创建 WKWebView
_webView = [[WKWebView alloc]initWithFrame:self.view.bounds]; _webHeight = _webView.height; _webView.backgroundColor = [UIColor whiteColor]; _webView.UIDelegate = self; _webView.navigationDelegate = self; _webView.scrollView.bounces = NO; _webView.scrollView.scrollEnabled = NO; _webView.scrollView.showsHorizontalScrollIndicator = NO; _webView.scrollView.delegate = self;WKWebView加载 html 数据：
NSString *result = [NSString stringWithFormat:@"<img style='display: block; max-width: %.0f'",kScreenWidth]; id courseData = self.object; NSAttributedString *priceStr = [ECFormatHelper attributedStringForPromotionPrice:[courseData valueForKey:@"price"] decimal:2 smallFontSize:16]; NSString *subtitle = [CYDataHelper isNull:[courseData valueForKey:@"subtitle"]]?@"还没有设置课程简介":[courseData valueForKey:@"subtitle"]; NSString *title = [CYDataHelper isNull:[courseData valueForKey:@"title"]]?@"还没有设置课程标题":[courseData valueForKey:@"title"]; NSString *teacher = [CYDataHelper isNull:[courseData valueForKey:@"teacher"]]?@"暂无":[courseData valueForKey:@"teacher"]; NSDictionary *dict = @{@"title":title,@"subtitle": subtitle,@"num":@([[courseData valueForKey:@"num"]integerValue]),@"expiryDay":@([[courseData valueForKey:@"expiryDay"]integerValue]),@"teacher":teacher}; // 这里判断 数据 空值的情况 <null> NSString *header = @"<head><meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\"/><meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0\"/><meta name=\"apple-mobile-web-app-capable\" content=\"yes\"><meta name=\"apple-mobile-web-app-status-bar-style\" content=\"black\"><link rel=\"stylesheet\" type=\"text/css\" /><style type=\"text/css\"> </style></head>"; NSString *cssStr = [NSString stringWithFormat:@"<html>%@<body>",header]; // 课程详情 NSString *content = [NSString stringWithFormat:@"%@%@%@%@", [CYDataHelper isNull:[courseData valueForKey:@"about"]]?@"":[courseData valueForKey:@"about"], [CYDataHelper isNull:[courseData valueForKey:@"audiences"]]?@"":[courseData valueForKey:@"audiences"] , [CYDataHelper isNull:[courseData valueForKey:@"goals"]]?@"":[courseData valueForKey:@"goals"], [CYDataHelper isNull:[courseData valueForKey:@"teacherInfo"]]?@"":[courseData valueForKey:@"teacherInfo"] ]; if (content.length > 0) { content = [NSString stringWithFormat:@"%@%@",@"<div style=\"color: #454545; font-size: 18px; font:Arial;\">内容简介</div>",content]; } // 把里面的图片标签遍历替换 content = [content stringByReplacingOccurrencesOfString:@"<img" withString:result]; NSString *detailHtml = [NSString stringWithFormat:@"%@%@%@",cssStr, content,@"</body></html>"]; [_dataSource addObjectsFromArray:@[priceStr,dict,detailHtml]]; [self.webView loadHTMLString:detailHtml baseURL:nil];WKWebView代理方法：
#pragma mark --- WKNavigationDelegate --- - (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation { [_webView evaluateJavaScript:@"document.body.offsetHeight" completionHandler:^(id _Nullable result, NSError * _Nullable error) { // 加20像素是为了预留出边缘 CGFloat height = [result doubleValue] + 20; // 设置一个高度属性，赋值后便于设置cell的高度 _webHeight = MAX(self.webView.height, height); // 设置cell上子视图的frame，主要是高度 _webView.frame = CGRectMake(0, 0, kScreenWidth, _webHeight); _scrollView.frame = CGRectMake(0, 0, kScreenWidth, height); _scrollView.contentSize = CGSizeMake(kScreenWidth, height); // 获取了高度之后，要更新webview所在的cell，其他的cell就不用更新了，这样能更节省资源 [self.tableView reloadRowsAtIndexPaths:[NSArray arrayWithObjects:[NSIndexPath indexPathForRow:2 inSection:0], nil] withRowAnimation:UITableViewRowAnimationNone]; }]; }创建一个 scrollview ，这样可以添加手势，双击放大倍数进行查看,webview 加在 scrollview 上。
- (UIScrollView *)scrollView { if (!_scrollView) { _scrollView = [[UIScrollView alloc]init]; _scrollView.delegate = self; _scrollView.zoomScale = 1; _scrollView.maximumZoomScale = 10; _scrollView.tag = 1000; [_scrollView addSubview:self.webView]; } return _scrollView; }然后在 tableview 的代理方法- (UITableViewCell )tableView:(UITableView )tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
中：在指定的
[cell.contentView addSubview:self.scrollView];