Swift messages dispatch

IOS_Swift_Message_Dispatch.swift

import Foundation

class CustomClass: NSObject {
    @objc func getValue(_ arg: Int) {
        print("val is: 100")
    }
    
    @objc func getValue2() {
        print("val is: 2")
    }
}

private func executeAction(className: String, methodName: String, arg: Any?) {
    let cla: AnyClass? = NSClassFromString(className)
    if let cla = cla as? NSObject.Type {
        let selector: Selector = Selector(methodName)
        let instance = cla.init()
        if (instance.responds(to: selector)) {
            if let arg = arg {
                instance.perform(selector, with: arg)
            } else {
                instance.perform(selector)
            }
        } else {
            print("method not found")
        }
    } else {
        print("class not found")
    }
}
    
executeAction(className: "YourProjectName.CustomClass", methodName: "getValue:", arg: 100)
executeAction(className: "YourProjectName.CustomClass", methodName: "getValue2", arg: nil)