UISearchControllerAndUILocalizedCollection

简介

UISearchController和UILocalizedCollection的使用Demo

##功能列表：

1. 在单页面筛选
2. 多页面筛选
3. 简单字母分组排序
4. 汉语字母分组排序

更新记录

2017.03.07 -- 实现在UILocalizedCollection进行字母区间和姓氏的排序

2017.03.06 -- 实现在UISearchController在单页面进行筛选和多个页面进行筛选的功能

方法简介

初始化UISearchController

_searchController = [[UISearchController alloc] initWithSearchResultsController:nil];
_searchController.searchResultsUpdater = self;
_searchController.searchBar.placeholder = @"";
//设置cancel 为取消
[_searchController.searchBar setValue:@"取消" forKey:@"_cancelButtonText"];
//是否设置半透明覆盖层(在initWithSearchResultsController：nil的情况下最好设置为NO)
_searchController.dimsBackgroundDuringPresentation = NO;
_searchController.searchBar.delegate = self;
[_searchController.searchBar sizeToFit];
self.tableView.tableHeaderView = _searchController.searchBar;

###searchResultsUpdater代理中进行数据筛选

- (void)updateSearchResultsForSearchController:(UISearchController *)searchController {
   NSString * searchString = searchController.searchBar.text;
   NSPredicate * predicate = [NSPredicate  predicateWithFormat:@"SELF CONTAINS %@",searchString];
   self.filteredArray = [[self.dataArray filteredArrayUsingPredicate:predicate] mutableCopy];
   [self.tableView reloadData];
}

初始化UILocalizedIndexedCollation及数据

//配置数据源
NSArray *firstNameArray = @[@"赵",@"钱",@"孙",@"李",@"周",@"吴",@"郑",@"王",@"郭",@"松",@"宋",@"长",@"大",@"小"];
NSMutableArray *tempArray = [NSMutableArray array];
for (int i=0; i<firstNameArray.count; i++) {
    Person *p = [Person new];
    p.name = [NSString stringWithFormat:@"%@",firstNameArray[i]];
    [tempArray addObject:p];
}

//初始化UILocalizedIndexedCollation
localizedCollection = [UILocalizedIndexedCollation currentCollation];
//得出collation索引的数量，这里是27个（26个字母和1个#）
NSInteger sectionTitlesCount = [[localizedCollection sectionTitles] count];
//初始化一个数组newSectionsArray用来存放最终的数据
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];
}
//将每个人按name分到某个section下
for (Person *temp in tempArray) {
    //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 = [localizedCollection sectionForObject:temp collationStringSelector:@selector(name)];
    NSMutableArray *sectionNames = newSectionsArray[sectionNumber];
    [sectionNames addObject:temp];
}

UILocalizedIndexedCollation对数据进行处理

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


//section title
sectionTitleArray = [NSMutableArray array];
NSMutableArray *tempArr = [NSMutableArray array];
[newSectionsArray enumerateObjectsUsingBlock:^(NSArray *array, NSUInteger idx, BOOL * _Nonnull stop) {
   
    if (array.count == 0) {
        [tempArr addObject:array];
    }else{
        [sectionTitleArray addObject:[localizedCollection sectionTitles][idx]];
    }
}];
[newSectionsArray removeObjectsInArray:tempArr];

dataArray = newSectionsArray.copy;

效果图：