UITableViewCell计算行高

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UITableViewCell *cell = [self tableView:tableView cellForRowAtIndexPath:indexPath];
    UILabel *tempLable=(UILabel *)[cell viewWithTag:1];
    UIImageView *tempImage=(UIImageView *)[cell viewWithTag:2];
    CGFloat lableHeight=tempLable.frame.size.height;
    CGFloat imageheight=tempImage.frame.size.height;
    if(lableHeight>imageheight)
        return lableHeight;
    else
        return imageheight;