iOS实现联系人按照首字母进行排序的实例
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]; nsstring * str= collation.sectiontitles[sectionnumber]; [firstchar addobject:str]; nslog(@"sectionnumbersectionnumber %ld %@",sectionnumber,str); } 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
完成啦!
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