Open Radar

 
Summary:
When MFMailComposeViewController is presented by a UIActivityViewController then dismissed using dismissViewControllerAnimated:completion:, neither -[UIActivity activityDidFinish:] nor UIActivityViewController's completion block gets called, and there is no way to do so after dismissing it because there is no way to get a handle to the UIMailActivity.

Steps to Reproduce:
Execute this code in a view controller. When the share sheet appears, choose Mail to open the email composer.

- (IBAction)foo
{
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        [self dismissViewControllerAnimated:YES completion:nil];
    });
    
    UIActivityViewController *c = [[UIActivityViewController alloc] initWithActivityItems:@[ @"foo" ] applicationActivities:nil];
    c.completionWithItemsHandler = ^(NSString *activityType, BOOL completed, NSArray *returnedItems, NSError *activityError) {
        NSLog(@"completion");
    };
    [self presentViewController:c animated:YES completion:nil];
}

Expected Results:
After 5 seconds, the mail composer is programmatically dismissed. -[UIActivity activityDidFinish:NO] is called, and the completion handler is executed.

Actual Results:
After 5 seconds, the mail composer is programmatically dismissed. -[UIActivity activityDidFinish:NO] is not called, and the completion handler is not executed.

Version:
Tested on iOS 7.1.1, iOS 8.1, iOS 8.4

Notes:
This is probably reproducible on any iOS >= 6.0.

Configuration:
Tested on iPhone 4S, 5 devices and 5S simulator

Attachments: