#import "RootController.h"@interface RootController ()<UITableViewDataSource,UITableViewDelegate,UISearchBarDelegate,UISearchResultsUpdating>@property (nonatomic, retain) NSMutableArray *dataList; // 存储数据源
@property (nonatomic, retain) NSMutableArray *searchList; // 存储搜索结果
@property (nonatomic, retain) UISearchController *searchController; // 管理搜索框

@end@implementation RootController- (void)dealloc {self.dataList = nil;self.searchList = nil;self.searchController = nil;[super dealloc];
}// 懒加载
- (NSMutableArray *)dataList {if (!_dataList) {self.dataList = [NSMutableArray arrayWithCapacity:1];for (int i = 0; i < 50; i++) {[self.dataList addObject:[NSString stringWithFormat:@"%d - lanou", i]];}}return [[_dataList retain] autorelease];
}- (NSMutableArray *)searchList {if (!_searchList) {self.searchList = [NSMutableArray arrayWithCapacity:1];}return [[_searchList retain] autorelease];
}- (void)viewDidLoad {[super viewDidLoad];self.searchController = [[UISearchController alloc] initWithSearchResultsController:nil];// 设置负责更新搜索结果控制器内容的对象, 要遵守协议<UISearchResultsUpdating>self.searchController.searchResultsUpdater = self;// 在搜索的时候下面的内容是否变暗self.searchController.dimsBackgroundDuringPresentation = NO;// 在搜索的时候导航栏是否隐藏self.searchController.hidesNavigationBarDuringPresentation = NO;// 设置frameself.searchController.searchBar.frame = CGRectMake(self.searchController.searchBar.frame.origin.x, self.searchController.searchBar.frame.origin.y, self.searchController.searchBar.frame.size.width, 44.0);// 将tableView 的页眉设置为searchBarself.tableView.tableHeaderView = self.searchController.searchBar;//    self.searchController.searchBar.showsScopeBar = YES;
//    NSArray *titles = @[@"1", @"2"];
//    self.searchController.searchBar.scopeButtonTitles = titles;// 设置背景图片self.searchController.searchBar.backgroundImage = [UIImage imageNamed:@"banner"];// 设置背景颜色// 移除searchBarBackground
//    [[self.searchController.searchBar.subviews objectAtIndex:0] removeFromSuperview];
//    self.searchController.searchBar.backgroundColor = [UIColor redColor];// 样式
//    self.searchController.searchBar.barStyle = UIBarStyleDefault;
//    self.searchController.searchBar.barStyle = UIBarStyleBlackOpaque;
    [self.searchController release];
}- (void)didReceiveMemoryWarning {[super didReceiveMemoryWarning];// Dispose of any resources that can be recreated.
}- (BOOL)prefersStatusBarHidden {return YES;
}#pragma mark -- UISearchBarDelegate
// 编辑输入事件
- (BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar {return YES;
}// return NO to not become first responder
- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar {}// called when text starts editing
- (BOOL)searchBarShouldEndEditing:(UISearchBar *)searchBar {return YES;
}// return NO to not resign first responder
- (void)searchBarTextDidEndEditing:(UISearchBar *)searchBar {}// called when text ends editing
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {}// called when text changes (including clear)
- (BOOL)searchBar:(UISearchBar *)searchBar shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text NS_AVAILABLE_IOS(3_0) {return YES;
}// called before text changes// 点击按钮事件
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {}// called when keyboard search button pressed
- (void)searchBarBookmarkButtonClicked:(UISearchBar *)searchBar {}// called when bookmark button pressed
- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar {}// called when cancel button pressed
- (void)searchBarResultsListButtonClicked:(UISearchBar *)searchBar NS_AVAILABLE_IOS(3_2) {}// called when search results button pressed// Scope 点击事件
- (void)searchBar:(UISearchBar *)searchBar selectedScopeButtonIndexDidChange:(NSInteger)selectedScope NS_AVAILABLE_IOS(3_0) {}#pragma mark - Table view data source- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
#warning Potentially incomplete method implementation.// Return the number of sections.return 1;
}- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
#warning Incomplete method implementation.// Return the number of rows in the section.// 如果对搜索框有操作if(self.searchController.active) {return [self.searchList count];}else {// 如果对搜索框没有操作return [self.dataList count];}
}#pragma mark -- UISearchResultsUpdating
- (void)updateSearchResultsForSearchController:(UISearchController *)searchController {// 谓词 NSPredicate -- 它的操作是针对于数组类型的, 就好比数据库中的查询, 数据源就是数组, 好处是: 不需要写很多代码去操作数组, 同时也起到了过滤的作用. 我们可以编写简单的谓词语句, 就可以从数组中过滤出想要的数据.NSString *searchStr = [self.searchController.searchBar text];NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF CONTAINS[c] %@", searchStr];// SELF CONTAINS[c] %@, SELF表示要查询集合对象, CONTAINS[c]表示包含字符串, 其中c 不区分大小写.if (self.searchList != nil) {[self.searchList removeAllObjects];}// 过滤数据self.searchList = [NSMutableArray arrayWithArray:[self.dataList filteredArrayUsingPredicate:predicate]];// 刷新表格
    [self.tableView reloadData];}- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {static NSString *identifer = @"reuse";// 根据重用标志, 去tableView的重用队列中取可用的cellUITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifer];if (!cell) {cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:identifer];}// cell显示的内容if (self.searchController.active) {cell.textLabel.text = self.searchList[indexPath.row];}else {cell.textLabel.text = self.dataList[indexPath.row];}// Configure the cell...return cell;
}@end