Thanks for the answer."Seems the docs of SwiftUI are far from complete and you may need to know many parts of UIKit features."That was my impression too. Apple had become sloppy :-(Your link helped!
fritzfrompulheim
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Moin Jim,thanks for answer!I really only wanted a description whatg you gave in the first paragraph.The very problem is:"Seems the docs of SwiftUI are far from complete and you may need to know many parts of UIKit features."
Moin Claude31,thanks for the answer !
Moin Claude31,your answer was correct.but:I am an old man. So my time is some sort of precious...........I am tired of searching for information which should be in place!And not elsewhere in the WWW.so................If Apple would do its job properly I could spend more time writing my code. :-)