UITableView + UISearchBar 实现搜索功能

 #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