Swift Task and TaskGroup: Performing Asynchronous Operations with Async/Await

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Swift’s Async/Await offers a more straightforward way to manage asynchronous code, but sometimes you need more control over parallel tasks. In this blog post, we’ll explore Task and TaskGroup, which allow you to manage multiple asynchronous operations using Async/Await effectively.

Example 1: Basic Task Usage

Defining a Simple Async Function

func fetchData() async -> Data {
    // Simulate fetching data
    await Task.sleep(1_000_000_000)
    return Data()
}

Running fetchData using Task

let dataTask = Task {
    let data = await fetchData()
    // Process data
}

Cancelling a Task

dataTask.cancel()

Example 2: TaskGroup Basics

Fetching Data from Multiple URLs

func fetchData(from url: URL) async -> Data {
    // Simulate fetching data
    await Task.sleep(1_000_000_000)
    return Data()
}

let urls = [
    URL(string: "https://api.example.com/data1")!,
    URL(string: "https://api.example.com/data2")!,
    URL(string: "https://api.example.com/data3")!
]