101在检索框中添加一个书签按钮（扩展知识：在检索框中添加一个范围条）

1 #import <UIKit/UIKit.h>
2 
3 @interface ViewController : UITableViewController<UISearchBarDelegate>
4 @property (strong, nonatomic) UISearchBar *searchBar;
5 @property (strong, nonatomic) NSMutableArray *mArrDataSourceOfTableView;
6 @property (strong, nonatomic) NSMutableArray *mArrDataSourceOfSearchBar;
7 
8 @end

  1 #import "ViewController.h"
  2 
  3 @interface ViewController ()
  4 - (void)layoutUI;
  5 - (void)loadNavigation;
  6 - (void)loadData;
  7 - (void)updateTableView:(NSString *)searchText;
  8 - (void)showAlert:(NSString *)msg;
  9 @end
 10 
 11 @implementation ViewController
 12 #define kCount 64
 13 
 14 - (void)viewDidLoad {
 15     [super viewDidLoad];
 16     
 17     [self layoutUI];
 18 }
 19 
 20 - (void)didReceiveMemoryWarning {
 21     [super didReceiveMemoryWarning];
 22     // Dispose of any resources that can be recreated.
 23 }
 24 
 25 - (void)viewWillAppear:(BOOL)animated {
 26     [super viewWillAppear:animated];
 27     [self.navigationController setNavigationBarHidden:NO animated:animated];
 28     [self.navigationController setToolbarHidden:YES animated:animated];
 29 }
 30 
 31 #pragma mark - Private Methods
 32 - (void)layoutUI {
 33     [self loadNavigation];
 34     
 35     [self loadData];
 36     
 37     _searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, self.tableView.frame.size.width, 50)];
 38     _searchBar.delegate = self;
 39     //_searchBar.prompt = @"数字查询";
 40     _searchBar.placeholder = @"请输入0-63之间的数字";
 41     _searchBar.keyboardType = UIKeyboardTypeNumberPad;
 42     _searchBar.barStyle = UIBarStyleDefault;
 43     _searchBar.tintColor = [UIColor blackColor];
 44     _searchBar.showsBookmarkButton = YES; //是否显示书签按钮；默认值是NO
 45     
 46     _searchBar.scopeButtonTitles = @[@"1", @"2", @"3", @"4", @"5"];
 47     _searchBar.showsScopeBar = YES; //是否显示范围条；默认值是NO
 48     _searchBar.selectedScopeButtonIndex = -1;
 49     
 50     [_searchBar sizeToFit]; //设置宽高大小自适应
 51     self.tableView.tableHeaderView = _searchBar;
 52     
 53 }
 54 
 55 - (void)loadNavigation {
 56     self.navigationItem.title = @"在检索框中添加一个书签按钮";
 57 }
 58 
 59 - (void)loadData {
 60     _mArrDataSourceOfTableView = [[NSMutableArray alloc] initWithCapacity:kCount];
 61     _mArrDataSourceOfSearchBar = [[NSMutableArray alloc] initWithCapacity:kCount];
 62     for (NSInteger i=0; i<kCount; i++) {
 63         [_mArrDataSourceOfTableView addObject:[NSString stringWithFormat:@"%ld", (long)i]];
 64         _mArrDataSourceOfSearchBar[i] = _mArrDataSourceOfTableView[i];
 65     }
 66 }
 67 
 68 - (void)updateTableView:(NSString *)searchText {
 69     [_mArrDataSourceOfSearchBar removeAllObjects];
 70     if (searchText.length == 0) {
 71         _mArrDataSourceOfSearchBar = [[NSMutableArray alloc] initWithArray:_mArrDataSourceOfTableView];
 72     } else {
 73         for (NSString *item in _mArrDataSourceOfTableView) {
 74             if ([item hasPrefix:searchText]) {
 75                 [_mArrDataSourceOfSearchBar addObject:item];
 76             }
 77         }
 78     }
 79     //表格视图tableView更新
 80     [self.tableView reloadData];
 81 }
 82 
 83 - (void)showAlert:(NSString *)msg {
 84     UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示信息"
 85                                                     message:msg
 86                                                    delegate:self
 87                                           cancelButtonTitle:nil
 88                                           otherButtonTitles:@"确定", nil];
 89     [alert show];
 90 }
 91 
 92 #pragma mark - SearchBar
 93 - (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
 94     [self updateTableView:searchText];
 95     
 96     searchBar.selectedScopeButtonIndex = -1;
 97 }
 98 
 99 - (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
100     [self updateTableView:searchBar.text];
101     //隐藏键盘
102     [_searchBar resignFirstResponder];
103     
104     searchBar.selectedScopeButtonIndex = -1;
105 }
106 
107 - (void)searchBarBookmarkButtonClicked:(UISearchBar *)searchBar {
108     [self showAlert:@"点击了书签按钮"];
109 }
110 
111 - (void)searchBar:(UISearchBar *)searchBar selectedScopeButtonIndexDidChange:(NSInteger)selectedScope {
112     //selectedScope = searchBar.selectedScopeButtonIndex
113     NSString *selectedScopeTitle = searchBar.scopeButtonTitles[selectedScope];
114     NSString *msg = [NSString stringWithFormat:@"点击了范围条；选中的项索引位置=%ld，选中的项值=%@",
115                      (long)selectedScope,
116                      selectedScopeTitle];
117     [self showAlert:msg];
118     
119     searchBar.text = selectedScopeTitle;
120     [self updateTableView:searchBar.text];
121 }
122 
123 #pragma mark - TableView
124 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
125     return [_mArrDataSourceOfSearchBar count];
126 }
127 
128 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
129     static NSString *cellIdentifier = @"cellIdentifier";
130     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
131     if (!cell) {
132         cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
133     }
134     cell.textLabel.text = _mArrDataSourceOfSearchBar[indexPath.row];
135     return cell;
136 }
137 
138 @end

1 #import <UIKit/UIKit.h>
2 
3 @interface AppDelegate : UIResponder <UIApplicationDelegate>
4 @property (strong, nonatomic) UIWindow *window;
5 @property (strong, nonatomic) UINavigationController *navigationController;
6 
7 @end

 1 #import "AppDelegate.h"
 2 #import "ViewController.h"
 3 
 4 @interface AppDelegate ()
 5 @end
 6 
 7 @implementation AppDelegate
 8 
 9 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
10     _window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
11     ViewController *viewController = [[ViewController alloc] init];
12     _navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];
13     _window.rootViewController = _navigationController;
14     //[_window addSubview:_navigationController.view]; //当_window.rootViewController关联时，这一句可有可无
15     [_window makeKeyAndVisible];
16     return YES;
17 }
18 
19 - (void)applicationWillResignActive:(UIApplication *)application {
20 }
21 
22 - (void)applicationDidEnterBackground:(UIApplication *)application {
23 }
24 
25 - (void)applicationWillEnterForeground:(UIApplication *)application {
26 }
27 
28 - (void)applicationDidBecomeActive:(UIApplication *)application {
29 }
30 
31 - (void)applicationWillTerminate:(UIApplication *)application {
32 }
33 
34 @end