We’ve recently discussed how to deal with a Search Bar and Search Display Controller using Interface Builder. You can however do this in code too. This can be useful if you don’t want to make all the relevant connections in every Storyboard. This example assumes you have a Table View (self.tableView) to which you’d like […]
On occasion we need to create an NSIndexPath manually, with components we specify (such as a row or a section). There’s a method for that: indexPath:forItem:inSection. Here’s how you create an indexPath for row 0, section 0: NSIndexPath *indexPath = [[NSIndexPath alloc]init]; indexPath = [NSIndexPath indexPathForItem:0 inSection:0]; The method takes two integers. You can even […]
Sometimes Xcode does a bit of magic behind the scenes which I don’t really understand. Consider this standard table view method to display cells: – (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@”Cell”]; // populate your cell return cell; } Where do we actually ever create a UITableViewCell? All we’re asking here […]
If you add a UISearchBar to your table view (see previous article) it’s just sitting there by default. Chances are you’d like to hide it when your table view first loads. You can do this by adding the following code to your viewWillAppear method: – (void)viewWillAppear:(BOOL)animated { // scroll the search bar off-screen CGRect newBounds […]
The ingredients for a search function in a UITableView are more involved than just displaying a simple search field. First we need the standard UITableView. Next we need a UISearchBar which can be added to the top of the table view. But displaying the actual search results is something called the UISearchDisplayController. This process isn’t […]
Apple have changed the UITableViewController template in iOS 6 a bit. Specifically, when you create a new UITableViewController class, it’s created using something like this (in the cellForRowAtIndexPath method): – (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @”Cell”; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath]; // Configure the cell… return cell; } When […]
By default, when you touch a cell in a UITableView, it lights up bright blue. You can use this property to change the cell’s selection style in the cellForRowAtIndexPath method: cell.selectionStyle = UITableViewCellSelectionStyleGray; Possible values are UITableViewCellSelectionStyleGray UITableViewCellSelectionStyleBlue (the default) UITableViewCellSelectionStyleNone Alternatively you can select the cell in Interface Builder and pick these values from […]
If you don’t want your cell to be highlighted you can de-select the option “User Interaction Enabled” in the storyboard. This is ticked by default. Untick it and nobody can select your cell anymore.
