share-text-and-image-whatsapp.swift

import UIKit

class RootViewController: UIViewController {
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        
        let text = "Cute cat"
        let image = UIImage(named: "cat.jpg")!
        
        // Note: you can't wrap the text and image into a single "TextImage" object and selectively return both or one as UIActivityItemSource doesn't like holding arrays
        let activityViewController = UIActivityViewController(activityItems: [image, OptionalTextActivityItemSource(text: text)], applicationActivities: nil)
        navigationController?.present(activityViewController, animated: true, completion: nil)
    }
}

class OptionalTextActivityItemSource: NSObject, UIActivityItemSource {
    let text: String
    
    init(text: String) {
        self.text = text
    }
    
    func activityViewControllerPlaceholderItem(_ activityViewController: UIActivityViewController) -> Any {
        return text
    }
    
    func activityViewController(_ activityViewController: UIActivityViewController, itemForActivityType activityType: UIActivity.ActivityType?) -> Any? {
        if activityType?.rawValue == "net.whatsapp.WhatsApp.ShareExtension" {
            return nil
        } else {
            return text
        }
    }
}