Show objc mail composer without closing view (or relaunching afterward?)

[blowhard]

I'm generating a PDF using jinja in the background, and then want to email that through the iOS email composer after a button press in the UI. The following code works if I call it without the UI, and if I call view.close() first before calling the mail composer function. But otherwise the mail composer seems to close in the background instantly (without an error) and I never see it. I'm trying to do this in fullscreen mode, though it doesn't seem to make a difference.

Alternatively, is there a way to relaunch the view after the composer is dismissed? When I try to do so it says the view is already being presented even though I've called close().

Call from script:

show_mail_sheet('me@you.com', 'Test', [reference to PDF], 'text/pdf')

function:

# - (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error
def mailComposeController_didFinishWithResult_error_(_self, _cmd, controller, result, error):
    print('Mail composer finished')
    # Wrap the controller parameter in an `ObjCInstance`, so we can send messages:
    mail_vc = ObjCInstance(controller)
    # Set delegate to nil, and release its memory:
    mail_vc.setMailComposeDelegate_(None)
    ObjCInstance(_self).release()
    # Dismiss the sheet:
    mail_vc.dismissViewControllerAnimated_completion_(True, None)

methods = [mailComposeController_didFinishWithResult_error_]
protocols = ['MFMailComposeViewControllerDelegate']
MyMailComposeDelegate = create_objc_class('MyMailComposeDelegate', NSObject, methods=methods, protocols=protocols)

@on_main_thread
def show_mail_sheet(recipient, subject, filename, mimetype):
    print("Showing mail sheet")
    load_framework('MessageUI')
    MFMailComposeViewController = ObjCClass('MFMailComposeViewController')
    mail_composer = MFMailComposeViewController.alloc().init().autorelease()
    # Use our new delegate class:
    delegate = MyMailComposeDelegate.alloc().init()
    mail_composer.setMailComposeDelegate_(delegate)
    mail_composer.setToRecipients([recipient])
    mail_composer.setSubject(subject)
    filepath = os.path.join(os.getcwd(), filename)
    mail_composer.addAttachmentData_mimeType_fileName_(NSData.dataWithContentsOfFile_(filepath), mimetype, filename )
    # Present the mail sheet:
    root_vc = UIApplication.sharedApplication().keyWindow().rootViewController()
    root_vc.presentViewController_animated_completion_(mail_composer, True, None)```

[cvp]

@blowhard could you check if after your problem a file _objc_exception.txt has been created or updated in the root of Pythonista. Perhaps is your problem coming from an Objectivec exception. If yes, you can post its content.

I think about a thread problem

[mikael]

@blowhard, if I understand correctly what you are trying to do, open the composer as a modal subcontroller to your ui.View, instead of a main controller:

vc = SUIViewController.viewControllerForView_(
    your_view.objc_instance)
vc.presentModalViewController_animated_(mail_composer, True)

[blowhard]

@mikael said:

vc = SUIViewController.viewControllerForView_(
your_view.objc_instance)
vc.presentModalViewController_animated_(mail_composer, True)

This worked perfectly. Thanks!