1 获取UIWebView高度

- (void)webViewDidFinishLoad:(UIWebView *)webView{    // 如果要获取webView高度必须在网页加载完成之后获取    // 方法一    CGFloat height = [self.webView sizeThatFits:CGSizeZero].height; // 方法二 CGFloat height = webView.scrollView.contentSize.height; // 方法三 （不推荐使用，当webView.scalesPageToFit = YES计算的高度不准确） CGFloat height = [[self.webView stringByEvaluatingJavaScriptFromString:@"document.body.offsetHeight"] floatValue]; }

2 UIWebView加载完成后cell高度的更新，使用通知来实现。

TableViewCell.m

- (void)webViewDidFinishLoad:(UIWebView *)webView{    CGSize fittingSize = [self.webView sizeThatFits:CGSizeZero]; self.height = fittingSize.height; self.webView.frame = CGRectMake(0, 0, fittingSize.width, fittingSize.height); // 用通知发送加载完成后的高度 [[NSNotificationCenter defaultCenter] postNotificationName:@"WEBVIEW_HEIGHT" object:self userInfo:nil]; }

ViewController.m

- (void)viewDidLoad{    [super viewDidLoad];    // 用于缓存cell高度    self.heightDic = [[NSMutableDictionary alloc] init]; // 注册加载完成高度的通知 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(noti:) name:@"WEBVIEW_HEIGHT" object:nil]; } - (void)noti:(NSNotification *)sender { TableViewCell *cell = [sender object]; if (![self.heightDic objectForKey:[NSString stringWithFormat:@"%ld",cell.tag]]||[[self.heightDic objectForKey:[NSString stringWithFormat:@"%ld",cell.tag]] floatValue] != cell.height) { [self.heightDic setObject:[NSNumber numberWithFloat:cell.height] forKey:[NSString stringWithFormat:@"%ld",cell.tag]]; [self.tableView reloadRowsAtIndexPaths:@[[NSIndexPath indexPathForRow:cell.tag inSection:0]] withRowAnimation:UITableViewRowAnimationNone]; } }