#import <UIKit/UIKit.h>

 @interface AppDelegate : UIResponder <UIApplicationDelegate>

 @property (strong, nonatomic) UIWindow *window;

 @end

 #import "AppDelegate.h"

 #import "RootViewController.h"

 @interface AppDelegate ()

 @end

 @implementation AppDelegate

 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

     self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

     // Override point for customization after application launch.

     self.window.backgroundColor = [UIColor whiteColor];

     self.window.rootViewController = [[RootViewController alloc] init];

     [self.window makeKeyAndVisible];

     return YES;

 }

 @end

 #import <UIKit/UIKit.h>

 @interface RootViewController : UIViewController

 @end

 #import "RootViewController.h"

 #import "YXPresident.h"

 #define Width [UIScreen mainScreen].bounds.size.width

 #define Height [UIScreen mainScreen].bounds.size.height

 #define gapHeight 20

 #define Sheight 50

 @interface RootViewController ()<UITableViewDataSource,UITableViewDelegate,UISearchDisplayDelegate,UISearchBarDelegate>

 @property (nonatomic, strong) UISearchBar *searchBar;

 @property (nonatomic, strong) UITableView *mTableView;

 @property (nonatomic, strong) NSArray *presidents;

 @property (nonatomic, strong) NSArray *filteredPresident;

 @end

 @implementation RootViewController

 - (void)loadView

 {

     [super loadView];

     // 初始化searchBar

     self.searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(, gapHeight, Width, Sheight)];

     self.searchBar.delegate = self;

     [self.view addSubview:self.searchBar];

     // 初始化mTableView

     self.mTableView = [[UITableView alloc] initWithFrame:CGRectMake(, gapHeight+Sheight, Width, Height - Sheight - gapHeight) style:UITableViewStylePlain];

     self.mTableView.dataSource = self;

     self.mTableView.delegate = self;

     [self.view addSubview:self.mTableView];

 }

 /**

  * 初始化数组

  */

 - (void)viewDidLoad {

     [super viewDidLoad];

     self.presidents = [[NSArray alloc] initWithObjects:

