It’s a little different for protocols. Look at “Associated Types” in Apple’s documentation.
This is how you use it in your example
protocol ApiMapperProtocol {
associatedtype T
associatedtype U
func MapFromSource(_:T) -> U
}
class UserMapper: NSObject, ApiMapperProtocol {
typealias T = NSDictionary
typealias U = UserModel
func MapFromSource(_ data:NSDictionary) -> UserModel {
var user = UserModel()
var accountsData:NSArray = data["Accounts"] as NSArray
// For Swift 1.2, you need this line instead
// var accountsData:NSArray = data["Accounts"] as! NSArray
return user
}
}