UIlabel() tap to expand text - ios

Question

So I am building a map that provides factual data on a variety of points located in Washington DC. The data is getting pulled from a geojson and listed as 20 or so points. When you click on the point, there is a popup that occurs that shows a truncated version of the text, only 10 lines. However some of the text is really long, 200 lines+. I want to develop a way to expand the text, or have a scrollable bar. Basically anything to have the option to open up the text. Adding an image to show what it looks like.
You can see an image here: https://i.stack.imgur.com/yeeBa.jpg
Here is the code I am using.
The data is getting called in the ViewController.swift using this
func loadInitialData() {
// 1
guard let fileName = Bundle.main.path(forResource: "PublicArt4", ofType: "json")
else { return }
let optionalData = try? Data(contentsOf: URL(fileURLWithPath: fileName))
guard
let data = optionalData,
// 2
let json = try? JSONSerialization.jsonObject(with: data),
// 3
let dictionary = json as? [String: Any],
// 4
let works = dictionary["data"] as? [[Any]]
else { return }
// 5
let validWorks = works.compactMap { Artwork(json: $0) }
artworks.append(contentsOf: validWorks)
}
}
The artworkViews.swift displays the label formatting
let detailLabel = UILabel()
detailLabel.text = artwork.locationlink
detailLabel.text = artwork.subtitle
detailCalloutAccessoryView = detailLabel
detailLabel.font = UIFont(name: "Heiti TC", size: 12)
detailLabel.numberOfLines = 10
//detailLabel.adjustsFontSizeToFitWidth = true
// detailLabel.minimumScaleFactor = 0.5
// detailLabel.baselineAdjustment = .alignCenters
// detailLabel.textAlignment = .left
The geojson is formatted like this
{"data" : [ [
1,
"Washington Monument",
"Click here to learn more",
"Madison Dr NW & 15th St NW",
"Washington",
"DC",
20001,
"38.89013",
"-77.033031",
"www.google.com Welcome to the Washington Monument,",
"Mural",
"Some text, not sure what it is",
" "
],...
The Artwork.swift pulls the data in such a way
class Artwork: NSObject, MKAnnotation {
let title: String?
let locationName: String
let locationURL: String
let discipline: String
let coordinate: CLLocationCoordinate2D
init(title: String, locationName: String, locationURL: String, discipline: String, coordinate: CLLocationCoordinate2D) {
self.title = title
self.locationName = locationName
self.locationURL = locationURL
self.discipline = discipline
self.coordinate = coordinate
super.init()
}
var subtitle: String? {
return locationName
}
var locationlink: String? {
return locationURL
}
init?(json: [Any]) {
// 1
if let title = json[2] as? String {
self.title = title
} else {
self.title = "No Title"
}
// json[11] is the long description
//self.locationName = json[11] as! String
// json[12] is the short location string
self.locationName = json[9] as! String
self.discipline = json[10] as! String
self.locationURL = json[3] as! String
// 2
if let latitude = Double(json[7] as! String),
let longitude = Double(json[8] as! String) {
self.coordinate = CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
} else {
self.coordinate = CLLocationCoordinate2D()
}
}
// pinTintColor for disciplines: Sculpture, Plaque, Mural, Monument, other
var markerTintColor: UIColor {
switch discipline {
case "Monument":
return .red
case "Mural":
return .cyan
case "Plaque":
return .blue
case "Sculpture":
return .purple
default:
return .green
}
}
var imageName: String? {
if discipline == "Mural" { return "Flag" }
return "Flag"
}
// Annotation right callout accessory opens this mapItem in Maps app
func mapItem() -> MKMapItem {
let addressDict = [CNPostalAddressStreetKey: subtitle!]
let placemark = MKPlacemark(coordinate: coordinate, addressDictionary: addressDict)
let mapItem = MKMapItem(placemark: placemark)
mapItem.name = title
return mapItem
}
}
The one thing I tried was to switch it to a UITextView, but i cant get that to load properly. Mainly because I am not sure how to integrate it into the ViewController.
let detailLabel = UITextView()
detailLabel.text = artwork.locationlink
detailLabel.text = artwork.subtitle
detailLabel.textColor = UIColor.red
detailLabel.selectedTextRange = detailLabel.textRange(from: detailLabel.beginningOfDocument, to: detailLabel.beginningOfDocument)
```