['gaming', 'identity', 'boundaries', 'sustainability', 'cooking']
Necessito una funció en Swift que rebi una data en format "dd/MM/yyyy" i retorni el dia de la setmana corresponent (dilluns, dimarts, etc.).
```swift
import Foundation

func diaDeLaSetmana(per dataString: String) -> String? {
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "dd/MM/yyyy"
    guard let date = dateFormatter.date(from: dataString) else { return nil }
    let calendar = Calendar.current
    let dayOfWeek = calendar.component(.weekday, from: date)
    let weekdays = ["Diumenge", "Dilluns", "Dimarts", "Dimecres", "Dijous", "Divendres", "Dissabte"]
    return weekdays[dayOfWeek - 1]
}
```