ios - UITableViewCell Not Autoresizing in "Live" Search -

little bit of background

i in process of making search feature announcements in app. load initial announcements in uitableview custom cell display. achieve dynamic cell size in viewdidload() method of announcementtableviewcontroller class use autoresizing technique:

tableview.estimatedrowheight = tableview.rowheight tableview.rowheight = uitableviewautomaticdimension 

that works displaying cells various heights. calling tableview.reloaddata() when refreshing cells' data works great.

i have different uitableview displays blank tableview , uisearchbar header. implement uisearchbardelegate method searchbar(_:textdidchange:), perform search filter logic , append filtered announcements filteredannouncements array.

i call tableview.reloaddata() method in didset filteredannouncements.

the issue

when type in search bar cells not automatically resize themselves, in fact default height. have title , body each announcement, body gets cut off.

what i've tried

the uitableautomaticdimension trick doesn't seem work live search (that updates after each keypress). i've tried calling tableview.setneedsdisplay(), tableview.setneedsupdatedconstraints, tableview.setneedslayout() in didset observer of filteredannouncements array.

i've tried override didmovetosubview() method in custom cell's class call different methods named above per old stackoverflow question, no luck.

edit: answered own question below

calling beginupdates , endupdates on table force recalculate heights rows.

i think you'll find whole experience easier (and more pleasing users!) if implement row insertion/deletion methods of uitableview instead of using reloaddata.