Before we do that however, let’s create a user interface for our app. That is extremely convenient for us and we are going to have a look at our NSManagedObject subclass in a moment. Xcode automatically generates classes for entities added in the model editor. Later, these attributes can be accessed in code, just like properties of class objects. We want to add an attribute called “added”, which is of the Type “Date”, and the second attribute will be called “foodType”, which should be of Type “String”: To add new attributes, you can click on the “Add Attribute” Button in the lower right corner of the model editor. Let’s rename this entity to “Food” and create some attributes for it. This will create a new entity which we can click once to select it, and once more to be able to rename it. So, click the round plus button at the bottom of the model editor. ![]() The attributes you can add to an entity are also represented as properties in the NSManagedObject subclasses.įor our Eat More Vegetable app, we only need one entity. Their names are also the names of the classes (subclasses of NSManagedObject), which are used to represent the entities in your application. You can think of entities as tables in a database. Core Data uses a scheme called a managed object model.Ī managed object model allows Core Data to map from records in a persistent store to managed objects that you use in your application. Much of Core Data’s functionality depends on the scheme you create to describe your application’s entities, their properties, and the relationships between them. If you open that file, Xcode is going to present the Core Data Model Editor to you: Having a look at the Navigator on the left, you should see one file that might be new to you: The EatMoreVegetable.xcdatamodel was automatically created by Xcode, because you activated “Use Core Data” when we set up the project. After saving the project at your favorite location, we should have a look at some of the files that Xcode generated for us. For the sake of this tutorial the most important thing is that you choose Swift as the project language and that you activate “User Core Data”. Let’s start with creating a new Xcode project and choosing the Single View Application Template. ![]() If you want to learn how to integrate notifications into this app, you can watch my YouTube video about iOS 10 User Notifications. However, this app function is not covered in this written tutorial. In the upper right corner, you also have a “Remind me” button, which allows you to schedule notifications to be regularly reminded about eating something healthy. At the same time, the type of food you chose and the time you pressed the button are saved using Core Data. When you press either button, the corresponding food is added to the table view in the lower third of the screen. It is going to be called Eat More Vegetable.īasically, there are two options: Eat fruit (represented by the apple button) or eat vegetable (represented by the salad taco button). To submit your apps, use the latest version of Xcode available on the Mac App Store or, when available, the latest Release Candidate from the Downloads page.For this tutorial, we are going to assume that the world needs another app to track your healthy food intake. ![]() Xcode provides an integrated workflow for Apple Developer Program members to prepare and submit apps to the App Store. For details on the latest released versions, including each beta release, view the Xcode release notes. ![]() You can also learn about the latest features and capabilities in Xcode. Learning about Xcodeįor step-by-step guidance on how to use Xcode to build, test, and submit apps to the App Store, take a look at Xcode documentation. Apple Developer Program membership is not required. To download Xcode, simply sign in with your Apple ID. The latest beta version and previous versions of Xcode can be downloaded from the Downloads page. The Mac App Store will notify you when an update is available or you can have macOS update automatically as it becomes available. The current release of Xcode is available as a free download from the Mac App Store. Xcode brings user interface design, coding, testing, debugging, and submitting to the App Store into a unified workflow. Xcode is a complete developer toolset for creating apps for Mac, iPhone, iPad, Apple Watch, and Apple TV.
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