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Interactive Widgets With SwiftUI | Kodeco


Apple launched Widgets in iOS 14 and introduced a contemporary look that modified our cellphone’s house screens. The framework advanced via the years, including a strong technique of preserving customers up to date with their information.

iOS 17 takes widgets to the following degree by introducing interactivity. Customers can now work together together with your app in a brand new, modern approach that wasn’t attainable earlier than.

By making your app’s important actions accessible in a widget, your customers have a extra handy and fascinating option to work together together with your app.

On this tutorial, you’ll add interactive widgets to the Trask app utilizing SwiftUI.

In the event you’re excited about studying SwiftUI, widgets’ easy views are an excellent place to begin with.

This tutorial covers the next subjects.

  • What interactive widgets are and the way they work.
  • The best way to create interactive widgets with a SwiftUI animation.
  • Several types of interactive widgets that you may create.
  • Greatest practices for designing and creating interactive widgets.

Though there are not any strict stipulations, a fundamental information of SwiftUI and WidgetKit is likely to be useful. Anyway, don’t fear, you’ll have a fast recap to begin off on the precise foot.

Getting Began

Obtain the starter undertaking by clicking the Obtain Supplies button on the prime or backside of this tutorial. Open the starter undertaking (Trask.xcodeproj) within the Starter folder.
Construct and run the undertaking, and you need to see the Trask preliminary display screen.

Trask's main screen.

Trask is a common tracker app that tracks completely different duties/issues/habits through the day, such because the variety of glasses of water, medication, yoga, and so forth.
The primary time you launch the app, Trask creates some pattern information so you possibly can see the various kinds of duties you possibly can create.

  • Job with a number of steps.
  • “TODO” activity with only one step.

When tapping the plus button, the app advances the duty, and as soon as it reaches its goal, it passes within the accomplished state.
The consumer can delete duties by swiping left on them and might add new ones utilizing the button on the backside of the View.

Recapping WidgetKit

Earlier than you get into the recent subject of this tutorial, familiarize your self with some fundamental ideas on WidgetKit to construct widespread terminology for the remainder of the tutorial.

Word: To learn to add Widgets, and for a deep dive into Widgets, please check out the superb tutorial Getting Began With Widgets.

Including an iOS Widget

Trask comes with a static widget to comply with the standing of a selectable activity.
Add an occasion of the widget to see the way it appears to be like.

  1. Construct and run the undertaking.
  2. Reduce the app.
  3. Lengthy press on an empty space of the display screen.
  4. Then faucet the + button, seek for Trask, and choose the widget accessible.

Add Trask Widget.

You’re now prepared to leap into the code construction to see the way it works.

Widget Code Construction

The TraskWidgets folder of the starter undertaking comprises all of the recordsdata associated to the widget.

Making the Widget Interactive

Knowledge Sharing With The App

Timeline Supplier

Updating Widgets

Varieties of Interactivity

Widgets and Intents

Including the Intent

As you may even see, the widget code is contained in a separate Xcode goal, and iOS runs the widget in a course of completely different from the app. This element may appear delicate, but it surely’s essential when contemplating that the app and the widget must share the identical information. The widget code can’t merely name some capabilities within the app goal. Among the many completely different potentialities, Trask makes use of a UserDefault retailer on an App Group container shared between the app and the widget.

Data Sharing.

Timeline is a key idea of Widgets. To protect battery and system assets, iOS doesn’t continually run your widget. As an alternative, it asks your timeline supplier to generate a collection of timeline entries to render your widget and current it on the proper time.

Your TaskTimelineProvider defines three strategies.

As mentioned above, the timeline(for:in:) returns the array of entries on the specified time, however what occurs after the final widget view is introduced? Enter the widget replace technique!

When returning the timeline of entries, you additionally present one technique for updating the timeline. It’s possible you’ll select between the three choices beneath.

In our case, the Trask timeline supplier returns the .by no means insurance policies since there is no such thing as a want for the widget to replace its view. The one option to replace the standing of a activity is thru the app when the consumer faucets to step a activity…till the following chapter. :]

Wow…that was a protracted warmup, however now you’re prepared so as to add interplay to the Trask standing widget.

