Figuring out which icon was clicked on in UIActivityViewController

Question

Using the "Social" Framework, when presenting the modal UIActivityViewController that displays all the usual social-media icons, is there a way to find out exactly which icon the user clicked on? Meaning, if they chose Twitter, Facebook, Mail, Message, etc?

I was expecting to possibly see some delegate methods for this class in the Docs but I don't see anything.

Anybody got any ideas?

Answer 1

The UIActivityViewController has the completionHandler property. Implement this handler to be notified.

UIActivityViewController *avc = ...;
avc.completionHandler = ^(NSString *activityType, BOOL completed) {
    if (completed) {
        NSLog(@"The selected activity was %@", activityType);
    }
};

Answer 2

Swift 3

The typealias UIActivityViewControllerCompletionWithItemsHandler in Swift 3 changed to

public typealias UIActivityViewControllerCompletionWithItemsHandler = (UIActivityType?, Bool, [Any]?, Error?) -> Swift.Void

You can use the completionWithItemsHandler like this.

activityViewController.completionWithItemsHandler = {(activityType: UIActivityType?, completed: Bool, returnedItems:[Any]?, error: Error?) in
    //Do whatever you want
}

Answer 3

completionHandler is deprecated. Use completionWithItemsHandler.

activityController.completionWithItemsHandler = ^(NSString *activityType, BOOL completed, NSArray *returnedItems, NSError *activityError) {
    NSLog(@"completionWithItemsHandler, activityType: %@, completed: %d, returnedItems: %@, activityError: %@", activityType, completed, returnedItems, activityError);
};

Answer 4

Based on this SO answer: https://stackoverflow.com/a/34581940/2177085

This also include to check is user shared through WhatsApp or Gmail. You can print activityType to add other types.

let activityViewController = UIActivityViewController(activityItems: [finalMsg as NSString], applicationActivities: nil)
self.presentViewController(activityViewController, animated: true, completion: nil)

activityViewController.completionWithItemsHandler = {(activityType, completed:Bool, returnedItems:[AnyObject]?, error: NSError?) in

// Return if cancelled
if (!completed) {
    print("user clicked cancel")
    return
}

if activityType == UIActivityTypeMail {
    print("share throgh mail")
}
else if activityType == UIActivityTypeMessage {
    print("share trhought Message IOS")
}
else if activityType == UIActivityTypePostToTwitter {
    print("posted to twitter")
}
else if activityType == UIActivityTypePostToFacebook {
    print("posted to facebook")
}
else if activityType == UIActivityTypeCopyToPasteboard {
    print("copied to clipboard")
}
else if activityType! == "net.whatsapp.WhatsApp.ShareExtension" {
    print("activity type is whatsapp")
}
else if activityType! == "com.google.Gmail.ShareExtension" {
    print("activity type is Gmail")
}
else {
    // You can add this activity type after getting the value from console for other apps.
    print("activity type is: \(activityType)")
}
}