扩展了一下 搜索框，能够实现拼音和首字母模糊搜索
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#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;
}