iOS Development: Threading and Grand Central Dispatch

Get up and running with Grand Central Dispatch. Learn how to put code or tasks on threads to speed up your iOS app and make it more responsive to users.

Introduction

• iOS development: Grand Central Dispatch
• What you should know

1. Evolution of GCD

• Traditional threading
• What is Grand Central Dispatch?
• Adding multithreading
• Challenge: Optimizing the collection view
• Solution: Optimizing the collection view

2. Working with Queues

• What are queues?
• The main queue
• The global queue
• Developing a custom queue
• Challenge: Download images in a collection view
• Solution: Download images in a collection view

3. Asychronous vs. Synchronous Execution

• What are async and sync programming?
• Dispatching asynchronously
• Dispatching synchronously
• Challenge: Load images in a collection view
• Solution: Load images in a collection view

4. Concurrency vs. Parallelism

• What are deadlocks?
• Avoiding deadlocks using dispatch_async
• Challenge: Resolving a deadlock
• Solution: Resolving a deadlock

Conclusion

• Digging deeper into GCD's API