妳既然已經把這個（（聯系人的字典）的數組）都已經拿到了 那麽現在進行下面的步驟：
新建壹個字典，並且給這個字典加入24個鍵值對，鍵值對的Key分別是 @"A",@"B",@"C"……@"Z",每壹個鍵值對的Object都是壹個 NSMutableArray 並且是初始化好了的NSMutableArray
遍歷妳之前得到的這個（聯系人的字典）的數組，依據首字母，分別把聯系人放到字典（1步驟）內的對應的數組上，
現在妳得到了壹個? 具有24個Key的字典 並且這每壹個Key對應的是壹個數組，妳之後在設置妳的UITableView的時候比較方便
具體的方式就這樣，有什麽不明白的妳可以QQ聯系我，這兒我不是來的太頻繁，429801517
下面是我花了壹會寫的個範例代碼，妳看看吧
- (void)viewDidLoad {
[super viewDidLoad];
NSMutableDictionary *dic = [self BuildDictionary];
NSLog(@"%@",dic);
}
-(NSMutableDictionary *)BuildDictionary
{//這個函數返回的就是我們最終需要的了
NSMutableArray * arr = [self BuildPeopleCard];
NSMutableDictionary * dic = [[NSMutableDictionary alloc]init];
char a = 'A';
do{
[dic setObject:[[NSMutableArray alloc] init] forKey:[NSString stringWithFormat:@"%c",a]];
a++;
}while (a <= 'Z');
for (NSString *str in arr)
{
char c = [str characterAtIndex:0];
if (c >= 'a' && c<= 'z')
{//對於妳來說這兒也非必須
c = c - 'a' + 'A';
}
NSString *LastStr = [NSString stringWithFormat:@"%c%@",c,[str substringFromIndex:1]];
[dic[[NSString stringWithFormat:@"%c",c]] addObject:LastStr];
}
return dic;
}
-(NSMutableArray *)BuildPeopleCard
{//這個函數只是用於生成壹個數組而已，對於妳來說這個函數是不必的，因為妳已經從服務器拿到了這個數組了
NSMutableArray *PeopleCard = [[NSMutableArray alloc]init];
NSMutableString *str = [NSMutableString stringWithString:@"Occasionally, Dad would get out his mandolin and play for the family. We three children: Trisha, Monte and I, George Jr., would often sing along. Songs such as the Tennessee Waltz, Harbor Lights and around Christmas time, the well-known rendition of Silver Bells. Silver Bells, Silver Bells, its Christmas time in the city would ring throughout the house. One of Dad's favorite hymns was The Old Rugged Cross. We learned the words to the hymn when we were very young, and would sing it with Dad when he would play and sing. Another song that was often shared in our house was a song that accompanied the Walt Disney series: Davey Crockett. Dad only had to hear the song twice before he learned it well enough to play it. Davey, Davey Crockett, King of the Wild Frontier was a favorite song for the family. He knew we enjoyed the song and the program and would often get out the mandolin after the program was over. I could never get over how he could play the songs so well after only hearing them a few times. I loved to sing, but I never learned how to play the mandolin. This is something I regret to this day. "];
while (str.length > 1)
{
[PeopleCard addObject:[str substringToIndex:[str rangeOfString:@" "].location]];
[str deleteCharactersInRange:NSMakeRange(0, [str rangeOfString:@" "].location + 1)];
}
return PeopleCard;
}