
    I'm a beginner to cocoa touch and i was wondering if anyone could help me out.
    Does anyone know how to split a string in half in cocoa touch?

    what im looking to do is, say if i have a string with value 'abcdefghijkl'
    i want to be able to split it up into 2 strings to that i will have
    string1 = abcdef and string2 = ghijkl

    Hope this makes sence and any help would be great.


    cheers...


Comments

  • #2
    Eoin
    Registered Users, Registered Users 2 Posts: 21,263 ✭✭✭✭Eoin


    crazy_spider wrote: »
    Hi all..
    I'm a beginner to cocoa touch and i was wondering if anyone could help me out.
    Does anyone know how to split a string in half in cocoa touch?

    what im looking to do is, say if i have a string with value 'abcdefghijkl'
    i want to be able to split it up into 2 strings to that i will have
    string1 = abcdef and string2 = ghijkl

    Hope this makes sence and any help would be great.


    cheers...

    I don't know what cocoa touch is, but I presume it has standard text functions?

    A substring function should take the start position and the length of the string as parameters.

    So, first you need to get the length of the first string. You'll have to decide how you want to handle if it's an uneven length. Dividing this figure by two, will obviously give you the point where you want to split the strings.

    The first half of the string will start at 1 or 0 (depending on the programming language) and will end at the halfway point that you've just gotten above. You may also have to add or subtract 1 from the halfway point, as this is all off the top of my head.

    To use pseudo code:
    
string1 = "abcdefghijkl";
stringLength = string1.Length;

firstHalf = string1.substr(0, stringLength / 2);

    This will give you enough to work out the second half of the string.


  • #3
    Adam
    Closed Accounts Posts: 8,866 ✭✭✭Adam


    http://developer.apple.com/cgi-bin/search.pl?&q=substrings&site=default_collection


  • #4
    fasty
    Registered Users, Registered Users 2 Posts: 981 ✭✭✭fasty


    eoin_s wrote: »
    I don't know what cocoa touch is, but I presume it has standard text functions?

    I'm assuming he's talking about the api for iPhones which is basically Cocoa.

    The op will need to look at substring/splitting functions for NSString I'd imagine...

    http://developer.apple.com/documentation/Cocoa/Reference/Foundation/Classes/NSString_Class/Reference/NSString.html


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