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 |
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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 |