UITableView Cell 높이값 저장

NSMutableDictionary *cellHeightsDictionary;

 

cellHeightsDictionary = @{}.mutableCopy;

 

// 보여지고 있는 Cell의 높이값을 저장한다.

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {

    [cellHeightsDictionary setObject:@(cell.frame.size.height) forKey:indexPath];

}

 

// 저장한 높이값으로 설정한다.

- (CGFloat)tableView:(UITableView *)tableView estimatedHeightForRowAtIndexPath:(NSIndexPath *)indexPath {

    NSNumber *height = [cellHeightsDictionary objectForKey:indexPath];

    if (height) return height.doubleValue;

    return UITableViewAutomaticDimension;

}