WKWebview加载SVG显示不全

WKWebview加载SVG显示不全,或者WKWebview加载html显示不全.要注入一段js代码

- (void)configUI{

    CGFloat gap = 16;
//    self.webview = [[WKWebView alloc] initWithFrame:CGRectMake(gap, 10,kUIScreenWidth - gap * 2 , 10)];
    // 解决内存泄露问题
    WKWebViewConfiguration*config = [[WKWebViewConfiguration alloc]init];
    config.selectionGranularity = WKSelectionGranularityCharacter;
    
    // 让网页内容自适应大小
    NSString *jScript = @"var meta = document.createElement('meta'); meta.setAttribute('name', 'viewport'); meta.setAttribute('content', 'width=device-width'); document.getElementsByTagName('head')[0].appendChild(meta);";
    WKUserScript *wkUScript = [[WKUserScript alloc] initWithSource:jScript injectionTime:WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly:YES];
    WKUserContentController *wkUController = [[WKUserContentController alloc] init];
    [wkUController addUserScript:wkUScript];
    config.userContentController = wkUController;
    
    // 创建WKWebView
    self.webview = [[WKWebView alloc] initWithFrame:CGRectMake(gap, 10,kUIScreenWidth - gap * 2 , 10) configuration:config];
    [self.contentView addSubview:self.webview];

    self.webview.navigationDelegate = self;
}
- (void)configureCellWithStr:(NSString *)contentstr
{
    //"<style>img{width:%f !important;height:auto}

    NSString *headerString = @"

";
    [self.webview loadHTMLString:[headerString stringByAppendingString:self.htmlStr ? self.htmlStr : @""] baseURL:nil];
//    [self.webview loadHTMLString:self.htmlStr baseURL:nil];
 
}