In Delphi/FMX there is no ARC for the Objective-C objects represented by the import wrapper classes and interfaces.
When dealing with Objective-C objects you’ll have to call retain and
release yourself at the correct points. Allocating a new Objective-C
object will initialize its reference count to 1 and calling release
will drop it to 0 thus destroying it.
http://ridingdelphi.blogspot.de/2014/01/the-quest-to-migrate-ios-squarecam-app_3169.html
For example, i want to create a UILabel dynamically. According to the reference above, my code should be look like this (I’m assuming that I have chosen the positions for retail and release correctly):
procedure TForm1.Button1Click(Sender: TObject);
var
lbl: UILabel;
begin
lbl := TUILabel.Wrap(TUILabel.alloc.init);
lbl.retain;
…
lbl.release;
end;
It does not work. What is the right way to release wrapped Objective-C objects in Delphi/FMX?
With “It doesn’t works” I mean that the UILabel is not released as expected ans still allocates the memory. I found this with the help of the Xcode Allocation Instrument.
