ios - UITableViewCell disclosure indicator disappears on scrolling -

i have custom tableviewcell subviews defined in prototype cell in storyboard. in storyboard set accessory disclosure indicator, when scrolling (when cells reused) indicator disappears.

i tried set in code:

- (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {     ...     cell.accessorytype = uitableviewcellaccessorydisclosureindicator; 

it did not work well. found working solution, weird solution:

- (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {     ...     cell.accessorytype = uitableviewcellaccessorynone;     cell.accessorytype = uitableviewcellaccessorydisclosureindicator; 

i don't know why can fix anything, works me. can tell me why or if there other problem/fix?

update:

how reusable cell:

activityweekcell *cell = [tableview dequeuereusablecellwithidentifier:@"cell" forindexpath:indexpath]; 

i tried:

activityweekcell *cell = [tableview dequeuereusablecellwithidentifier:@"cell" forindexpath:indexpath];  if (cell == nil) {     cell = [[activityweekcell alloc] initwithstyle:uitableviewcellstyledefault reuseidentifier:@"cell"];     cell.accessorytype = uitableviewcellaccessorydisclosureindicator;  } 

try use variant:

activityweekcell *cell = [tableview dequeuereusablecellwithidentifier:@"cell" forindexpath:indexpath];  if (cell == nil) {     cell = [[activityweekcell alloc] initwithstyle:uitableviewcellstyledefault reuseidentifier:@"cell"]; } cell.accessorytype = uitableviewcellaccessorydisclosureindicator;