Custom UIActivity in Swift 3

CustomActivity.swift

import UIKit

class CustomActivity: UIActivity {
    var actName = ""
    var actImage: UIImage?
    var customActionWhenTapped:( ()-> Void)!
    
    init(title: String, image: UIImage, performAction: @escaping (() -> ()) ) {
        self.actName = title
        self.actImage = image
        self.customActionWhenTapped = performAction
        super.init()
    }

    override class var activityCategory: UIActivityCategory {
        return .action
    }
    
    override var activityType: UIActivityType? {
        guard let bundleId = Bundle.main.bundleIdentifier else {return nil}
        return UIActivityType(rawValue: bundleId + "\(self.classForCoder)")
    }
    
    override var activityTitle: String? {
        return actName
    }

    override var activityImage: UIImage? {
        return actImage
    }

    override func canPerform(withActivityItems activityItems: [Any]) -> Bool {
        return true
    }
    
    override func prepare(withActivityItems activityItems: [Any]) {
        //
    }

    override func perform() {
        customActionWhenTapped()
        activityDidFinish(true)
    }
}

Now you can init custom UIActivity with name/image/closure, from any place