Imitating the iphone address book search function.

Imitating the iphone address book

The project has previously implemented the pinyin sorting Address Book Design. Now you can search for the address book.

The original interface is as follows:

The search function depends on uisearchbar uisearchdisplaycontroller.

Step 1 initialization: Initialize searbar and seardisplaycontroller, and the corresponding two arrays (used to display all results and search results) and corresponding delegate

@interface ComunicationViewController ()
 
  {    UISearchDisplayController *searchDisplayController;    UISearchBar *searchBar;    NSArray *allItems;    NSArray *searchResults;}
 

SearchBar = [[UISearchBar alloc] init]; searchBar. delegate = self; searchBar. placeholder = @ "enter your name"; [searchBar setAutocapitalizationType: UITextAutocapitalizationTypeNone]; [searchBar sizeToFit]; comunicationTabelView. tableHeaderView = searchBar; // comunicationTabelView. frame = CGRectMake (0, 0,320, comunicationTabelView. frame. size. height); searchDisplayController = [[UISearchDisplayController alloc] initWithSearchBar: searchBar contentsController: self]; [searchDisplayController setDelegate: self]; [searchDisplayController setSearchResultsDataSource: self];

Step 2: A matching method and two delegate

- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope {        NSPredicate *resultPredicate = [NSPredicate predicateWithFormat:@"SELF contains[cd] %@",                                     searchText];        searchResults = [[allItems valueForKey:@"RealName"] filteredArrayUsingPredicate:resultPredicate];    [searchResults retain];    NSLog(@"%@",searchResults);    }#pragma mark - UISearchDisplayController delegate methods-(BOOL)searchDisplayController:(UISearchDisplayController *)controller  shouldReloadTableForSearchString:(NSString *)searchString {        [self filterContentForSearchText:searchString  scope:[[self.searchDisplayController.searchBar scopeButtonTitles]  objectAtIndex:[self.searchDisplayController.searchBar                                                      selectedScopeButtonIndex]]];        return YES;    }- (BOOL)searchDisplayController:(UISearchDisplayController *)controller  shouldReloadTableForSearchScope:(NSInteger)searchOption {        [self filterContentForSearchText:[self.searchDisplayController.searchBar text] scope:[[self.searchDisplayController.searchBar scopeButtonTitles] objectAtIndex:searchOption]];        return YES;    }

The most important thing is tableview judgment during loading.

# Pragma mark-comunicationTableView the number of rows in the proxy method // section-(NSInteger) tableView :( UITableView *) tableView numberOfRowsInSection :( NSInteger) section {if (tableView = searchDisplayController. searchResultsTableView) {return searchResults. count;} else {return [[numArr objectAtIndex: section] intValue] ;}// height-(CGFloat) tableView :( UITableView *) tableView heightForRowAtIndexPath :( NSIndexPath *) indexPath {return 50;} // number of sections-(NSInteger) numberOfSectionsInTableView :( UITableView *) tableView {if (tableView = searchDisplayController. searchResultsTableView) {return 1;} else {return ziMuArr. count ;}// section name-(NSString *) tableView :( UITableView *) tableView titleForHeaderInSection :( NSInteger) section {if (tableView = searchDisplayController. searchResultsTableView) {return nil;} else {return [ziMuArr objectAtIndex: section] ;}- (NSArray *) sectionIndexTitlesForTableView :( UITableView *) tableView {if (tableView = searchDisplayController. searchResultsTableView) {return nil;} else {return ziMuArr ;}}

Finally, we achieved the following: