本地搜索联想

用到过的方法总结一下，以免遗忘。
拿到数据源之后，筛选所需的数据。数据源的getFriendsArray为模型数组

/**
 *  搜索
 *
 *  @param searchText searchText description
 */
- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope {
    
    NSPredicate *resultPredicate = [NSPredicate predicateWithFormat:@"SELF contains[cd] %@", searchText];
    self.searchResultArray = (NSMutableArray *)[[self.getFriendsAPIManager.getFriendsArray valueForKey:@"nickname"] filteredArrayUsingPredicate:resultPredicate];
    NSLog(@"%@",self.searchResultArray);
}

在UISearchDisplayController代理里面进行操作

#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;
    
}