You have a rudimentary understanding of table views, image views, and navigation controllers, so let’s put them together: your challenge is to create an app that lists various world flags in a table view. When one of them is tapped, slide in a detail view controller that contains an image view, showing the same flag full size. On the detail view controller, add an action button that lets the user share the flag picture and country name using
To solve this challenge you’ll need to draw on skills you learned in tutorials 1, 2, and 3:
ViewController class so that builds on
UIActivityViewController to share your flag.
As always, I’m going to provide some hints below, but I suggest you try to complete as much of the challenge as you can before reading them.
let fm = FileManager.default, then
let path = Bundle.main.resourcePath!, then finally
let items = try! fm.contentsOfDirectory(atPath: path).
ViewController build on
UITableViewController, you’ll need to override its
tableView.dequeueReusableCell(withIdentifier: "Country", for: indexPath).
didSelectItemAt method is responsible for taking some action when the user taps a row.
UIImageView to load it into. The former should be modified from
didSelectItemAt; the latter should be modified in the
viewDidLoad() method of your detail view controller.
Bonus tip: try setting the
imageView property of the table view cell. Yes, they have one. And yes, it automatically places an image right there in the table view cell – it makes a great preview for every country.
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