                        [YXPresident presidentWithFirstName:@"George" lastName:@"Washington"],

                        [YXPresident presidentWithFirstName:@"John" lastName:@"Adams"],

                        [YXPresident presidentWithFirstName:@"Thomas" lastName:@"Jeffeson"],

                        [YXPresident presidentWithFirstName:@"James" lastName:@"Madison"],

                        [YXPresident presidentWithFirstName:@"James" lastName:@"Monroe"],

                        [YXPresident presidentWithFirstName:@"John Quincy" lastName:@"Adams"],

                        [YXPresident presidentWithFirstName:@"Andrew" lastName:@"Jackson"],

                        [YXPresident presidentWithFirstName:@"Martin" lastName:@"van Buren"],

                        [YXPresident presidentWithFirstName:@"William Henry" lastName:@"Harrison"],

                        [YXPresident presidentWithFirstName:@"John" lastName:@"Tyler"],

                        [YXPresident presidentWithFirstName:@"James K" lastName:@"Polk"],

                        [YXPresident presidentWithFirstName:@"Zachary" lastName:@"Taylor"],

                        [YXPresident presidentWithFirstName:@"Millard" lastName:@"Fillmore"],

                        [YXPresident presidentWithFirstName:@"Franklin" lastName:@"Pierce"],

                        [YXPresident presidentWithFirstName:@"James" lastName:@"Buchanan"],

                        [YXPresident presidentWithFirstName:@"Abraham" lastName:@"Lincoln"],

                        [YXPresident presidentWithFirstName:@"Andrew" lastName:@"Johnson"],

                        [YXPresident presidentWithFirstName:@"Ulysses S" lastName:@"Grant"],

                        [YXPresident presidentWithFirstName:@"Rutherford B" lastName:@"Hayes"],

                        [YXPresident presidentWithFirstName:@"James A" lastName:@"Garfield"],

                        [YXPresident presidentWithFirstName:@"Chester A" lastName:@"Arthur"],

                        [YXPresident presidentWithFirstName:@"Grover" lastName:@"Cleveland"],

                        [YXPresident presidentWithFirstName:@"Bejamin" lastName:@"Harrison"],

                        [YXPresident presidentWithFirstName:@"Grover" lastName:@"Cleveland"],

                        [YXPresident presidentWithFirstName:@"William" lastName:@"McKinley"],

                        [YXPresident presidentWithFirstName:@"Theodore" lastName:@"Roosevelt"],

                        [YXPresident presidentWithFirstName:@"William Howard" lastName:@"Taft"],

                        [YXPresident presidentWithFirstName:@"Woodrow" lastName:@"Wilson"],

                        [YXPresident presidentWithFirstName:@"Warren G" lastName:@"Harding"],

                        [YXPresident presidentWithFirstName:@"Calvin" lastName:@"Coolidge"],

                        [YXPresident presidentWithFirstName:@"Herbert" lastName:@"Hoover"],

                        [YXPresident presidentWithFirstName:@"Franklin D" lastName:@"Roosevelt"],

                        [YXPresident presidentWithFirstName:@"Harry S" lastName:@"Truman"],

                        [YXPresident presidentWithFirstName:@"Dwight D" lastName:@"Eisenhower"],

                        [YXPresident presidentWithFirstName:@"John F" lastName:@"Kennedy"],

                        [YXPresident presidentWithFirstName:@"Lyndon B" lastName:@"Johnson"],

                        [YXPresident presidentWithFirstName:@"Richard" lastName:@"Nixon"],

                        [YXPresident presidentWithFirstName:@"Gerald" lastName:@"Ford"],

                        [YXPresident presidentWithFirstName:@"Jimmy" lastName:@"Carter"],

                        [YXPresident presidentWithFirstName:@"Ronald" lastName:@"Reagan"],

                        [YXPresident presidentWithFirstName:@"George H W" lastName:@"Bush"],

                        [YXPresident presidentWithFirstName:@"Bill" lastName:@"Clinton"],

                        [YXPresident presidentWithFirstName:@"George W" lastName:@"Bush"],

                        [YXPresident presidentWithFirstName:@"Barack" lastName:@"Obama"],

                        nil];

 }

 #pragma mark - UITableViewDelegate -

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

 {

     if (self.filteredPresident != nil) {

         return [self.filteredPresident count];

     }

     else{

         return [self.presidents count];

     }

 }

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

 {

     static NSString *Identify = @"cell";

     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:Identify];

     if (cell == nil) {

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

     }

     YXPresident *president = [[YXPresident alloc] init];

     if (self.filteredPresident != nil) {

         president = [self.filteredPresident objectAtIndex:indexPath.row];

     }else{

         president = [self.presidents objectAtIndex:indexPath.row];

     }

     if (president) {

         cell.textLabel.text = [NSString stringWithFormat:@"%@ %@",president.firstName, president.lastName];

     }

     return cell;

 }

 #pragma mark - Content Filtering

 - (void)filterContentForSearchText:(NSString *)searchText

 {

     // 设置搜索条件

     NSPredicate *predicate = [NSPredicate predicateWithFormat:@"firstName CONTAINS[cd] %@ OR lastName CONTAINS[cd] %@",searchText,searchText];

     // 返回搜索结果

     self.filteredPresident = [self.presidents filteredArrayUsingPredicate:predicate];

 }

 #pragma mark - UISearchBarDelegate -

 - (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText

 {

     [self filterContentForSearchText:searchText ];

     if (self.filteredPresident.count ==  && [searchBar.text  isEqual: @""]) {

         self.filteredPresident = nil;

     }

     [self.mTableView reloadData];

 }

 @end

 #import <Foundation/Foundation.h>

 @interface YXPresident : NSObject

 @property (nonatomic, copy) NSString *firstName;

 @property (nonatomic, copy) NSString *lastName;

 + (YXPresident *)presidentWithFirstName:(NSString *)firstName lastName:(NSString *)lastName;

 @end

 #import "YXPresident.h"

 @implementation YXPresident

 @synthesize firstName, lastName;

 + (YXPresident *)presidentWithFirstName:(NSString *)firstName lastName:(NSString *)lastName

 {

     YXPresident *president = [[YXPresident alloc] init];

     president.firstName = firstName;

     president.lastName = lastName;

     return president;

 }

 @end