Grand Central Dispatch (GCD)
About this Course
Many times your apps need to run lengthy operations in the background, like downloading data, but you don't want these operations to interfere with your UI.
Apple's GCD (long form: Grand Central Dispatch) framework allows you to create asynchronous apps for iOS, ensuring smooth a smooth user experience in situations like the one mentioned above.
Learn how to prevent background operations from interfering with an app’s UI by implementing …
Grand Central Dispatch (GCD)
About this Course
Many times your apps need to run lengthy operations in the background, like downloading data, but you don't want these operations to interfere with your UI.
Apple's GCD (long form: Grand Central Dispatch) framework allows you to create asynchronous apps for iOS, ensuring smooth a smooth user experience in situations like the one mentioned above.
Learn how to prevent background operations from interfering with an app’s UI by implementing Apple’s GCD framework.
[
Almsot all Apps consume data from web services, and therefore must use background threads for these lengthy operations.
,Even though we provide a black box solution for concurrency in the iOS Networking with Swift course, it is important that you understand how concurrency works in iOS.
,This knowledge is vital to deliver Apps that won’t be rejected from the App Store and also provide a great user experience.
,On top of that, GCD is a frequent topic in iOS job interviews.
]
lesson 1
Closures Reloaded
Closures in Swift
Properties of closures that we bypassed in our Swift Syntax course
lesson 2
Grand Central Dispatch
Apple’s open source library Grand Central Dispatch
How GCD allows you to send tasks to the background and (equally important) to the foreground
How and what you can send to the background and what must always run in the foreground
lesson 3
Sample App
Create a simple App that downloads huge images (the easiest way to block the UI)
Send this network lengthy task to the background in 2 different ways
Run closures in the background
Design methods that take a completion closure
