IOS UI-UISearchController

ViewController.m

//
//  ViewController.m
//  IOS_0224_查找联系人
//
//  Created by ma c on 16/2/24.
//  Copyright © 2016年 博文科技. All rights reserved.
//

#import "ViewController.h"
#import "SearchResultsVC.h"

@interface ViewController ()<UITableViewDataSource>

@property (nonatomic, strong) UITableView *tableView;
@property (nonatomic, strong) NSArray *keys;
@property (nonatomic, strong) NSDictionary *dict;

@property (nonatomic, strong) UISearchController *searchCtr;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self createUI];
    
}

- (NSArray *)keys
{
    if (_keys == nil) {
        NSString *path = [[NSBundle mainBundle] pathForResource:@"sortednames" ofType:@"plist"];
        self.dict = [NSDictionary dictionaryWithContentsOfFile:path];
        _keys = [[self.dict allKeys] sortedArrayUsingSelector:@selector(compare:)];
    }
    return _keys;
}

- (NSDictionary *)dict
{
    if (_dict == nil) {
        NSString *path = [[NSBundle mainBundle] pathForResource:@"sortednames" ofType:@"plist"];
        self.dict = [NSDictionary dictionaryWithContentsOfFile:path];
    }
    return _dict;
}

- (void)createUI
{
    [self setupTableView];
    [self setupSearchVC];
}

- (void)setupTableView
{
    self.tableView = [[UITableView alloc] initWithFrame:self.view.frame style:UITableViewStyleGrouped];
    self.tableView.backgroundColor = [UIColor groupTableViewBackgroundColor];
    self.tableView.dataSource = self;
    [self.view addSubview:self.tableView];
}

- (void)setupSearchVC
{
    SearchResultsVC *resultVC = [[SearchResultsVC alloc] initWithDict:self.dict keys:self.keys];
    self.searchCtr = [[UISearchController alloc] initWithSearchResultsController:resultVC];
    
    self.searchCtr.searchResultsUpdater = resultVC;

    self.searchCtr.searchBar.placeholder = @"请输入搜索内容";
    [self.searchCtr.searchBar sizeToFit];
    self.tableView.tableHeaderView = self.searchCtr.searchBar;
}

#pragma mark - UITableViewDataSource

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return self.keys.count;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    NSString *key = self.keys[section];
    NSArray *value = self.dict[key];
    
    return [value count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *identifier = @"cellIdentifier";
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
    
    if (!cell) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:identifier];
    }
    NSString *key = self.keys[indexPath.section];
    NSArray *value = self.dict[key];

    cell.textLabel.text = value[indexPath.row];
    return cell;
}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
    return self.keys[section];
}
- (NSArray<NSString *> *)sectionIndexTitlesForTableView:(UITableView *)tableView
{
    return self.keys;
}

@end

SearchResultsVC.m

//
//  SearchResultsVC.m
//  IOS_0224_查找联系人
//
//  Created by ma c on 16/2/24.
//  Copyright © 2016年 博文科技. All rights reserved.
//

#import "SearchResultsVC.h"

@interface SearchResultsVC ()

@property (strong, nonatomic) NSDictionary *dict;
@property (strong, nonatomic) NSArray *keys;
@property (strong, nonatomic) NSMutableArray *searchList;

@end

@implementation SearchResultsVC

- (instancetype)initWithDict:(NSDictionary *)dict keys:(NSArray *)keys {
    if (self = [super initWithStyle:UITableViewStylePlain]) {
        self.dict = dict;
        self.keys = keys;
        self.searchList = [[NSMutableArray alloc] init];
    }
    return self;
}

- (void)viewDidLoad {
    [super viewDidLoad];
}

- (void)updateSearchResultsForSearchController:(UISearchController *)searchController
{
    NSString *searchString = [searchController.searchBar text];
    NSLog(@"searchString:%@",searchString);
    [self.searchList removeAllObjects];
    
    if (searchString.length > 0) {

//        NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF CONTAINS[c] %@",searchString];
        NSPredicate *predicate =
        [NSPredicate predicateWithBlock:^BOOL(id  _Nonnull evaluatedObject, NSDictionary<NSString *,id> * _Nullable bindings) {
            
            NSRange range = [evaluatedObject rangeOfString:searchString
                                        options:NSCaseInsensitiveSearch];
            
            return range.location != NSNotFound;
        }];

        for (NSString *key in self.keys) {
            NSArray *matches = [self.dict[key]
                                filteredArrayUsingPredicate: predicate];
            [self.searchList addObjectsFromArray:matches];
        }
        [self.tableView reloadData];
    }
}

#pragma mark - UITableViewDataSource

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return [self.searchList count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    
    static NSString *identifier = @"cellIdentifier";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
    
    if (!cell) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:identifier];
    }
    cell.textLabel.text = self.searchList[indexPath.row];
    return cell;
}
@end