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模仿微信的查询框效果，开题报告，开题报告，自定义SearchController，实现了和系统默认的UISearchController相同的使用方式和代理回调。
和UISearchController相同的初始化方法：
[Actionscript3] 查看源文件 复制代码
- (JKRSearchController *)searchController { if (!_searchController) { JKRSearchResultViewController *resultSearchController = [[JKRSearchResultViewController alloc] init]; _searchController = [[JKRSearchController alloc] initWithSearchResultsController:resultSearchController]; _searchController.searchBar.placeholder = @'查询'; _searchController.hidesNavigationBarDuringPresentation = YES; _searchController.searchResultsUpdater = self; _searchController.searchBar.delegate = self; _searchController.delegate = self; } return _searchController; }和UISearchController相同的加载方式：
[Actionscript3] 查看源文件 复制代码
[self.tableView setTableHeaderView:self.searchController.searchBar];和UISearchController相同的代理回调：
[Actionscript3] 查看源文件 复制代码
#pragma mark - JKRSearchControllerhResultsUpdating - (void)updateSearchResultsForSearchController:(JKRSearchController *)searchController { NSString *searchText = searchController.searchBar.text; NSPredicate *predicate = [NSPredicate predicateWithFormat:@'(SELF CONTAINS %@)', searchText]; JKRSearchResultViewController *resultController = (JKRSearchResultViewController *)searchController.searchResultsController; if (!(searchText.length > 0)) resultController.filterDataArray = @[]; else resultController.filterDataArray = [self.dataArray filteredArrayUsingPredicate:predicate]; } #pragma mark - JKRSearchControllerDelegate - (void)willPresentSearchController:(JKRSearchController *)searchController { NSLog(@'willPresentSearchController, %@', searchController); } - (void)didPresentSearchController:(JKRSearchController *)searchController { NSLog(@'didPresentSearchController, %@', searchController); } - (void)willDismissSearchController:(JKRSearchController *)searchController { NSLog(@'willDismissSearchController, %@', searchController); } - (void)didDismissSearchController:(JKRSearchController *)searchController { NSLog(@'didDismissSearchController, %@', searchController); } #pragma mark - JKRSearchBarDelegate - (void)searchBarTextDidBeginEditing:(JKRSearchBar *)searchBar { NSLog(@'searchBarTextDidBeginEditing %@', searchBar); } - (void)searchBarTextDidEndEditing:(JKRSearchBar *)searchBar { NSLog(@'searchBarTextDidEndEditing %@', searchBar); } - (void)searchBar:(JKRSearchBar *)searchBar textDidChange:(NSString *)searchText { NSLog(@'searchBar:%@ textDidChange:%@', searchBar, searchText); }Demo地址：https://github.com/Joker-388/JKRCustomSearchController
