UISearchController的简单使用

项目中需要一个简单的搜索功能,基于此,首先想到的就是SearchBar了,以前没怎么接触过,以前一般是自己通过textfield来实现的,这次想通过这个来试试系统提供的.

@property (nonatomic ,strong)UISearchController *searchVC;

@property (nonatomic ,strong)NSMutableArray *exampleArr;

@property (nonatomic ,strong)NSMutableArray *searchArr;

先全局UISearchController和建数组.

再初始化

_searchVC = [[UISearchController alloc]initWithSearchResultsController:nil];

_searchVC.searchResultsUpdater = self;//代理

_searchVC.delegate = self;//代理

_searchVC.dimsBackgroundDuringPresentation = NO;//蒙版

_searchVC.hidesNavigationBarDuringPresentation = NO;//开启后自动至导航栏

self.definesPresentationContext = YES;//是否push界面后,隐藏搜索,返回后继续显示

_tableView.tableHeaderView = self.searchVC.searchBar;//添加上

#pragma mark - UISearchResultsUpdating

- (void)updateSearchResultsForSearchController:(UISearchController *)searchController

{

NSString *searchString = [self.searchVC.searchBar text];

NSPredicate *preicate = [NSPredicate predicateWithFormat:@"SELF CONTAINS[c] %@", searchString];

if (self.searchArr!= nil) {

[self.searchArr removeAllObjects];

}

//过滤数据

self.searchArr= [NSMutableArray arrayWithArray:[_exampleArr filteredArrayUsingPredicate:preicate]];

//刷新表格

[_tableView reloadData];

}