将UIWebView换成WKWebView后字体小

https://segmentfault.com/q/1010000010971196

WKWebView加载的网页自适应大小。https://www.jianshu.com/p/deeef3b58cb0

- (WKWebView *)webView {
    if (!_webView) {
        _webView = [[WKWebView alloc] init];
        //以下代码适配大小
        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];
        
        WKWebViewConfiguration *wkWebConfig = [[WKWebViewConfiguration alloc] init];
        wkWebConfig.userContentController = wkUController;
        
        _webView = [[WKWebView alloc] initWithFrame:self.view.frame configuration:wkWebConfig];
        [self.view addSubview:_webView];
        _webView.navigationDelegate = self;
    }
    return _webView;
}

https://www.jianshu.com/p/deeef3b58cb0

https://www.jianshu.com/p/49c38f10ef4a

修改了图片或者字体，webView加载一定要记得清楚缓存！！！！

if ([[[UIDevice currentDevice]systemVersion]intValue ] >= 9.0) {
       NSArray * types =@[WKWebsiteDataTypeMemoryCache,WKWebsiteDataTypeDiskCache]; // 9.0之后才有的
       NSSet *websiteDataTypes = [NSSet setWithArray:types];
       NSDate *dateFrom = [NSDate dateWithTimeIntervalSince1970:0];
       [[WKWebsiteDataStore defaultDataStore] removeDataOfTypes:websiteDataTypes modifiedSince:dateFrom completionHandler:^{

       }];
   }else{
       NSString *libraryPath = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory,NSUserDomainMask,YES) objectAtIndex:0];
       NSString *cookiesFolderPath = [libraryPath stringByAppendingString:@"/Cookies"];
       NSLog(@"%@", cookiesFolderPath);
       NSError *errors;
       [[NSFileManager defaultManager] removeItemAtPath:cookiesFolderPath error:&errors];

   }