Update title/subtitle of current displayed calloutview

[rathahin]

I working on a project that need to group annotation on the map. and when the number of annotation change, I expect to update the title/subtitle on current displayed calloutview.

I use to set title and subtitle, but that is not work. because the attribute of property is copy.

I also try another way, is dismiss and present, it work if I am not navigation map to another region, but if I change it will navigation map back to selected annotation.

I wonder how could I update title/subtitle to current callout view for selecting annotation.

Regards,
Ratha

[nfarina]

Hello - so the callout doesn't officially support changing its content after appearing - because this would require some complex animation to do it "the Apple way".

However you might try presenting the callout view again without animation - it would just update in place and resize itself.

[incanus]

We use such an approach over in https://github.com/mapbox/mapbox-ios-sdk in order to essentially move a callout with a map pan or zoom action. I've played with it for textual changes and had pretty good luck, too.