How to update UIViewController programmatically?

Question

I have a ViewController in which the user selects a map (custom UIButton) from a UIScrollView. I intercepted a touch event, selected a map and identified it, and then deleted it from the data source, but it still exists in UISubView. How can I get rid of it? Updating the view should show that it has been removed from the view. How to do it?

Answer 1

You can do this in one of two places:

• in your view manager
• directly in view

you need to call the setNeedsDisplay function

• viewController, [yourViewOutletVariable/viewParameter setNeedsDisplay];
• , [self setNeedsDisplay];

,

Answer 2

, .

, ?

ReactiveCocoa.

Answer 3

:

UIView *v = ...;
[v removeFromSuperview];

setNeedsDisplay removeFromSuperview.

Answer 4

"UIViewController", :

[self viewDidLoad];