iOS实现联系人按照首字母进行排序

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联系人功能的需求一般都会有按照首字母排序,并且会要求同一个姓的就要连续起来中间不能穿插别的姓,百度了一下看到UILocalizedIndexedCollation给我们提供了很方便的排序方法,它不需要将中文转为拼音,但是有一个缺点就是如果姓氏存在多音字就无法区分(例如:姓增,它会被分配到C (ceng)组)
下面贴代码:
1,建一个类进行管理LinkManSort
.m文件
NSString *const CYPinyinGroupResultArray = @”CYPinyinGroupResultArray”;

NSString *const CYPinyinGroupCharArray = @”CYPinyinGroupCharArray”;

@implementation LinkManSort

// 按首字母分组排序数组
+(NSDictionary )sortObjectsAccordingToInitialWith:(NSArray )willSortArr SortKey:(NSString *)sortkey {

// 初始化UILocalizedIndexedCollation
UILocalizedIndexedCollation *collation = [UILocalizedIndexedCollation currentCollation];

//得出collation索引的数量,这里是27个(26个字母和1个#)
NSInteger sectionTitlesCount = [[collation sectionTitles] count];
//初始化一个数组newSectionsArray用来存放最终的数据,我们最终要得到的数据模型应该形如@[@[以A开头的数据数组], @[以B开头的数据数组], @[以C开头的数据数组], ... @[以#(其它)开头的数据数组]]
NSMutableArray *newSectionsArray = [[NSMutableArray alloc] initWithCapacity:sectionTitlesCount];

//初始化27个空数组加入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];

//将每个名字分到某个section下
for (id Model in willSortArr) {
    //获取name属性的值所在的位置,比如"林丹",首字母是L,在A~Z中排第11(第一位是0),sectionNumber就为11
    NSInteger sectionNumber = [collation sectionForObject:Model collationStringSelector:NSSelectorFromString(sortkey)];

    //把name为“林丹”的p加入newSectionsArray中的第11个数组中去
    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数据
NSArray *firstCharResult = [self SortFirstChar:firstChar];


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

//对每个section中的数组按照name属性排序
for (NSInteger index = 0; index < sectionTitlesCount; index++) {
    NSMutableArray *personArrayForSection = newSectionsArray[index];
    NSArray *sortedPersonArrayForSection = [collation sortedArrayFromArray:personArrayForSection collationStringSelector:@selector(name)];
    newSectionsArray[index] = sortedPersonArrayForSection;
}

//删除空的数组
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{

//数组去重复

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;

}

.h文件
先引入框架UIKit/UIKit.h
/**
* 获取model数组
*/
UIKIT_EXTERN NSString *const CYPinyinGroupResultArray;

/**
* 获取所包函字母的数组
*/
UIKIT_EXTERN NSString *const CYPinyinGroupCharArray;
@interface LinkManSort : NSObject
+(NSDictionary )sortObjectsAccordingToInitialWith:(NSArray )willSortArr SortKey:(NSString *)sortkey ;

在VC里面调用
NSArray *arr = @[@{@”name”:@”李立”},@{@”name”:@” 李安”},@{@”name”:@”刘星”},@{@”name”:@”刘小米”},@{@”name”:@”苏音”},@{@”name”:@”韦佳佳”},@{@”name”:@”李华”},@{@”name”:@”杨波”},@{@”name”:@”陈恒”},@{@”name”:@”黄呀呀”},@{@”name”:@”邱珀”},@{@”name”:@”李克”},@{@”name”:@”123456”},@{@”name”:@”韦立林”},@{@”name”:@”陈瑶”}];

NSMutableArray *marr = [NSMutableArray arrayWithCapacity:10];
for (NSDictionary *dict in arr) {

    PersonModel *model =[[PersonModel alloc]init];// dict[@"name"];
    model.name =dict[@"name"];

    [marr addObject:model];


}

NSDictionary *dcit= [LinkManSort sortObjectsAccordingToInitialWith:marr SortKey:@”name”];

NSArray *resultarr1 = dcit[CYPinyinGroupResultArray];//排好顺序的PersonModel数组
NSArray *resultarr2 = dcit[CYPinyinGroupCharArray];//排好顺序的首字母数组

完成

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转载自blog.csdn.net/youyou_56/article/details/78833233