根據(jù)數(shù)據(jù)的拼音或者文案的首字母排序

方法如下：

static NSString * const CYPinyinGroupResultArray = @"CYPinyinGroupResultArray";
static NSString * const CYPinyinGroupCharArray = @"CYPinyinGroupCharArray";


// 按首字母分組排序數(shù)組
- (NSDictionary *)sortObjectsAccordingToInitialWith:(NSArray *)willSortArr SortKey:(NSString *)sortkey {
    
    // 初始化UILocalizedIndexedCollation
    UILocalizedIndexedCollation *collation = [UILocalizedIndexedCollation currentCollation];

    // 得出collation索引的數(shù)量剃执，這里是27個(gè)（26個(gè)字母和1個(gè)#）
    NSInteger sectionTitlesCount = [[collation sectionTitles] count];
    
    // 初始化一個(gè)數(shù)組newSectionsArray用來(lái)存放最終的數(shù)據(jù)懈息，我們最終要得到的數(shù)據(jù)模型應(yīng)該形如
    // @[@[以A開(kāi)頭的數(shù)據(jù)數(shù)組], @[以B開(kāi)頭的數(shù)據(jù)數(shù)組], @[以C開(kāi)頭的數(shù)據(jù)數(shù)組], ... @[以#(其它)開(kāi)頭的數(shù)據(jù)數(shù)組]]
    NSMutableArray *newSectionsArray = [[NSMutableArray alloc] initWithCapacity:sectionTitlesCount];

    //初始化27個(gè)空數(shù)組加入newSectionsArray
    for (NSInteger index = 0; index < sectionTitlesCount; index++) {
        NSMutableArray *array = [[NSMutableArray alloc] init];
        [newSectionsArray addObject:array];
    }

    NSLog(@"newSectionsArray %@ %@",newSectionsArray,collation.sectionTitles);

    NSMutableArray *firstChar = [NSMutableArray arrayWithCapacity:10];

    //將每個(gè)名字分到某個(gè)section下
    for (id Model in willSortArr) {
        //獲取name屬性的值所在的位置，比如"林丹"辫继，首字母是L怒见，在A~Z中排第11（第一位是0），sectionNumber就為11
        NSInteger sectionNumber = [collation sectionForObject:Model collationStringSelector:NSSelectorFromString(sortkey)];

        //把name為“林丹”的p加入newSectionsArray中的第11個(gè)數(shù)組中去
        NSMutableArray *sectionNames = newSectionsArray[sectionNumber];
        [sectionNames addObject:Model];

        //拿出每名字的首字母
        NSString * str= collation.sectionTitles[sectionNumber];
        [firstChar addObject:str];
        NSLog(@"sectionNumbersectionNumber %ld %@",sectionNumber,str);
    }

    //返回首字母排好序的數(shù)據(jù)
    NSArray *firstCharResult = [self SortFirstChar:firstChar];


    NSLog(@"firstCharResult== %@",firstCharResult);

    //對(duì)每個(gè)section中的數(shù)組按照name屬性排序
    for (NSInteger index = 0; index < sectionTitlesCount; index++) {
        NSMutableArray *personArrayForSection = newSectionsArray[index];
        NSArray *sortedPersonArrayForSection = [collation sortedArrayFromArray:personArrayForSection collationStringSelector:@selector(name)];
        newSectionsArray[index] = sortedPersonArrayForSection;
    }

    //刪除空的數(shù)組
    NSMutableArray *finalArr = [NSMutableArray new];
    for (NSInteger index = 0; index < sectionTitlesCount; index++) {
        if (((NSMutableArray *)(newSectionsArray[index])).count != 0) {
            [finalArr addObject:newSectionsArray[index]];
        }
    }
    return @{CYPinyinGroupResultArray:finalArr,CYPinyinGroupCharArray:firstCharResult};
}

- (NSArray *)SortFirstChar:(NSArray *)firstChararry
{
    //數(shù)組去重復(fù)
    NSMutableArray *noRepeat = [[NSMutableArray alloc]initWithCapacity:8];
    NSMutableSet *set = [[NSMutableSet alloc]initWithArray:firstChararry];

    [set enumerateObjectsUsingBlock:^(id obj , BOOL *stop){
        [noRepeat addObject:obj];
    }];

    //字母排序
    NSArray *resultkArrSort1 = [noRepeat sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2) {
        return [obj1 compare:obj2 options:NSNumericSearch];
    }];

    //把”#“放在最后一位
    NSMutableArray *resultkArrSort2 = [[NSMutableArray alloc]initWithArray:resultkArrSort1];
    if ([resultkArrSort2 containsObject:@"#"]) {
        [resultkArrSort2 removeObject:@"#"];
        [resultkArrSort2 addObject:@"#"];
    }
    return resultkArrSort2;
}

方法調(diào)用：
因?yàn)?collationStringSelector方法需要 傳入一個(gè) SEL遣耍，所以需要把數(shù)據(jù)轉(zhuǎn)成Model

@interface BSModel : NSObject

@property (nonatomic, copy) NSString *name;

@end

然后調(diào)用方法

NSArray *models = [NSArray yy_modelArrayWithClass:BSModel.class json:[responseObject objectForKey:@"data"]];
NSDictionary *dict = [self sortObjectsAccordingToInitialWith:models SortKey:@"name"];
self.sectionDataSource = [dict objectForKey:CYPinyinGroupCharArray];
self.cellDataSource = [dict objectForKey:CYPinyinGroupResultArray];

數(shù)據(jù)如下

[
    {
      "name" : "順豐速運(yùn)"
    },
    {
      "name" : "百世快遞"
    },
    {
      "name" : "中通快遞"
    },
    {
      "name" : "申通快遞"
    },
    {
      "name" : "圓通速遞"
    },
    {
      "name" : "韻達(dá)速遞"
    },
    {
      "name" : "郵政快遞包裹"
    },
    {
      "name" : "EMS"
    },
    {
      "name" : "天天快遞"
    },
    {
      "name" : "京東快遞"
    },
    {
      "name" : "優(yōu)速快遞"
    },
    {
      "name" : "德邦快遞"
    },
    {
      "name" : "宅急送"
    },
    {
      "name" : "TNT快遞"
    },
    {
      "name" : "UPS"
    },
    {
      "name" : "DHL"
    },
    {
      "name" : "FEDEX聯(lián)邦(國(guó)內(nèi)件)"
    },
    {
      "name" : "FEDEX聯(lián)邦(國(guó)際件)"
    }
  ]