iOS WKWebView 网页禁止缩放

-(WKWebView*)baseWkWebView

{

    WKWebViewConfiguration *wkWebConfig = [[WKWebViewConfiguration alloc] init];

       WKUserContentController *wkUController = [[WKUserContentController alloc] init];

    wkWebConfig.allowsInlineMediaPlayback = YES;

    wkWebConfig.mediaTypesRequiringUserActionForPlayback = WKAudiovisualMediaTypeNone;

    WKPreferences *preferences = [WKPreferences new];

    preferences.javaScriptCanOpenWindowsAutomatically = YES;

    wkWebConfig.preferences= preferences;

     // var meta = document.createElement('meta'); meta.setAttribute('name', 'viewport'); meta.setAttribute('content', 'width=device-width'); document.getElementsByTagName('head')[0].appendChild(meta); var imgs = document.getElementsByTagName('img');for (var i in imgs){imgs[i].style.maxWidth='100%';imgs[i].style.height='auto';}

    // var meta = document.createElement('meta'); meta.setAttribute('name', 'viewport'); meta.setAttribute('content', 'width=device-width'); document.getElementsByTagName('head')[0].appendChild(meta);

    // 自适应屏幕宽度js

    //NSString *jSString = @"var meta = document.createElement('meta'); meta.setAttribute('name', 'viewport'); meta.setAttribute('content', 'width=device-width'); document.getElementsByTagName('head')[0].appendChild(meta); var imgs = document.getElementsByTagName('img');for (var i in imgs){imgs[i].style.maxWidth='100%';imgs[i].style.height='auto';}";

    // NSString *jSString = @"var meta = document.createElement('meta'); meta.setAttribute('name', 'viewport'); meta.setAttribute('content', 'width=device-width'); document.getElementsByTagName('head')[0].appendChild(meta);";

    //禁止网页缩放

    NSString *jSString = @"var script = document.createElement('script');"

    "script.type = 'text/javascript';"

    "script.text = \"function ResizeImages() { "

    "var myimg,oldwidth;"

    "var maxwidth = %f;"

    "for(i=0;i"

    "myimg = document.images[i];"

    "if(myimg.width > maxwidth){"

    "oldwidth = myimg.width;"

    "myimg.width = %f;"

    "}"

    "}"

    "}\";"

    "document.getElementsByTagName('head')[0].appendChild(script);";

       WKUserScript *wkUserScript = [[WKUserScript alloc] initWithSource:jSString injectionTime:WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly:YES];

       // 添加js调用

       [wkUControlleraddUserScript:wkUserScript];

    wkWebConfig.userContentController= wkUController;

    if (!_baseWkWebView)

    {

        _baseWkWebView=[[WKWebView alloc]initWithFrame:CGRectMake(0, Height_NavBar, SCREEN_WIDTH, SCREEN_HEIGHT-Height_NavBar) configuration:wkWebConfig];

        _baseWkWebView.scrollView.bounces = NO;

        _baseWkWebView.opaque = NO;

       // _baseWkWebView.UIDelegate = self;

       // _baseWkWebView.navigationDelegate = self;

        [_baseWkWebView sizeToFit];

     }

    return _baseWkWebView;

}