ios - Why does reloadRowsAtIndexPaths doesn't reload a cell's UILabel alpha value, but reloadData does? -

when select row, method gets called:

- (void)tableview:(uitableview *)tableview didselectrowatindexpath:(nsindexpath *)indexpath {      [_historyentrytableview reloadrowsatindexpaths:[nsarray arraywithobject:indexpath]                                   withrowanimation:uitableviewrowanimationfade]; } 

and cellforrowatindexpath, i'm dynamically setting alpha value uilabel.

- (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {      static nsstring *cell = @"standardcell";      twhistoryviewstandardcell *cell =     (twhistoryviewstandardcell *)[tableview dequeuereusablecellwithidentifier:cell];      if (cell == nil) {         cell = (twhistoryviewstandardcell *)[[[nsbundle mainbundle] loadnibnamed:@"historyviewstandardcell" owner:self options:nil] objectatindex:0];     }      //...      if (currentpick == pickdatefrom) {         cell.hourslabel.alpha = 1.0;     } else {         cell.hourslabel.alpha = 0.7;     }      //...  } 

if didselectrowatindexpath method call reloaddata on table view, table shows updated cells, expected alpha value. reloadrowsatindexpath no effect whatsoever.

any reason why might happening?

edit:

"hammer fixed" calling reloaddata after reloadrowsatindexpath:

[_historyentrytableview reloadrowsatindexpaths:[nsarray arraywithobject:indexpath]                               withrowanimation:uitableviewrowanimationfade]; [_historyentrytableview reloaddata];  

it's not realy answer question, now.

does know if there's in cell must called re-render alpha value? it's alpha value of uilabel, because text change correctly.

thank you!