How to split NSArray into UITableView sections alphabetically

Question

I have having trouble using an indexed table with section headers. Currently I have the indexes down the right hand side and I have the section headers showing correctly, th

Answer 1

Hope that helps you, i don't know if is the best way to do, but it works =)

NSArray *names = @[@"Ana Carolina", @"Ana carolina", @"Ana luiza", @"leonardo", @"fernanda", @"Leonardo Cavalcante"];

NSMutableSet *firstCharacters = [NSMutableSet setWithCapacity:0];
for( NSString*string in names ){
    [firstCharacters addObject:[[string substringToIndex:1] uppercaseString]];
}
NSArray *allLetters = [[firstCharacters allObjects] sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)];
int indexLetter = 0;
NSMutableArray *separeNamesByLetters = [NSMutableArray new];



for (NSString *letter in allLetters) {
    NSMutableDictionary*userBegeinsWith = [NSMutableDictionary new];
    [userBegeinsWith setObject:letter forKey:@"letter"];
    NSMutableArray *groupNameByLetters = [NSMutableArray new];
    NSString *compareLetter1 = [NSString stringWithFormat:@"%@", allLetters[indexLetter]];
    for (NSString*friendName in names) {
        NSString *compareLetter2 = [[friendName substringToIndex:1] uppercaseString];

        if ( [compareLetter1 isEqualToString:compareLetter2] ) {
            [groupNameByLetters addObject:friendName];
        }
    }
    indexLetter++;
    [userBegeinsWith setObject:groupNameByLetters forKey:@"list"];
    [separeNamesByLetters addObject: userBegeinsWith];
}



NSLog(@"%@", separeNamesByLetters);

output:

 (
        {
        letter = A;
        list =         (
            "ana carolina",
            "Ana carolina",
            "Ana luiza"
        );
    },
        {
        letter = F;
        list =         (
            fernanda
        );
    },
        {
        letter = L;
        list =         (
            leonardo,
            "Leonardo Cavalcante"

        )
    }
)