Dynamically create instance based on type in Swift

DynamicInit.swift

protocol Initializable {
  init()
}

class A : Initializable {
  var content:String
  
  required init() {
    content = "TestContent"
  }
}

func createInstance<T where T:Initializable>(typeThing:T.Type) -> T {
  return typeThing()
}

let a = createInstance(A)

Swift 5.x

protocol Initializable {
    init()
}

class A : Initializable {
    var content:String
    
    required init() {
        content = "TestContent"
    }
}

func createInstance<T>(typeThing:T.Type) -> T where T:Initializable {
    return typeThing.init()
}

let a = createInstance(typeThing: A.self)

Do you know how we can do this in objective-c

Do you know how we can do this in objective-c

id instance = [[NSClassFromString(@"ClassName") alloc] init];

https://developer.apple.com/documentation/foundation/1395135-nsclassfromstring

Remember to manage you memory as needed! There are other ways to create an instance but this is a common one.