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