Delphi/IOS How to correctly use imp_implementationWithBlock?

Question

In IOS I have this function :

- (void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))completionHandler __IOS_AVAILABLE(10.0) __TVOS_AVAILABLE(10.0) __WATCHOS_AVAILABLE(3.0);

my particular problem is this param :

withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))completionHandler

i translate it like

procedure userNotificationCenterWillPresentNotificationWithCompletionHandler(center: UNUserNotificationCenter;
                                                                             willPresentNotification: UNNotification;
                                                                             withCompletionHandler: pointer);
var aImp: procedure(self: pointer; _cmd: pointer; const options); cdecl;
    aOptions: UNNotificationPresentationOptions;
begin

  @aImp := imp_implementationWithBlock(withCompletionHandler);
  aOptions := UNNotificationPresentationOptionAlert;
  aImp(self, nil, aOptions);
  imp_removeBlock(@aImp);

end;

but it's not work ! i thing i do something wrong when passing the options

i declare the imp function like

var aImp: procedure(self: pointer; _cmd: pointer; const options); cdecl;
aOptions := UNNotificationPresentationOptionAlert;

but maybe not the good way, i try to declare it like

var aImp: procedure(self: pointer; _cmd: pointer; options: pointer); cdecl;
aOptions := pointer(UNNotificationPresentationOptionAlert);

or like

var aImp: procedure(self: pointer; _cmd: pointer; options: nsuinteger); cdecl;
aOptions := UNNotificationPresentationOptionAlert;

none work :( any idea(s) of what I miss ?

zeus · Accepted Answer · 2017-05-14 10:14:27Z

1

a little crazy how i found it (trying all the possible and impossible combinations) but i found it !

var aImp: procedure(options: nsuinteger); cdecl;

yes simple like this ...

answered May 14, 2017 at 10:14

zeus

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1 Comment

Dave Nottage Over a year ago

This seems to be in contradiction to Apple's documentation: developer.apple.com/reference/objectivec/…, but I'm glad you found the answer!

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