DevFright

Learn How to Create iOS Apps

How to Use UndoManager with SwiftData

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SwiftData is a framework that is built on top of Core Data and greatly simplifies working with data in your SwiftUI app. One caveat is that not all functionality of Core Data can be found in SwiftData. In this turorial we’ll look at the UndoManager that tracks changes and allows you to undo and redo changes you have made. This can be extremely useful for apps that implement SwiftData. SwiftData makes this process extremely simple to configure.

Lets begin with the app created in the ToDo List app with SwiftData. You can download this below.

ToDoDownload
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How to Create a Simple To-Do List with Swipe Actions in SwiftUI Using SwiftData

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In a recent tutorial, we looked at the SwiftUI List and included a very brief introduction to Swipe actions. In this tutorial we’ll expand on this in the form of a simple To-Do list app that allows you to swipe to flag or delete tasks. We will also utilise SwiftData hosted in CloudKit so that tasks can be synchronised across devices.

Start by creating a new iOS app by opening Xcode and selecting New > Project.

Select SwiftUI for interface, Swift for language, SwiftData for storage, and make sure Host in CloudKit is selected. Ensure that you select a Team that is a company and not the personal option. SwiftData stored in iCloud requires a development team to be selected.

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Syncing SwiftData with iCloud: A Step-by-Step Guide to Setting Up Cloud Sync in Your SwiftUI App

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In building a note-taking app for meetings, I need to synchronise notes between devices, primarily between the iPad and iPhone. I was already using SwiftData for the models, and after some research, I found that it is relatively simple syncing SwiftData with iCloud. I should say that its simple to enable, but then you might run into some errors that you need to fix with your models and the classes or structs that use those models. This tutorial will cover what you need to know to get moving quickly.

Enabling iCloud support requires that you have a developer account. It is also best to test on actual devices rather than in the simulator. Before proceeding, check that signing is set to your development team account rather than the personal account you have. Assuming you already have a project to which you need to add iCloud support, follow along. If you are starting a new project, then ensure that you select SwiftData for storage and check the “Host in CloudKit” box.

To activate iCloud, in the Target, select + Capability.

Add iCloud and you’ll see the following added.

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