Question

I would like to know how to make a alphabet group sections for the names extracted from sqlite database in iphone (xcode 4.2). I was able to do group section for first name but was unable to do the last name part. Some name have lowercase I want the headers letter to have all capital which includes the lower and uppercase letters of those names. Some names have 3 names and wanted to make sure i get the last name. My code is below and it seems to mix up the alphabet (from A to L to C to D) and also e and E (lower and upper which i dont want to display)

//—create the index—

nameIndex = [[NSMutableArray alloc] init];

for (int i=0; i<[_authorsInfo count]-1; i++){
    //---get the first char of each state---
    authors *tempAuthor = [_authorsInfo objectAtIndex:i];
    char alphabet = [tempAuthor.name characterAtIndex:0];
    NSString *uniChar = [NSString stringWithFormat:@"%C", alphabet];

    //---add each letter to the index array---
    if (![nameIndex containsObject:uniChar])
    {            
        [nameIndex addObject:uniChar];
    }

UPDATE*

self.authorsInfo = [poemDatabase database].authorsInfo;

//---create the index---
nameIndex = [[NSMutableArray alloc] init];

for (int i=0; i<[_authorsInfo count]-1; i++){
    //---get the first char of each state---
    authors *tempAuthor = [_authorsInfo objectAtIndex:i];
    NSArray *nameComponents = [tempAuthor.name componentsSeparatedByString:@" "];
    NSString *lastName = [ nameComponents objectAtIndex: nameComponents.count-1 ];
    char alphabet = [lastName characterAtIndex:0];


    //char alphabet = [tempAuthor.name characterAtIndex:0];
    NSString *uniChar = [NSString stringWithFormat:@"%C", alphabet];

    //---add each letter to the index array---
    if (![nameIndex containsObject:uniChar])
    {            
        [nameIndex addObject:uniChar];
    }        
}

Answer 1

If tempAuthor.name contains whole name with spaces try this:

NSArray *nameComponents = [tempAuthor.name componentsSeparatedByString:@" "];
NSString *lastName = [ nameComponents objectAtIndex: nameComponents.count-1 ]
char alphabet = [lastName characterAtIndex:0];