Question

据我所知，UISearchDisplayController在iOS 8.0中已被弃用，但是新的UISearchController并没有很多好的文档，所以我使用了前者。请耐心等待。

现在，我正在使用XIB文件。我知道对于常规的tableview，您可以通过进入XIB并从＆＃34; Selection＆＃34;下的下拉列表中选择Multiple Selection来允许多个单元格选择。

但是如何在UISearchBar的过滤搜索结果中实现这一点？据我所知，从技术上讲，我基本上有两个单独的表视图。

在这种情况下，我可以在常规表视图中使用多单元格选择（当我没有使用过滤器时）但是我不能在filter-tableview中这样做。我为常规tableview所做的只是允许多次选择＆＃34;在XIB中。我不知道如何为filter-tableview这样做。

以下是构建我的tableview和搜索栏的所有相关代码。

    #pragma mark Search Bar Methods

- (void)filterContentForSearchText:(NSString*)searchText scope: (NSString *) scope
{
    NSPredicate *resultPredicate = [NSPredicate predicateWithFormat:@"firstName BEGINSWITH[c] %@", searchText];
    self.searchResults = [[self.tbContactsGrabber.savedArrayOfContactsWithPhoneNumbers filteredArrayUsingPredicate:resultPredicate]mutableCopy];
}


- (BOOL) searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString {
    [self filterContentForSearchText:searchString scope:[[self.searchDisplayController.searchBar scopeButtonTitles]objectAtIndex:[self.searchDisplayController.searchBar selectedScopeButtonIndex]]];

    return YES;
}

- (void)searchDisplayController:(UISearchDisplayController *)controller didHideSearchResultsTableView:(UITableView *)tableView {
    [tableView reloadData];
    [self.tableView reloadData]; //these two lines make sure that both Filterview and Tableview data are refreshed - without it, it doesn't work

}



#pragma mark Tableview Delegate Methods
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

    if (tableView == self.searchDisplayController.searchResultsTableView) {
        return [self.searchResults count];
    }
    else {
        return (self.tbContactsGrabber.savedArrayOfContactsWithPhoneNumbers.count);
    }
}


- (UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell"];

    if(!cell){
        cell =
        [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"Cell"];
    }

    Contact *selectedContact;
    if (tableView == self.searchDisplayController.searchResultsTableView){
    //if we are in filter search results view
        selectedContact = [self.searchResults objectAtIndex:indexPath.row];
        if (selectedContact.checkmarkFlag == YES) {
            cell.accessoryType = UITableViewCellAccessoryCheckmark;
        }
        else if (selectedContact.checkmarkFlag == NO) {
            cell.accessoryType = UITableViewCellAccessoryNone;
        }
    }
    else {
    //if we are in regular table view
        selectedContact = [self.tbContactsGrabber.savedArrayOfContactsWithPhoneNumbers objectAtIndex:indexPath.row];
        if (selectedContact.checkmarkFlag == YES) {
            cell.accessoryType = UITableViewCellAccessoryCheckmark;
        }
        else if (selectedContact.checkmarkFlag == NO) {
            cell.accessoryType = UITableViewCellAccessoryNone;
        }
    }

    cell.selectionStyle = UITableViewCellSelectionStyleNone;
    //to make sure there's no gray highlighting when it's clicked - important

    NSString *fullName = [NSString stringWithFormat:@"%@ %@", selectedContact.firstName, selectedContact.lastName];
    cell.textLabel.text = fullName;
    return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
    Contact *selectedContact;

    //if its filterview mode
    if (tableView == self.searchDisplayController.searchResultsTableView){

        selectedContact = [self.searchResults objectAtIndex:indexPath.row];
            if (selectedContact.checkmarkFlag == YES) {
            selectedContact.checkmarkFlag = NO;
            cell.accessoryType = UITableViewCellAccessoryNone;
            [self.selectedContacts removeObject:selectedContact];
        }
        else {
            selectedContact.checkmarkFlag = YES;
            cell.accessoryType = UITableViewCellAccessoryCheckmark;
            [self.selectedContacts addObject:selectedContact];
        }
    }

    //if its just regular tableview mode, and you selected something
    else {
        selectedContact = [self.tbContactsGrabber.savedArrayOfContactsWithPhoneNumbers objectAtIndex:indexPath.row];
        selectedContact.checkmarkFlag = YES;
        cell.accessoryType = UITableViewCellAccessoryCheckmark;
        [self.selectedContacts addObject:selectedContact];
    }

    NSLog(self.selectedContacts.description);
}


- (void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
    Contact *selectedContact;
    selectedContact = [self.tbContactsGrabber.savedArrayOfContactsWithPhoneNumbers objectAtIndex:indexPath.row];
    selectedContact.checkmarkFlag = NO;
    cell.accessoryType = UITableViewCellAccessoryNone;
    [self.selectedContacts removeObject:selectedContact];

    NSLog(self.selectedContacts.description);
}

Answer 1

哇，结果证明这是一个非常简单的解决方案。只需将它放在viewDidLoad或您喜欢的任何地方。

self.searchDisplayController.searchResultsTableView.allowsMultipleSelection = YES;

现在，您的过滤器表视图允许多个选择。

Answer 2

我之前已经回答了UITableViewController with UISearchDisplayController multiple selection sync

我怀疑这个问题与上面提到的问题重复。

如何从搜索栏和SearchDisplayController的筛选结果中选择多个表行？

2 个答案: