Ios Gdx.net.sendHttpRequest() not active

1

I use Gdx.net.sendHttpRequest() to get value string

private Net.HttpRequest httpRequest;

private void load_data() {
    String httpMethod = Net.HttpMethods.GET;
    String requestContent = null;
    httpRequest = new Net.HttpRequest(httpMethod);
    httpRequest.setUrl("https://discuss.multi-os-engine.org/t/cant-download-file-from-https/508/10");
    httpRequest.setContent(requestContent);

    Gdx.net.sendHttpRequest(httpRequest, new Net.HttpResponseListener() {

        @Override
        public void handleHttpResponse(Net.HttpResponse httpResponse) {
            // TODO Auto-generated method stub
            String rs = httpResponse.getResultAsString();
            text.setText(rs);
        }

        @Override
        public void failed(Throwable t) {
            // TODO Auto-generated method stub

        }

        @Override
        public void cancelled() {
            // TODO Auto-generated method stub

        }
    });

// Gdx.net.cancelHttpRequest(httpRequest);
}

In android, every show ok. but in ios nothing show. I config ios-moe like

How do i do for that? Please help me.

2

It error when i use:
moe {
proguardLevel ‘all’
}

and in proguard file:
-keep class com.badlogic.** { ; }
-keep enum com.badlogic.* { *; }
-keep interface apple.uikit.protocol.UIApplicationDelegate { *; }

when i remove
moe {
proguardLevel ‘all’
}
it show again. But if remove proguardLevel ‘all’ size is too large. How to config proguard in this case, Please?