Doevents or force update in iOS

Targets iOS
1

Prior to an intensive bit of code, I would like to

  • make some control become visible, or
  • force a repaint of a canvas, or
  • even change the title of a screen

But so far all my attempts have failed - whatever I change prior to the code section, doesnt (visibly) happen before the code executes.

There is no doevents.
DelayMBS doesnt do it.
somecanvas.refresh doesnt do it.

How can I FORCE a UI update before the code starts?

2

Use a timer with a very short period that runs the intensive code.

3

Maybe Timer.CallLater 0, WeakAddressOf SoneMethodOnMainThread

This is called in the mext main loop cycle.

Thus call your refresh, then your code in SoneMethodOnMainThread thats run right after the call

1 Like
4

Thanks both. Both solutions work

1 Like