Ios – Can’t use UISearchController with UICollectionView

iosuicollectionviewuisearchbar

In the WWDC 2014 talk " A Look Inside Presentation Controllers" the presenters showed how to setup a UISearchController in a UITableView. They do this by setting the searchController's searchBar's frame, then setting it as the tableView's tableHeaderView. Unfortunately, there isn't an equivalent of tableHeaderView for UICollectionView. With UISearchDisplayController, this would be simple: create a UISearchBar and add it to a custom UICollectionView section header, then initialize the UISearchDisplayController with the search bar. The problem is, you can't initialize a UISearchController with a UISearchBar, or even set the searchBar because it's a read-only property. I guess my real question is, what are my options? Is there a "good" way to implement search without UISearchDisplayController or UISearchController?

Best Answer

With UISearchDisplayController, this would be simple: create a UISearchBar and add it to a custom UICollectionView section header, then initialize the UISearchDisplayController with the search bar

The search bar in a UISearchController is created for you. When you are asked the supplementary view in the data source method

- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath

add the searchController.searchBar as a subview of the supplementary view. Don't forget to call

[searchController.searchBar sizeToFit]

in order to give the search bar the appropriate size.

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Javascript – Sort Checkbox List on the basis of checked property

if you want to sort the check-box-list on the server side, you can first add the items from DTB to the check-box-list and set their Selected value to true, then add the others form DTA and for each item in DTA make sure it's not already in the list of items.
when inserting the two lists make sure they are sorted according to a secondary sort criteria if you need one.

if you don't need the sorting to take place on the server side you can use jquery to do that quite easily.
you need to get the check_box_list_client_id from the server, you can do that using
$('#<%= CheckBoxList1.ClientID %>') jquery selector.


    $(function() {  
        // get the containing element - should be an HTML table
        var cbl = $('#check_box_list_client_id');
        // check if the jquery element has any items in it
        if (cbl.length) {
            // get all the table rows, and filter out all those which
            // doesn't contain a checked checkbox
            var cbElements = cbl.find('TR').filter(function(index, element) {  
                return $(this).find('input:checked').length;  
            });  
            // take each table row containing a checked checkbox and place it
            // at the top of your check-box-list element we called cbl
            cbElements.each(function() {  
                $(this).prependTo(cbl);  
            });  
        }  
    });

thats it, hope it got you where you needed.

Best Answer

Related Solutions

Javascript – Sort Checkbox List on the basis of checked property

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