Beginning with iOS 17, iPadOS 17 and macOS 14, Apple permits two predominant methods of interactivity together with your widget: buttons and toggles.

As the primary enchancment, you’ll add a step button to the Trask Standing Widget so customers can progress their favourite duties with out opening the app.

When including interactivity, the widget’s button can’t invoke code in your app, but it surely does should depend on a public API uncovered by your app: App Intents.

App intents expose actions of your app to the system in order that iOS can carry out them when wanted. For instance, when the consumer interacts with the widget button.

Widgets and Intent.

Moreover, you can even use the identical App Intent for Siri and Shortcuts.

Firstly, add the intent methodology that your button will invoke when pressed. Open TaskIntent.swift and add the carry out() methodology to TaskIntent.

The AppIntent‘s carry out() methodology is the one known as when an Intent is invoked. This methodology takes the chosen activity as enter and calls a way within the retailer to progress this activity.

Please word that UserDefaultStore is a part of each the app and the widget extension so as to reuse the identical code in each targets. :]

Subsequent, open TaskStore.swift and add a definition of the stepTask(_:) methodology to the protocol TaskStore.

Then, add the stepTask(_:) methodology to UserDefaultStore. This methodology masses all of the duties contained within the retailer, finds the required activity, calls the duty’s progress() methodology and saves it again within the retailer.

Lastly, add an empty stepTask(_:) methodology to SampleStore to make it compliant with the brand new protocol definition.

    • TaskIntent is an intent conforming to the WidgetConfigurationIntent protocol. Right here, the intent permits the duty choice within the Edit Widget menu.
    • TaskStatusWidget is the precise widget. 4 components compose the widget file.

      • TaskTimelineProvider specifies when iOS ought to refresh the widget display screen.
      • TaskEntry represents the mannequin of the widget view. It comprises a date iOS makes use of to replace the widget view with the duty merchandise.
      • TaskStatusWidgetEntryView defines the widget view utilizing SwiftUI. It comprises a timeline entry as a parameter, and it ought to lay out the widget based mostly on this parameter worth.
      • TaskStatusWidget binds all of the components collectively inside a WidgetConfiguration.
      • Lastly, TraskWidgetBundle declares all of the extension’s widgets.
      • placeholder(in:) ought to return some pattern information to render the placeholder UI whereas ready for the widget to be prepared. SwiftUI applies a redaction impact to this view.
      • snapshot(for:in:) supplies the info to render the widget within the gallery introduced when selecting a widget.
      • timeline(for:in:) is the primary methodology that returns the timeline entries to current on the specified time.
      • .atEnd recomputes the timeline after the final date within the timeline passes.
      • .after(_:) specifies roughly when to request a brand new timeline.
      • .by no means tells the system to by no means recompute the timeline. The app will immediate WidgetKit when a brand new timeline is out there.
      • Buttons are appropriate to symbolize an motion on the widget content material.
      • Toggles higher establish a binary actionable state on/off. Comparable to our TODO activity standing.

      Word: On a locked gadget, buttons and toggles are inactive, and iOS doesn’t carry out actions till the consumer unlocks his gadget.

      func carry out() async throws -> some IntentResult {
        UserDefaultStore().stepTask(taskEntity.activity)
        return .end result()
      }
      
      protocol TaskStore {
        func loadTasks() -> [TaskItem]
        func saveTasks(_ duties: [TaskItem])
        func stepTask(_ activity: TaskItem)
      }
      
      func stepTask(_ activity: TaskItem) {
        var duties = loadTasks()
        guard let index = duties.firstIndex(the place: { $0.id == activity.id }) else { return }
      
        duties[index].progress()
        saveTasks(duties)
      }
      
  • TaskIntent is an intent conforming to the WidgetConfigurationIntent protocol. Right here, the intent permits the duty choice within the Edit Widget menu.
  • TaskStatusWidget is the precise widget. 4 components compose the widget file.

