June 2016
Intermediate to advanced
214 pages
5h 40m
English
Content preview from Core Data in Swift
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NSSortDescriptor
NSSortDescriptor has been around longer than Core Data, and it’s still quite useful for ordering data. As mentioned previously, data that comes from a to-many relationship is unordered by default, and it’s up to us to order it. So, if we wanted to retrieve all the recipes and sort them by their name property in alphabetical order, we’d require another step as part of the fetch.
| | let fetch = NSFetchRequest(entityName: "Recipe") |
| | fetch.sortDescriptors = [NSSortDescriptor(key: "name", ascending: true)] |
In this example, we are retrieving all the Recipe entities by creating an NSFetchRequest with the NSEntityDescription set to our entity and no predicate. However, in addition to fetching the Recipe entities, we want ...
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