iOS UISearchBar
UISearchBar 经常是配合UITableView 一起使用的,一般都将UITableView的tableHeaderView属性设置为UISearchBar.使用UISearchBar需要实现UISearchBarDelegate 中的三个方法。
//取消按钮被点击的时候
-(void)searchBarCancelButtonClicked:(UISearchBar *)searchBar;
//搜索按钮被点击的时候
-(void)searchBarSearchButtonClicked:(UISearchBar *)searchBar;
//搜索内容改变的时候,在这个方法里面实现实时显示结果
-(void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText;
主要代码:
#import "SearchViewController.h" @interface SearchViewController ()<UISearchBarDelegate,UISearchDisplayDelegate> @property (nonatomic,strong) NSMutableArray * dataSource; @property (nonatomic,strong) NSMutableArray * dataBase; @property (nonatomic,strong) UISearchDisplayController * mySearchDisplayController; @end @implementation SearchViewController - (id)initWithStyle:(UITableViewStyle)style { self = [super initWithStyle:style]; if (self) { // Custom initialization } return self; } - (void)viewDidLoad { [super viewDidLoad]; _dataSource = [[NSMutableArray alloc] init]; _dataBase = [[NSMutableArray alloc] init]; for(int i = 0; i < 50; i++) { [_dataSource addObject:[NSString stringWithFormat:@"%d",i]]; [_dataBase addObject:[NSString stringWithFormat:@"%d",i]]; } // Uncomment the following line to preserve selection between presentations. // self.clearsSelectionOnViewWillAppear = NO; // Uncomment the following line to display an Edit button in the navigation bar for this view controller. // self.navigationItem.rightBarButtonItem = self.editButtonItem; UISearchBar * searchBar = [[UISearchBar alloc] init]; searchBar.frame = CGRectMake(0, 0, self.tableView.bounds.size.width, 0); searchBar.delegate = self; searchBar.keyboardType = UIKeyboardTypeNumberPad; searchBar.showsCancelButton = YES; searchBar.showsBookmarkButton = YES; searchBar.placeholder = @"请输入"; // searchBar.barStyle = UIBarStyleBlack; searchBar.translucent = YES; searchBar.barStyle = UIBarStyleBlackTranslucent; // searchBar.tintColor = [UIColor redColor]; searchBar.prompt = @"搜索"; [searchBar sizeToFit]; self.tableView.tableHeaderView = searchBar; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } #pragma mark - Table view data source - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { // Return the number of sections. return 1; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { // Return the number of rows in the section. return [_dataSource count]; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; // UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath]; // Configure the cell... UITableViewCell *cell ; if(cell == nil) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; } cell.textLabel.text = [_dataSource objectAtIndex:indexPath.row]; return cell; } /* // Override to support conditional editing of the table view. - (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath { // Return NO if you do not want the specified item to be editable. return YES; } */ /* // Override to support editing the table view. - (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath { if (editingStyle == UITableViewCellEditingStyleDelete) { // Delete the row from the data source [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade]; } else if (editingStyle == UITableViewCellEditingStyleInsert) { // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view } } */ /* // Override to support rearranging the table view. - (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath { } */ /* // Override to support conditional rearranging of the table view. - (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath { // Return NO if you do not want the item to be re-orderable. return YES; } */ #pragma mark - Table view delegate - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { // Navigation logic may go here. Create and push another view controller. /* <#DetailViewController#> *detailViewController = [[<#DetailViewController#> alloc] initWithNibName:@"<#Nib name#>" bundle:nil]; // ... // Pass the selected object to the new view controller. [self.navigationController pushViewController:detailViewController animated:YES]; */ } -(void)searchBarSearchButtonClicked:(UISearchBar *)searchBar { [_dataSource removeAllObjects]; for(NSString * data in _dataBase) { if([data hasPrefix:searchBar.text]) { [_dataSource addObject: data]; } } [self.tableView reloadData]; [searchBar resignFirstResponder]; } -(void)searchBarCancelButtonClicked:(UISearchBar *)searchBar { searchBar.text = @""; [searchBar resignFirstResponder]; } -(void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText { if(0 == searchText.length) { return ; } [_dataSource removeAllObjects]; for(NSString * str in _dataBase) { if([str hasPrefix:searchText]) { [_dataSource addObject:str]; } } [self.tableView reloadData]; } @end