扩展了一下 搜索框，能够实现拼音和首字母模糊搜索
基本搜索 [上一篇文章 ]（https://www.cnblogs.com/wjw-blog/p/10724043.html iOS8之后搜索框的常规实例）

#import "NSString+utility.h"@interface WJWPinyinSearchViewController ()<UISearchResultsUpdating,UITableViewDelegate,UITableViewDataSource,UISearchBarDelegate>@property (nonatomic, strong) UITableViewController *searchTableViewController;@property (nonatomic, strong) UISearchController *searchController;@property (nonatomic, strong) NSMutableArray *dataArray;@property (nonatomic, strong) NSMutableArray *searchList;@end@implementation WJWPinyinSearchViewController- (void)viewDidLoad { [super viewDidLoad]; self.view.backgroundColor = [UIColor whiteColor]; [self addChildViewController:self.searchTableViewController]; [self initDataArray]; [self configUI];}- (void)initDataArray{ [self.dataArray addObject:@"世界"]; [self.dataArray addObject:@"核平"]; [self.dataArray addObject:@"平行"]; [self.dataArray addObject:@"宇宙"]; [self.dataArray addObject:@"技术进步"]; [self.dataArray addObject:@"毫无意义"]; [self.dataArray addObject:@"尘归尘，土归土"]; [self.dataArray addObject:@"中"]; [self.dataArray addObject:@"国"]; [self.dataArray addObject:@"红"];}- (void)configUI { [self.view addSubview: self.searchTableViewController.tableView]; self.searchTableViewController.tableView.frame = self.view.frame;}#pragma mark ---UITableViewDataSource---- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return 1;}- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { if (self.searchController.active) { return [self.searchList count]; }else { return self.dataArray.count; }}- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *searchCellId = @"SearchCellID"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:searchCellId]; if (!cell) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:searchCellId]; } if (self.searchController.active) { [cell.textLabel setText:self.searchList[indexPath.row]]; }else { [cell.textLabel setText:self.dataArray[indexPath.row]]; } return cell;}#pragma mark ----UISearchResultsUpdating----- (void)updateSearchResultsForSearchController:(UISearchController *)searchController { NSString *searchString = [self.searchController.searchBar text]; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF CONTAINS[c] %@", searchString]; if (self.searchList != nil) { [self.searchList removeAllObjects]; } //过滤数据 self.searchList = [NSMutableArray arrayWithArray:[_dataArray filteredArrayUsingPredicate:predicate]]; //刷新表格 [self.searchTableViewController.tableView reloadData];}- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText { NSLog(@"输入字符串为：%@ -- %lu", searchText, (unsigned long)searchText.length); //需要事先清空存放搜索结果的数组 [self.searchList removeAllObjects]; //在子线程中做搜索操作 dispatch_queue_t globalQueue = dispatch_get_global_queue(0, 0); dispatch_async(globalQueue, ^{ if (searchText != nil && searchText.length > 0) { for (NSString *tempStr in self.dataArray) { NSString *pinyin = [tempStr transformToPinyin:tempStr]; NSLog(@"字符拼音：%@",pinyin); if ([pinyin rangeOfString:searchText options:NSCaseInsensitiveSearch].length > 0) { [self.searchList addObject:tempStr]; } } }else { self.searchList = [NSMutableArray arrayWithArray:self.dataArray]; } //回到主线程刷新表格 dispatch_async(dispatch_get_main_queue(), ^{ [self.searchTableViewController.tableView reloadData]; }); });}-(UISearchController *)searchController { if (!_searchController) { _searchController = [[UISearchController alloc] initWithSearchResultsController:nil]; _searchController.searchResultsUpdater = self; _searchController.dimsBackgroundDuringPresentation = NO; _searchController.hidesNavigationBarDuringPresentation = YES;//搜索框编辑时隐藏导航栏 _searchController.searchBar.frame = CGRectMake(self.searchController.searchBar.frame.origin.x, _searchController.searchBar.frame.origin.y, _searchController.searchBar.frame.size.width, 44.0); self.searchTableViewController.tableView.tableHeaderView = _searchController.searchBar; _searchController.searchBar.delegate = self; } return _searchController;}- (NSMutableArray *)dataArray { if (!_dataArray) { _dataArray = [NSMutableArray array]; } return _dataArray;}- (UITableViewController *)searchTableViewController { if (!_searchTableViewController) { _searchTableViewController = [[UITableViewController alloc] init]; _searchTableViewController.tableView.delegate = self; _searchTableViewController.tableView.dataSource = self; } return _searchTableViewController;}/* #pragma mark - Navigation // In a storyboard-based application, you will often want to do a little preparation before navigation - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { // Get the new view controller using [segue destinationViewController]. // Pass the selected object to the new view controller. } */@end

"NSString+utility.h" 中有一个方法用来将字符转为拼音字符串

/** 把汉字字符串转为拼音 @param aString 汉字字符串 @return 拼音字符串 */- (NSString *)transformToPinyin:(NSString *)aString{ //转成了可变字符串 NSMutableString *str = [NSMutableString stringWithString:aString]; CFStringTransform((CFMutableStringRef)str,NULL, kCFStringTransformMandarinLatin,NO); //再转换为不带声调的拼音 CFStringTransform((CFMutableStringRef)str,NULL, kCFStringTransformStripDiacritics,NO); NSArray *pinyinArray = [str componentsSeparatedByString:@" "]; NSMutableString *allString = [NSMutableString new]; int count = 0; for (int i = 0; i < pinyinArray.count; i++) { for(int i = 0; i < pinyinArray.count;i++) { if (i == count) { [allString appendString:@"#"]; //区分第几个字母 } [allString appendFormat:@"%@",pinyinArray[i]]; } [allString appendString:@","]; count ++; } NSMutableString *initialStr = [NSMutableString new]; //拼音首字母 for (NSString *s in pinyinArray) { if (s.length > 0) { [initialStr appendString: [s substringToIndex:1]]; } } [allString appendFormat:@"#%@",initialStr]; [allString appendFormat:@",#%@",aString]; return allString;}