本文写的是简单使用UISearchController从TableView中检索的Demo
在ViewController.m中如下：
首先要添加代理
@interface ViewController ()<UITableViewDelegate,UITableViewDataSource,UISearchControllerDelegate,UISearchResultsUpdating>{
}
然后简单的写一下我们用到的数据
@property (nonatomic, strong) UISearchController *searchController;
@property (nonatomic, strong) UITableView *tableView;
@property (strong,nonatomic) NSMutableArray *dataList;//全部数据的array
@property (strong,nonatomic) NSMutableArray *searchList;//search到的array
@property (nonatomic, copy) NSString *cureHistoryDeleteBtnString; // 删除按钮字样
具体实现方法如下：
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self createTableView];
[self createSearch];
NSArray *arr1 = @[@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9",@"10",@"11",@"12"];
NSArray *arr2 = @[];
_dataList = [NSMutableArray arrayWithArray:arr1];//数据数组
_searchList = [NSMutableArray arrayWithArray:arr2];//search到的数组
}
#pragma mark- TableView
- (void)createTableView{
_tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 20, UI_SCREEN_SIZE.width, UI_SCREEN_SIZE.height)];
_tableView.delegate = self;
_tableView.dataSource = self;
[self.view addSubview:_tableView];
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
return 60;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
return 1;
}
//设置区域的行数
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
if (self.searchController.active) {
// _tableView.hidden = NO;
return [self.searchList count];
}else{
// _tableView.hidden = YES;
return [self.dataList count];
}
}
//返回单元格内容
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *flag=@"cellFlag";
UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:flag];
if (cell==nil) {
cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:flag];
//取消选中状态
// [cell setSelectionStyle:UITableViewCellSelectionStyleNone];
cell.backgroundColor = [UIColor colorWithRed:arc4random()%255/256.0f green:arc4random()%255/256.0f blue:arc4random()%255/256.0f alpha:1];
}
if (self.searchController.active) {
// _tableView.hidden = NO;
[cell.textLabel setText:self.searchList[indexPath.row]];
}
else{
// _tableView.hidden = YES;
[cell.textLabel setText:self.dataList[indexPath.row]];
}
//
return cell;
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
SecondViewController *sec = [[SecondViewController alloc] init];
if (_searchList.count != 0) {
sec.number = _searchList[indexPath.row];
}else{
sec.number = _dataList[indexPath.row];
}
//_searchController.active = NO;
//这样的话就可以实现下边跳转到sec页面的方法了，因为取消了它的活跃，能看到有个动作是直接回到了最初的界面，然后才执行的跳转方法
NSLog(@"sec.number = %@",sec.number);
//下边这五个方法貌似没什么卵用。会在此时同时打印出来
[self willPresentSearchController:_searchController];
[self didPresentSearchController:_searchController];
[self willDismissSearchController:_searchController];
[self didDismissSearchController:_searchController];
[self presentSearchController:_searchController];
}
// 6.添加多个按钮在Cell
- (NSArray *)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath
{
_cureHistoryDeleteBtnString = @"删除";
// 添加一个删除按钮
UITableViewRowAction *deleteRowAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDestructive title:_cureHistoryDeleteBtnString handler:^(UITableViewRowAction *action, NSIndexPath *indexPath) {
NSLog(@"删除本行");
/*
// 1.删除数据源
[self.dataArray removeObject:lastModel];
// 2.删除数据库
NSArray *lastPointModels = [manager selectModelArrayInDatabase:localDatabaseName table:@"tcmt_cure_acupoints" modelName:@"LastPointModel" selectFactor:[NSString stringWithFormat:@"WHERE cure_id = '%@'", lastModel.cure_id]];
for (LastPointModel *lastPointModel in lastPointModels) {
[manager deleteModelWithDatabase:localDatabaseName table:@"tcmt_cure_acupoints" model:lastPointModel];
}
[manager deleteModelWithDatabase:localDatabaseName table:@"tcmt_cure" model:lastModel];
// 3.更新UI
[tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
// 4.是否显示infoLabel
if (self.dataArray.count == 0) {
self.infoLabel.text = _cureHistoryInfoLabelString;
self.infoLabel.hidden = NO;
}
*/
}];
return @[deleteRowAction];
}
#pragma mark- SearchController
- (void)createSearch{
_searchController = [[UISearchController alloc] initWithSearchResultsController:nil];
_searchController.searchResultsUpdater = self;
_searchController.searchBar.delegate = self;//*****这个很重要，一定要设置并引用了代理之后才能调用searchBar的常用方法*****
_searchController.dimsBackgroundDuringPresentation = NO;//是否添加半透明覆盖层
_searchController.hidesNavigationBarDuringPresentation = NO;//是否隐藏导航栏
_searchController.searchBar.frame = CGRectMake(self.searchController.searchBar.frame.origin.x, self.searchController.searchBar.frame.origin.y, self.searchController.searchBar.frame.size.width, 44.0);
self.tableView.tableHeaderView = self.searchController.searchBar;
}
//展示搜索结果
-(void)updateSearchResultsForSearchController:(UISearchController *)searchController {
NSString *searchString = [self.searchController.searchBar text];
NSPredicate *preicate = [NSPredicate predicateWithFormat:@"SELF CONTAINS[c] %@", searchString];
if (self.searchList!= nil) {
[self.searchList removeAllObjects];
}
//过滤数据
self.searchList= [NSMutableArray arrayWithArray:[_dataList filteredArrayUsingPredicate:preicate]];
//刷新表格
[self.tableView reloadData];
}
//
#pragma mark - UISearchControllerDelegate
- (void)willPresentSearchController:(UISearchController *)searchController
{
NSLog(@"willPresentSearchController");
}
- (void)didPresentSearchController:(UISearchController *)searchController
{
NSLog(@"didPresentSearchController");
}
- (void)willDismissSearchController:(UISearchController *)searchController
{
NSLog(@"willDismissSearchController");
}
- (void)didDismissSearchController:(UISearchController *)searchController
{
NSLog(@"didDismissSearchController");
}
- (void)presentSearchController:(UISearchController *)searchController
{
NSLog(@"presentSearchController");
}
//以下的两个方法必须设置_searchController.searchBar.delegate 才可以
-(BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar{
NSLog(@"开始编辑");
return YES;
}
-(BOOL)searchBarShouldEndEditing:(UISearchBar *)searchBar{
NSLog(@"结束编辑");
return YES;
}
-(BOOL)searchBar:(UISearchBar *)searchBar shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{
NSLog(@"正在编辑");
return YES;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
现在UISearchController里边有一个属性UISearchBar，所以要设置它的属性的话，还是可以用以前的那些，有兴趣可以查看 UISearchBar详解(一)基本属性
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