In this screencast I’ll talk you through the lingo of Core Data: those scary classes and expressions that you’ll frequently come across. In fact, this is the start of a new series: Core Data Nuggets are bite-sized chunks about the framework. Dip in and out or watch them all in a row and learn how this … Read more
In this screencast I will show you how to tear down your Core Data Stack. Documentation on this topic is a little sketchy to say the least. We’ll create a new Master/Detail app and implement a button that will remove the store file and reset the entire stack – without nasty error messages or app … Read more
How to tweak SQLIte Performance in Core Data – thanks to @artandlogic
Sometimes it can be useful to split your Core Data Store File across multiple files. For example, one file could live on the local file system, while the other could live in iCloud. We can do this by telling the Xcode Model Editor to add more than one Configuration, each of which can be allocated […]
Core Data can handle several versions of your Model. It’s easy to add a version (via Editor – Add Model Version) and set it active, but it’s not so easy to remove a version you no longer need. Thankfully there is a way to delete version files which goes a long way to declutter your […]
You can create Fetch Requests in the Xcode model editor, including a Predicate. These are somewhat easier to setup. To create one, select your .xcdatamodeld file, then head over to Editor – Add Fetch Request. Give it a catchy name and a filter property, and much of the above code becomes obsolete. Here’s how you […]
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, […]
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 […]
