jquery - Ajax Not working in IOS 9.0 Cordova

Question

$.ajax({
    type: "GET",
    url: "http://myweb/php",
    success: function (data){
        alert(data);
    },
    error:function(xhr,textStatus,err)
    {
        alert("readyState: " + xhr.readyState);
        alert("responseText: "+ xhr.responseText);
        alert("status: " + xhr.status);
        alert("text status: " + textStatus);
        alert("error: " + err);
    }
});

And the result I get is:

readyState:0
responseText:""
status:0
text status:error
error:""

I try add header in my php, but still not working. The ajax code work before i update my xcode to 7.0 and ios simulator to 9.0.

header('Content-Type: application/json');
header('Access-Control-Allow-Origin: *');

Answer 1

As far as i understood the whole ATS (App Transport Security - iOS 9) thing, the recommended method from area28 should not be the one you're using inside an application.

<key>NSAppTransportSecurity</key> 
<dict> 
    <key>NSAllowsArbitraryLoads</key><true/>
</dict>

This will allow all external requests to every domain what is definitively not the way you should use it. In my opinion you should define a new <dict> inside your info.plist and add this code to it (to edit the info.plist you can just use a normal text editor like sublime text etc.):

<key>NSAppTransportSecurity</key>
    <dict>
        <key>NSExceptionDomains</key>
        <dict>
            <key>domain.tld</key>
            <dict>
                <key>NSIncludesSubdomains</key>
                <true/>
                <key>NSTemporaryExceptionAllowsInsecureHTTPLoads</key>
                <true/>
                <key>NSTemporaryExceptionMinimumTLSVersion</key>
                <string>TLSv1.1</string>
            </dict>
        </dict>
    </dict>

This will only allow requests to the domain you specified. The described way is the one which apple introduced on the WWDC 2015. As you can see on the screenshot, it's the way apple want the users to use it.

If you haven't specified anything, you'll get

Failed to load webpage with error: The resource could not be loaded because the App Transport Security policy requires the use of a secure connection.

So, change it like i said and the error is gone away.