The easiest way to access a readily available save method is by importing AppDelegate into the class that wants to execute the save. Then we call a method in AppDelegate: AppDelegate *myAppDelegate = (AppDelegate *)[[UIApplication sharedApplication]delegate]; [myAppDelegate saveContext]; No reference to fetchedResultsController or managedObjectContext or any complex &error statements.
Protocols are a great way to delegate responsibility from one class to another. Consider a view controller that brings up another view controller via a modal segue. Let’s call them ViewController and DetailViewController. When it comes to dismissing that DetailViewController, he could do it himself via [self dismissViewControllerAnimated:YES completion:nil]; However, the first ViewController wouldn’t be […]
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 […]
In this podcast I will show you how to restore a WordPress site that we’ve backed up in the previous show. In particular, we will restore a remote website to our local system first, and because it’s a rather tricky process we’ll also install it on another remote host. For both examples the domain will … Read more
It has happened to us all: you’re in a storyboard, you’re using the Assistant Editor, you want to control-drag from a button into your code and create an action. But sadly you forget to select “Action” from the drop down menu and instead create an outlet. No biggie you think, deleting the outlet code. You […]
Imagine you had an NSString and wanted to save it as an integer value. You can use the intValue method for that: NSString *myString = @”47″; int myInt = [myString intValue]; To do the reverse, you can use the initWithFormat method: int myInt = 32; NSString *myOtherString = [[NSString alloc]initWithFormat:@”%i”, myInt];
