iOS之UISearchBar实时显示结果

iOS之UISearchBar实时显示结果

 

 

 

    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： 

.h文件 

 

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#import <UIKit/UIKit.h>   @interface SearchViewController : UITableViewController   @end

.m文件 

 

 

 

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// //  SearchViewController.m //  UIViewDemo // //  Created by Carl on 13-6-1. //  Copyright (c) 2013年 Carl. All rights reserved. //   #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