I created a small extension to display a dialog for user input here: https://github.com/RudolfVonKrugstein/NativeDialogs
I did not test it very much yet. I hope someone else but me finds this usefull :-).
Now, but I have little experience in ios programming. And I am told that one as to do some sort of manual "garbag collecting"in ios. So now I am worried, that I did not do it correctly and I am creating memory leaks. How can I test this?