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Swiftlee

Details

URL: 🔗 https://www.avanderlee.com

Author: Antoine van der Lee

Complexity Levels:

  • Beginner: 20%
  • Intermediate: 50%
  • Advanced: 30%

Frequency of Posting: Weekly

Types of Content:

  • Articles: 60% (In-depth guides and best practices)
  • Tutorials: 30% (Step-by-step explanations)
  • News: 10% (Updates on Swift, iOS, and WWDC)

Additional Features:

  • Newsletter: Regular updates on the latest Swift developments.
  • Courses: Detailed courses on iOS development and Swift concurrency.

The Avanderlee blog covers a broad range of topics aimed at iOS developers, particularly focusing on Swift's concurrency model, async/await, tasks, and practical code examples. The content caters to developers at various skill levels, with more emphasis on intermediate and advanced topics. Antoine van der Lee provides well-researched articles, often sharing insights into modern Swift practices and real-world code implementations.

Key Topics:

  • Concurrency in Swift: Articles explaining async/await, task management, and Swift’s concurrency model.
  • Swift UI Development: Practical guides and examples of implementing SwiftUI components.
  • Testing and Debugging: Comprehensive tutorials on testing Swift code using unit tests, async/await, and concurrency-safe global variables.

🔵 Understanding Tasks in Swift: A Guide to Concurrency​

Tasks in Swift are a key part of the concurrency framework introduced at WWDC 2021. They enable the creation of concurrent environments from non-concurrent methods, making it easier to call methods using async/await. By leveraging tasks, developers can streamline their code, reduce verbosity compared to dispatch queues, and handle asynchronous operations more effectively.

Details

URL: 🔗 Tasks in Swift explained with code examples

Published: 2024-09-01

Authors: Antoine van der Lee

Tags:
Swift, concurrency, async-await, iOS

Key Points​

  • Tasks are an integral part of Swift's concurrency model, enabling asynchronous code execution with async/await.
  • Cancellation handling within tasks ensures that unnecessary work is avoided, which is crucial for performance and resource management.
  • Prioritization of tasks allows developers to manage the order of execution, similar to dispatch queues but with simpler syntax.

Summary of Contents​

  • Introduction to Tasks in Swift: Provides an overview of how tasks are used in Swift, their purpose in the concurrency framework, and how they compare to dispatch queues.

  • Creating and Running Tasks:

    • Basic Task Creation: Demonstrates how to create a task in Swift, including how to return values or throw errors within a task.
    • Task Execution: Explains that tasks in Swift begin execution immediately upon creation, without the need for an explicit start command.

  • Handling Asynchronous Methods:

    • Async Method Execution: Illustrates how to use tasks to execute async methods within non-concurrent functions, including common errors and how to avoid them.

  • Task Cancellation:

    • Importance of Cancellation: Discusses the need to check for task cancellation to prevent unnecessary work, with examples of how to implement these checks.
    • Cancellation Techniques: Provides code examples for handling task cancellation using Task.checkCancellation() and Task.isCancelled.

  • Setting Task Priority:

    • Managing Execution Order: Explains how to set the priority for tasks, similar to quality of service levels in dispatch queues, to manage the order of task execution.

  • Thread Usage in Task Execution:

    • Default Threading Behavior: Details how tasks are executed on automatically managed background threads and how to verify the execution thread during debugging.

Additional Resources​

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🔵 Tasks in Swift Explained​

This article explores how tasks enable concurrency in Swift, allowing asynchronous operations using async/await. Tasks simplify multi-threading by abstracting verbosity associated with dispatch queues, enabling clean, concise, and efficient code.

Details

URL: 🔗 https://www.avanderlee.com/concurrency/tasks/

Authors: Antoine van der Lee

Tags:
swift, tasks, concurrency, async-await, ios-development

Key Points​

  • Tasks Overview: Introduced in WWDC 2021, tasks create a concurrent environment from non-concurrent methods.
  • Execution Characteristics:
    • Tasks run immediately after creation.
    • Support both synchronous and asynchronous operations.
    • Allow error handling and return values.
  • Cancellation: Tasks run regardless of references unless explicitly cancelled, with cancellation checks preventing unnecessary work.
  • Priority Management: Tasks have priorities (low, medium, high), influencing execution order.

Summary of Contents​

  • Creating Tasks: Demonstrates synchronous and asynchronous task creation.
  • Executing Tasks: Explains default immediate execution and task result handling.
  • Cancellation: Discusses cancellation techniques using Task.cancel(), Task.checkCancellation(), and Task.isCancelled.
  • Priority Management: Explains task priority levels and their impact on scheduling.
  • Practical Examples: Covers fetching images asynchronously and handling cancellation.
Read Full Article→