NSOpenPanel is surprisingly easy to use: create the panel, call the openPanel method, and handle the returned URL object in a block. In this example we invoke the panel from a button in the main window, then display the returned URL in a textLabel: – (IBAction)loadFile:(id)sender { // create an open documet panel NSOpenPanel *panel […]
This podcast describes how to gain access to WordPress even without username, password or working email address. It’s happened to the best of us: you forgot your Password you forgot what User you are even worse, you’ve forgotten which email you’ve used when you installed WordPress worse still, your email no longer exists Fear not, … Read more
If the App Delegate has something that your top view controller needs then you simply pass it the required object via a property set on the top view controller. This is easy when your top view controller is also the root view controller. However, when you embed your top view controller in a Navigation Controller, […]
Likewise, here’s how we return the number of rows using a fetched results controller – as provided by the Master / Detail template: – (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { id <NSFetchedResultsSectionInfo> sectionInfo = [[self.fetchedResultsController sections]objectAtIndex:section]; return [sectionInfo numberOfObjects]; }
I can never remember how to do this. Here’s the method provided by the Master / Detail template when using Core Data: – (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return [[self.fetchedResultsController sections] count]; }
By default Mac Apps use XML as store type when saving in Core Data, even though it can use other formats – such as SQLite, which is the default on iOS. Here’s a way to quickly convert one into the other. Note that this is designed as a one-off operation to create a new store […]
I was excited to find out that it is possible to write a Mac App with Core Data completely without code! This magic is possible with something that’s not available in iOS (yet) called Cocoa Bindings. You provide the user controls you need in Xcode, then control-drag your way to extensive functionality and happiness. Before […]
NSAssert is a macro which allows you to test for specific values if and when they occur. Rather than having to figure out where your app has passed the wrong value several stages before a problem happened, NSAssert can be used like NSLog – with the helpful difference that if all is well, there’s no […]
