UIActivityViewControllerCompletionHandler How to?

Question

I am trying to use the UIActivityViewControllerCompletionHandler , but i dont quite get how..

I want to detect when the user finishes or dismisses this view controller (UIActivityViewController).

Anyone knows how?

score 70 · Answer 1 · answered Oct 02 '12 at 01:21

70

Here's how you show a sharing dialog and set its completion handler

NSArray *imageArray = [NSArray arrayWithObject:shareImage];

UIActivityViewController *sharing = [[UIActivityViewController alloc] initWithActivityItems:imageArray applicationActivities:nil];

[sharing setCompletionHandler:^(NSString *activityType, BOOL completed) {
    NSLog(@"completed dialog - activity: %@ - finished flag: %d", activityType, completed);
}];

[self presentViewController:sharing animated:YES completion:nil];

answered Oct 02 '12 at 01:21

gchbib

1,955
1
17
23

2

Hey dude, how can I know whether I have post successfully? Because even the post is failed indeed, the "completed" remains also Yes/1 – Paradise Sep 11 '13 at 07:25
2

This approach is deprecated in iOS8. – Praxiteles Jul 22 '15 at 06:26

score 25 · Answer 2 · answered Feb 13 '15 at 14:03

With iOS 8 completionHandler is deprecated, so you will want to provide alternative completionWithItemsHandler. It also allows to handle if extension modified data you set (say Photo extension). See Documentation

    UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:@[text, URL, image] applicationActivities:nil];
    activityViewController.excludedActivityTypes = @[UIActivityTypePrint, UIActivityTypeCopyToPasteboard, UIActivityTypeAssignToContact, UIActivityTypeAirDrop, UIActivityTypeAddToReadingList];

    // check if new API supported
    if ([activityViewController respondsToSelector:@selector(completionWithItemsHandler)]) {
        activityViewController.completionWithItemsHandler = ^(NSString *activityType, BOOL completed, NSArray *returnedItems, NSError *activityError) {
            // When completed flag is YES, user performed specific activity
        };
    } else {
        activityViewController.completionHandler = ^(NSString *activityType, BOOL completed) {
            // When completed flag is YES, user performed specific activity
        };
    }

score 19 · Accepted Answer · answered Sep 23 '12 at 18:08

19

typedef void (^UIActivityViewControllerCompletionHandler)
    (NSString *activityType, BOOL completed);

The second parameter of the completion handler tells you whether the user dismissed the controller. If they dismissed the controller, completed will be set to NO.

There's more details in the completion handler's documentation.

answered Sep 23 '12 at 18:08

sobri

1,626
15
28

1

Hey dude, how can I know whether I have post successfully? Because even the post is failed indeed, the "completed" remains also Yes/1 – Paradise – Paradise Sep 11 '13 at 07:26

score 1 · Answer 4 · answered May 16 '19 at 19:42

Swift 5:

func showShareOf(url: URL, title: String) {
    let shareItems: [Any] = ["\(title)\n", url]
    let activityVC = UIActivityViewController(activityItems: shareItems, applicationActivities: nil)
    activityVC.completionWithItemsHandler = doneSharingHandler
    self.present(activityVC, animated: true, completion: nil)
}

@objc func doneSharingHandler(activityType: UIActivity.ActivityType?, completed: Bool, _ returnedItems: [Any]?, error: Error?) {
    if (!completed) { return }
    // If here, log which activity occurred
    print("Shared activity: \(activityType)")
}

score 0 · Answer 5 · answered Sep 29 '22 at 20:22

You can use completionWithItemsHandler

Here is the code in Objective-C. Please translate it into Swift accordingly.

UIActivityViewController *activityVC = [[UIActivityViewController alloc] initWithActivityItems:@[text] applicationActivities:nil];

activityVC.completionWithItemsHandler  = ^(NSString *activityType, BOOL completed, NSArray *returnedItems, NSError *error){
          
   if (completed) {
             
        NSLog(@"Shared by activity %@", activityType);

    } else {
        NSLog(@"ShareSheet was closed");
    }
   
    if (error) {
        NSLog(@"An Error Occured: %@, %@", error.localizedDescription, error.localizedFailureReason);
             
    }
};

score -1 · Answer 6 · answered Sep 06 '15 at 04:27

For Swift, this one works for me...

    // Configure UIActivityViewController
    let activityViewController = UIActivityViewController(activityItems: objectsToShare, applicationActivities: nil)
    activityViewController.excludedActivityTypes = [UIActivityTypeAirDrop,
        UIActivityTypeAddToReadingList,
        UIActivityTypeAssignToContact,
        UIActivityTypePrint,
        UIActivityTypeCopyToPasteboard]

    // Show UIActivityViewController
    presentViewController(activityViewController, animated: true, completion: nil)

    // Define completion handler
    activityViewController.completionWithItemsHandler = doneSharingHandler

...

func doneSharingHandler(activityType: String!, completed: Bool, returnedItems: [AnyObject]!, error: NSError!) {

    // Return if cancelled
    if (!completed) {
        return
    }
    // If here, log which activity occurred
    println("Shared video activity: \(activityType)")
}

could u add a doneSharingHandler as a block declaration? – Vyachaslav Gerchicov Dec 05 '16 at 09:49 — Vyachaslav Gerchicov, Dec 05 '16 at 09:49

UIActivityViewControllerCompletionHandler How to?

6 Answers6

You can use completionWithItemsHandler

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