iOS QQuickWidget Assert

import QtQuick 2.2
import QtQuick.Controls 1.1
import QtWebView 1.1
import QtQuick.Layouts 1.1

Rectangle {
    width: 2000
    height: 2000
    WebView {
        objectName: "webView"
        anchors.fill: parent
        id: webView
        url: "http://www.qt.io
    }
}