在Swift中将类作为函数参数

Question

In my app there are many classes for different ViewControllers. I am searching way to give class name as function parameter so i can use it in function.

Example

func myFunc (var1: String, var2 : Int, var3 : myClass) {
 var example = myClass();
 example.name = var1;
 example.age = var2;
}

i saw this thread Class conforming to protocol as function parameter in Swift but i didn't understand how can i solve my problem with it.

Answer 1

You can do this without the need to pass an instance of your view controller:

import Cocoa

protocol MyViewControllerType : class {
    var name : String { get set }
    var age : Int { get set }
}

class FirstViewController : NSViewController, MyViewControllerType {
    var name = ""
    var age = 0
}

class SecondViewController : NSViewController, MyViewControllerType {
    var name = ""
    var age = 0
}

func myFunc<VC : NSViewController where VC : MyViewControllerType>(viewControllerType: VC.Type, name: String, age: Int) -> VC {
    let viewController = VC()
    viewController.name = name
    viewController.age = age
    return viewController
}

let first = myFunc(FirstViewController.self, name: "Bob", age: 20)
let second = myFunc(SecondViewController.self, name: "Paul", age: 30)