TableView头部试图webview与原生交互

{
    UIView*view;
    UIImageView*image;
    CGFloatwebViewHeight;
}

- (void)viewDidLoad {

    [superviewDidLoad];

    self.table=  [[UITableViewalloc]initWithFrame:CGRectMake(0,CGRectGetMaxY(self.webView.frame),kScreenWidth,kScreenHeight-  self.tabBarController.tabBar.frame.size.height)];

  self.table.delegate=self;

  self.table.dataSource=self;

  self.table.separatorStyle=UITableViewCellSelectionStyleNone;

  [self.viewaddSubview:self.table];

  view= [[UIViewalloc]initWithFrame:CGRectMake(0,0,kScreenWidth,kScreenHeight)];

  self.table.tableHeaderView=view;

  _webView= [[UIWebViewalloc]initWithFrame:CGRectMake(0,0,kScreenWidth,kScreenHeight)];

  [_webViewsetScalesPageToFit:YES];//大小自适应

  _webView.scrollView.scrollEnabled=NO;

  [self.webViewloadRequest:[[NSURLRequestalloc]initWithURL:  [NSURLURLWithString:@"你的URL"]]];

  [viewaddSubview:_webView];
  _webView.delegate=self;
  _webView.scrollView.delegate=self;
[_webView.scrollViewaddObserver:selfforKeyPath:@"contentSize"options:NSKeyValueObservingOptionNewcontext:nil];
}
- (void)observeValueForKeyPath:(NSString*)keyPath ofObject:(id)object change:(NSDictionary*)change context:(void*)context
{
    if([keyPathisEqualToString:@"contentSize"]) {
    webViewHeight= [[_webViewstringByEvaluatingJavaScriptFromString:@"document.body.scrollHeight"]floatValue];
    CGRectnewFrame=_webView.frame;
    newFrame.size.height=webViewHeight;
    _webView.frame= newFrame;
    [_webViewsizeToFit];
    CGRectFrame =view.frame;
    Frame.size.height= Frame.size.height+_webView.frame.size.height;
    view.frame= newFrame;
    [self.table setTableHeaderView:view];//这句话才是重点
    }
}

- (void)webViewDidFinishLoad:(UIWebView*)webView

{
  CGFloatsizeHeight = [[webViewstringByEvaluatingJavaScriptFromString:@"document.body.scrollHeight"]floatValue];
  self.webView.frame=CGRectMake(0,0,kScreenWidth, sizeHeight);
  stro.contentSize=CGSizeMake(kScreenWidth, sizeHeight+1);
}

- (void)didReceiveMemoryWarning {
  [superdidReceiveMemoryWarning];
}

#pragma mark返回每组行数

-(NSInteger)tableView:(UITableView*)tableView numberOfRowsInSection:(NSInteger)section{
  return5;
}

#pragma mark返回每行的单元格

-(UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath{
    staticNSString*CellIdentifier =@"Cell";
    UITableViewCell*cell = [UITableViewCell   dequeueReusableCellWithIdentifier:CellIdentifier];
    if(!cell) {
    cell = [[commentsTableViewCellalloc]initWithStyle:UITableViewCellStyleDefaultreuseIdentifier:CellIdentifierIndexPa:indexPath];
  }
  returncell;
}

#pragma mark返回每行高度

- (CGFloat)tableView:(UITableView*)tableView heightForRowAtIndexPath:(NSIndexPath*)indexPath
{
  return150;
}