WKWebView cannot trigger ajax to load a file on local

Question

I embed all html in WKWebView, all works until I recognize that WKWebView cannot load a xml file on the local

$.ajax({
        type: "GET",
        url: "tags.xml",
        dataType: "xml",
        cache: false,
        success: function(xml) {

        },
        error: function() {

            alert("An error occurred while processing XML file.");
        }
    });

my code for UIWebView

//urlFolder is located locally in a temporary file: tmp/www/htmlFolder 
//urlFile is located in the urlFolder: tmp/www/htmlFolder/index.html
//xml file is located in the urlFolder: tmp/www/htmlFolder/tags.xml


WKWebViewConfiguration *theConfiguration = [[WKWebViewConfiguration alloc] init];
    _webView = [[WKWebView alloc] initWithFrame:self.view.frame configuration:theConfiguration];
    [_webView loadFileURL:urlFile allowingReadAccessToURL:urlFolder];

    [self.view addSubview:_webView];

Note: I am using XCode7.1 Beta, Objective-C, ios9.1, WKWebView

Answer 1

From what I could find they disabled cross-origin requests in WKWebViews.

Search for cors or xhr + WKWebView for more information about this issue. I think it must be a bug of some sort, because this has always been possible in 'normal' UIWebViews using local files (like your example).

You can however run a small/lightweight http-server inside your app, which works great for me. Make sure to add an exception to the App Transport Security Settings in your .plist file for localhost.