Learn how to Push/Present new UIViewController
Learn how to use popover view controller.
Learn how to use Completion handlers and Blocks.
How to use `UIRefreshControl` in Swift.
– How to use UICollectionView in iOS Swift. – How to use custom collection view cell. – Identify which button of cell is tapped. – full code is here https://github.com/J3Patel/collection-view-demo-iOS-swift.git
– Used Model to save the states of switches – Identify which switch is tapped by user – Used custom UITableViewCell GITHUB: https://github.com/J3Patel/TableView-Demo-with-saving-switches-states