iOS 用UISearchDisplayController实现查找功能

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              WKRootViewController.m

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              表格视图的搜索功能

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              Created by student on 14-10-20.

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              Copyright (c) 2014年 wukong. All rights reserved.

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            #import
            "
            WKRootViewController.h
            "
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            @interface
             WKRootViewController ()

             12
             13 @property (strong, nonatomic) NSMutableArray* dataSource;
 14 15 @property (strong, nonatomic)NSMutableArray* resultArrat;
 16 17 18@end 19 20@implementation WKRootViewController
 21{
 22//用于加载数据源的表视图 23     UITableView *_tableView;
 24 25     UISearchBar *_searchBar;
 26 27     UISearchDisplayController *_searchControl;
 28}
 29 - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
 30{
 31     self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
 32if (self) {
 33// Custom initialization 34    }
 35return self;
 36}
 37 38 - (void)viewDidLoad
 39{
 40    [super viewDidLoad];
 41 42    [self createUI];
 43    [self createDataSource];
 44// Do any additional setup after loading the view. 45}
 46 47 - (void)createDataSource
 48{
 49     _dataSource = [[NSMutableArray alloc] init];
 50     _resultArrat = [[NSMutableArray alloc] init];
 51for (int i = ‘A‘; i <= ‘z‘; i++) {
 52         NSMutableArray *section = [[NSMutableArray alloc] init];
 53for (int j = 1; j <= 10; j++) {
 54             NSString *str = [NSString stringWithFormat:@"%c-%d", i, j];
 55            [section addObject:str];
 56        }
 57        [_dataSource addObject:section];
 58    }
 59}
 60 61#pragma mark- UITableViewDataSource
 62 63 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
 64{
 65//判断当前展示的表格 66if (tableView != _tableView)
 67return1;
 68return _dataSource.count;
 69}
 70 71 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
 72{
 73if (tableView != _tableView) {
 74return _resultArrat.count;
 75    }
 76return [[_dataSource objectAtIndex:section] count];
 77}
 78 79 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
 80{
 81     [tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"cell"];
 82 83     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];
 84if (tableView != _tableView) {
 85         cell.textLabel.text = [_resultArrat objectAtIndex:indexPath.row];
 86     }else{
 87         cell.textLabel.text = [[_dataSource objectAtIndex:indexPath.section] objectAtIndex:indexPath.row];
 88    }
 89return cell;
 90}
 91 92 - (void)didReceiveMemoryWarning
 93{
 94    [super didReceiveMemoryWarning];
 95// Dispose of any resources that can be recreated. 96}
 97 98 99#pragma mark - CreateUI
100 - (void)createUI
101{
102     _tableView = [[UITableView alloc] initWithFrame:CGRectMake(10, 30, 300, 440) style:UITableViewStylePlain];
103     _tableView.delegate = self;
104     _tableView.dataSource = self;
105    [self.view addSubview:_tableView];
106107     _searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, 300, 30)];
108     _searchBar.searchBarStyle = UISearchBarStyleMinimal;
109     _searchBar.delegate = self;
110    [_tableView setTableHeaderView:_searchBar];
111/*112     第一个参数：用于输入搜索内容的UISearchBar对象
113     第二个参数：提供给我的表格视图数据源的控制器对象，这个对象必须是实现了表格的两个协议
114*/115     _searchControl = [[UISearchDisplayController alloc] initWithSearchBar:_searchBar contentsController:self];
116//    _searchControl.searchResultsTableView
117//    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 60, 30)];
118//    label.backgroundColor =[UIColor redColor];
119//    [_searchControl.searchResultsTableView setTableHeaderView:label];
120//设置_searchControl自带的表格视图的委托对象121    [_searchControl setSearchResultsDataSource:self];
122    [_searchControl setSearchResultsDelegate:self];
123}
124125#pragma mark -UISearchBarDelegate
126 - (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
127{
128    [_resultArrat removeAllObjects];
129     NSString *str = [NSString stringWithFormat:@"*%@*", searchText];
130     NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF like %@", str];
131for (NSMutableArray *arr in _dataSource) {
132for (NSString *str in arr) {
133if ([pred evaluateWithObject:str]) {
134                [_resultArrat addObject:str];
135            }
136        }
137    }
138}
139@end