刚学习搜索框控件，写了个最简单的dome

#import <UIKit/UIKit.h>

.h

@interface ViewController : UIViewController<UISearchBarDelegate,UISearchDisplayDelegate,UITableViewDataSource,UITableViewDelegate>

@property (nonatomic,strong) UISearchDisplayController *searchDisplayC;//搜索框控件控制器

@property (weak, nonatomic) IBOutlet UISearchBar *searchBar;//搜索条

@property (nonatomic,strong) NSArray *allArray;//全部数据数组

@property (nonatomic,strong) NSMutableArray *filterArray;//搜索出来的数据数组

@end

.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

@synthesize searchBar;

@synthesize searchDisplayC;

@synthesize filterArray;

@synthesize allArray;

- (void)viewDidLoad

{

    [super viewDidLoad];

    allArray = [NSArray arrayWithObjects:@"济南",@"天津",@"潍坊",@"上海",@"北京",@"青岛",@"*",@"钓鱼岛", nil];

    searchDisplayC = [[UISearchDisplayController alloc]initWithSearchBar:searchBar contentsController:self];

    searchDisplayC.delegate = self;

    searchDisplayC.searchResultsDelegate = self;

    searchDisplayC.searchResultsDataSource = self;

	// Do any additional setup after loading the view, typically from a nib.

}

#pragma mark - tabledelegete

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

{

    return filterArray.count;

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{

    static NSString *identifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];

    if (cell == nil) {

        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];

    }

    cell.textLabel.text = [filterArray objectAtIndex:indexPath.row];

    [cell setAccessoryType:UITableViewCellAccessoryDetailDisclosureButton];

    return cell;

}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

{

    //选择后要做的事情

    NSLog(@"已选择");

}

#pragma mark - searchdelegate

- (BOOL) searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString

{

    [filterArray removeAllObjects];

    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF contains[c] %@",searchString];//用于过滤

    filterArray = [NSMutableArray arrayWithArray:[allArray filteredArrayUsingPredicate:predicate]];

    return  YES;

}

- (BOOL) searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchScope:(NSInteger)searchOption

{

    //当scope改变时调用

    return YES;

}

@end