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

Answer 1

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
        };
    }