    • TaskTimelineProvider specifies when iOS ought to refresh the widget display screen.
    • TaskEntry represents the mannequin of the widget view. It comprises a date iOS makes use of to replace the widget view with the duty merchandise.
    • TaskStatusWidgetEntryView defines the widget view utilizing SwiftUI. It comprises a timeline entry as a parameter, and it ought to lay out the widget based mostly on this parameter worth.
    • TaskStatusWidget binds all of the components collectively inside a WidgetConfiguration.
    • Lastly, TraskWidgetBundle declares all of the extension’s widgets.
    • placeholder(in:) ought to return some pattern information to render the placeholder UI whereas ready for the widget to be prepared. SwiftUI applies a redaction impact to this view.
    • snapshot(for:in:) supplies the info to render the widget within the gallery introduced when selecting a widget.
    • timeline(for:in:) is the primary methodology that returns the timeline entries to current on the specified time.
    • .atEnd recomputes the timeline after the final date within the timeline passes.
    • .after(_:) specifies roughly when to request a brand new timeline.
    • .by no means tells the system to by no means recompute the timeline. The app will immediate WidgetKit when a brand new timeline is out there.
    • Buttons are appropriate to symbolize an motion on the widget content material.
    • Toggles higher establish a binary actionable state on/off. Comparable to our TODO activity standing.

    Word: On a locked gadget, buttons and toggles are inactive, and iOS doesn’t carry out actions till the consumer unlocks his gadget.

    func carry out() async throws -> some IntentResult {
      UserDefaultStore().stepTask(taskEntity.activity)
      return .end result()
    }
    
    protocol TaskStore {
      func loadTasks() -> [TaskItem]
      func saveTasks(_ duties: [TaskItem])
      func stepTask(_ activity: TaskItem)
    }
    
    func stepTask(_ activity: TaskItem) {
      var duties = loadTasks()
      guard let index = duties.firstIndex(the place: { $0.id == activity.id }) else { return }
    
      duties[index].progress()
      saveTasks(duties)
    }
    
  • TaskTimelineProvider specifies when iOS ought to refresh the widget display screen.
  • TaskEntry represents the mannequin of the widget view. It comprises a date iOS makes use of to replace the widget view with the duty merchandise.
  • TaskStatusWidgetEntryView defines the widget view utilizing SwiftUI. It comprises a timeline entry as a parameter, and it ought to lay out the widget based mostly on this parameter worth.
  • TaskStatusWidget binds all of the components collectively inside a WidgetConfiguration.
  • Lastly, TraskWidgetBundle declares all of the extension’s widgets.
  • placeholder(in:) ought to return some pattern information to render the placeholder UI whereas ready for the widget to be prepared. SwiftUI applies a redaction impact to this view.
  • snapshot(for:in:) supplies the info to render the widget within the gallery introduced when selecting a widget.
  • timeline(for:in:) is the primary methodology that returns the timeline entries to current on the specified time.
  • .atEnd recomputes the timeline after the final date within the timeline passes.
  • .after(_:) specifies roughly when to request a brand new timeline.
  • .by no means tells the system to by no means recompute the timeline. The app will immediate WidgetKit when a brand new timeline is out there.
  • Buttons are appropriate to symbolize an motion on the widget content material.
  • Toggles higher establish a binary actionable state on/off. Comparable to our TODO activity standing.

Word: On a locked gadget, buttons and toggles are inactive, and iOS doesn’t carry out actions till the consumer unlocks his gadget.

func carry out() async throws -> some IntentResult {
  UserDefaultStore().stepTask(taskEntity.activity)
  return .end result()
}
protocol TaskStore {
  func loadTasks() -> [TaskItem]
  func saveTasks(_ duties: [TaskItem])
  func stepTask(_ activity: TaskItem)
}
func stepTask(_ activity: TaskItem) {
  var duties = loadTasks()
  guard let index = duties.firstIndex(the place: { $0.id == activity.id }) else { return }

  duties[index].progress()
  saveTasks(duties)
}
func stepTask(_ activity: TaskItem) {}
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