ios - Setting height for UITableViewCell with UIWebView inside -

i have uiwebview inside custom uitableviewcells. problem don't quite know how dynamically size uitableviewcell cells since webview inside cell needs render before can know webview's height.

my proposed solution follows:

customcell.m conforms uiwebviewdelegate , returns own height delegate method after webview inside has finished loading.

- (void)webviewdidfinishload:(uiwebview *)webview {     cgfloat height = [[webview stringbyevaluatingjavascriptfromstring:@"document.body.scrollheight"] floatvalue];     [self.contentwebview setframeheight:height];     [self.delegate celldidfinishloadingwithcell:self withheight:height]; } 

then tableviewcontroller.m conforms cell's delegate, , redraws doing like:

- (cgfloat)tableview:(uitableview *)tableview heightforrowatindexpath:(nonnull nsindexpath *)indexpath {     return [self.heights[[nsstring stringwithformat:@"%i%i",indexpath.section,indexpath.row]] floatvalue]; }  - (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {     uiwebviewcell *cell = [tableview dequeuereusablecellwithidentifier:@"webview-cell" forindexpath:indexpath];     mydata *d = self.data[indexpath.section];     [cell setupcellfordata:d];     [cell setdelegate:self];     return cell; }  - (void)celldidfinishloadingwithcell:(lessontableviewcell *)cell withheight:(cgfloat)height {     nsindexpath *indexpath = [self.tableview indexpathforcell:cell];     nsstring *key = [nsstring stringwithformat:@"%i%i",indexpath.section,indexpath.row];     if (!self.heights[key]) {         [self.heights setobject:[nsnumber numberwithfloat:height] forkey:key];     }     [self.tableview beginupdates];     [self.tableview endupdates]; } 

some cells seem correct height, many of them end having height of 0...

remove :

[self.tableview beginupdates]; [self.tableview endupdates]; 

add :

[self.tableview reloaddata]; 

apple documents:
beginupdates
reloaddata

https://stackoverflow.com/a/8174094/2530660