iOS获取cell中webview的内容尺寸

#import "STBaseTableViewCell.h"@class STHTMLBaseCell;
@protocol STHtmlBaseDelegate <NSObject>
- (void)webViewDidLoad:(STHTMLBaseCell *)cell height:(CGFloat)height;
@end
@interface STHTMLBaseCell : STBaseTableViewCell
@property (weak, nonatomic) id<STHtmlBaseDelegate>delegate;

@end

#import "STHTMLBaseCell.h"

@interface STHTMLBaseCell()<UIWebViewDelegate>

@property (weak, nonatomic) IBOutlet UIWebView *webView;@end

@implementation STHTMLBaseCell

- (void)awakeFromNib {
  [super awakeFromNib];
  // Initialization code
  self.webView.scrollView.scrollEnabled = NO;
  self.webView.scrollView.pagingEnabled = NO;
  self.webView.delegate = self;
  self.webView.backgroundColor = [UIColor whiteColor];
}
- (void)configCellWithHtml:(NSString *)html //外界传入的html字符串
{
  [self.webView loadHTMLString:html baseURL:nil];//加载html
}

#pragma mrak - UIWebViewDelegate
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
  
  [webView stringByEvaluatingJavaScriptFromString:@"document.documentElement.style.webkitUserSelect='auto';"];//让用户可以选中webview里面内容
  [webView stringByEvaluatingJavaScriptFromString:@"document.documentElement.style.webkitTouchCallout='auto';"];//可以响应用户的手势
  
  NSURL *url = [request URL];
  if (![url host]) {
    return YES;
  }
 return NO;
}

- (void)webViewDidFinishLoad:(UIWebView *)webView
{
  CGFloat height = [[webView stringByEvaluatingJavaScriptFromString:
             @"document.body.scrollHeight"] floatValue]; //获取webview内容的高度
  self.webView.height = height;
  if ([self.delegate respondsToSelector:@selector(webViewDidLoad:height:)]) {
    [self.delegate webViewDidLoad:self height:height];//调用代理的方法 
  }
}


@end