ตัวปรับแต่ง .task

Often you want to fetch data the moment a screen shows. The .task modifier runs async work exactly when the view appears. ⏱️

Add .task to any view and give it an async closure. SwiftUI starts that work as the view comes on screen.

Inside .task you can freely use await. That makes it the natural home for your URLSession fetch on appearance.

The older onAppear cannot await async work directly. The .task modifier is built for concurrency, so prefer it for loading.

When the view disappears, SwiftUI cancels the task for you. That stops wasted work and avoids updating a gone view. ✨

Pass an id to .task and it reruns whenever that value changes. Perfect for reloading when a selection updates.

Store results in @State so assigning them refreshes the UI. The view redraws as soon as the data arrives.

Wrap risky calls in do/catch inside the task. You can then set an error message that the view shows the user.

A .task closure starts on the main actor, so updating state and UI from it is safe without extra hopping.

By default .task runs once per appearance. For repeated refresh use pull-to-refresh or a changing id instead.

Call a named function from .task rather than stuffing logic inline. It keeps the view tidy and easy to read.

You learned that .task runs async work when a view appears, cancels on disappear, can rerun on an id, and is the go-to place to fetch. 👍