topic Re: Qt on IOS in Qt Maps SDK Questions

Qt on IOS

BrianLocke — Mon, 08 Dec 2014 23:00:32 GMT

Finally, though it took a couple of days.... (helps if you read the docs I guess....) got Runtime for Qt over on IOS..... problems is GPS location does not work.... centers in at 0,0 for wkid 4326. Also any layers that use https: will not display?? getting this error??

QObject::connect: Incompatible sender/receiver arguments

QNetworkSessionPrivateImpl::usagePoliciesChanged(QNetworkSession::UsagePolicies) --> QNetworkSession::usagePoliciesChanged(QNetworkSession::UsagePolicies)

hmmmm.... has me scratching my head and I must admit that I am still getting used to the cryptic error messages that Qt usually gives.

Taking a swing at things I am wondering if these issues have something to do with the Info.plist???? Do I need to add some keys?? I did read in the docs that Qt does support Https over rest... which I am doing?? Any suggestions ?? I know things are in Beta but was hoping to generate some excitement for Ipads.

Re: Qt on IOS

LucasDanzinger — Mon, 15 Dec 2014 18:14:25 GMT

Brian,

For the GPS Position, this should work- we use this internally all the time. Can you share your code? The below code works for me on iOS (and other platforms).

import QtQuick 2.3

import QtQuick.Controls 1.2

import QtPositioning 5.3

import ArcGIS.Runtime 10.3

ApplicationWindow {

id: appWindow

width: 800

height: 600

title: "ios position"

Map {

anchors.fill: parent

wrapAroundEnabled: true

focus: true

ArcGISTiledMapServiceLayer {

url: "http://services.arcgisonline.com/ArcGIS/rest/services/NatGeo_World_Map/MapServer"

}

positionDisplay {

positionSource: PositionSource {

id: positionSource

onPositionChanged: {

console.log(position.coordinate.longitude);

console.log(position.coordinate.latitude);

}

Button {

anchors {

left: parent.left

top: parent.top

margins: 15

}

text: "show position"

onClicked: positionSource.active = true;

}

Re: Qt on IOS

LucasDanzinger — Mon, 15 Dec 2014 18:24:32 GMT

And as far as the https, I gave this a try with an internal dynamic map service, and it works. In this case, it uses https, but doesn't require credentials. Are you using a different layer, such as a feature layer or tiled layer? Do you require the user to enter credentials? If so, please look at the User Credentials Online sample in the sample app. You can use the identify manager to notify if you require credentials or not.

ArcGISTiledMapServiceLayer {

url: "http://services.arcgisonline.com/ArcGIS/rest/services/NatGeo_World_Map/MapServer"

}

ArcGISDynamicMapServiceLayer {

url: "https://servername:6080/arcgis/rest/services/Map6/MapServer"

}

Re: Qt on IOS

BrianLocke — Fri, 19 Dec 2014 23:42:55 GMT

Here is the code for the Location, I have tried this on an Ipad 2 and also an Air 2 with the same Results-publishing to Android works fine though .... Save there is no Compass support on Android.

I have removed the specific server as were not to make the Services Public Quite yet, Also Removing the s out of HTTPS: works?? the services have had the token removed and seem to work fine just using http? This is odd because in the other runtimes this will not work (iOS, Android and .Net)... hmmmm

Thanks for the speedy response back

import QtQuick 2.1

import QtQuick.Controls 1.0

import QtQuick.Dialogs 1.2

import QtQuick.Window 2.0

import QtQuick.Layouts 1.1

import ArcGIS.Runtime 10.3

import ArcGIS.Runtime.Toolkit.Dialogs 1.0

import QtPositioning 5.3

import QtSensors 5.3

ApplicationWindow {

    id: appWindow

    width: 320

    height: 480

    title: "WrmsLite"

Rectangle{

    anchors.fill: parent

    property int hitFeatureId:0

    property variant attrValue

    property real scaleFactor: 1

    property bool settingsView: true

    states:[

    State{

            name:"Settings"

            when:settingsDisplay

            changes:[

                PropertyChanges {

                    target: settingsDisplay

                    anchors.fill:parent},

                PropertyChanges{

                    target:mainMap

                    visible:false}

    Rectangle{

        id:settingsDisplay

        anchors.fill: parent

        color:"white"

    GeodatabaseFeatureServiceTable{

       id:incidentsFeatureService

       url:"https://SERVER/arcgis/rest/services/WRMS/Incidents/MapServer/0"

    Map{

        property Point locationPoint: Point{

            property bool valid: false

            spatialReference: SpatialReference{

                wkid: 4326

        id:mainMap

        anchors.fill: parent

        ArcGISTiledMapServiceLayer{

            id:basemap

            url:"http://Server/arcgis/rest/services/USA_Topo_Maps/MapServer"

        ArcGISDynamicMapServiceLayer{

            id:publicOwnership

            url:"https://Server/arcgis/rest/services/WebMercator/PublicOwnership/MapServer"

            opacity: 0.4

        ArcGISDynamicMapServiceLayer{

            id:plss

            url: "https://Server/arcgis/rest/services/WebMercator/PLSS/MapServer"

        ArcGISDynamicMapServiceLayer{

            id:lightning24

            url:"https://Server/arcgis/rest/services/WebMercator/Lightning24hours/MapServer"

        //ArcGISDynamicMapServiceLayer{

           // id:incidents

           // url:"https://Server/arcgis/rest/services/WRMS/Incidents/MapServer"

//}

        FeatureLayer{

            id:incidentsFeatureLayer

            featureTable: incidentsFeatureService

        positionDisplay{

            compass:Compass{

                    id:compass

                positionSource: PositionSource{

                id:positionSource

                onPositionChanged: {

                    mainMap.locationPoint.valid = position.latitudeValid&&position.longitudeValid;

                    mainMap.locationPoint.x = position.coordinate.longitude;

                    mainMap.locationPoint.y = position.coordinate.latitude;

                    locationPointChanged();

                onError: {

                    console.log("There was an error with the Positional Display... Not sure as to why")

        onMapReady:extent=oregonExtent

        onMouseClicked: {

            var features = incidentsFeatureLayer.findFeatures(mouse.x,mouse.y,0,1);

            for (var i=0;i<features.length;i++)

                hitFeatureId =features[i];

                getFields(features);

                identifyDialog.title = "ObjectID" + hitFeatureId;;

                identifyDialog.visible = true;

    ServiceInfoTask{

    SimpleDialog {

            id: identifyDialog

            title: "Object ID: " + hitFeatureId

            height: (column.height * 1.3) * scaleFactor

            width: (column.width * 1.05) * scaleFactor

            Column {

                id: column

                spacing: 5 * scaleFactor

                anchors.centerIn: parent

                Repeater {

                    model: fieldsModel

                    Row {

                        id: row

                        spacing: (80 * scaleFactor)  - nameLabel.width

                        Label {

                            id: nameLabel

                            text: name + ": "

                            font.pixelSize: 10 * scaleFactor

                        Label {

                            text: value

                            font.pixelSize: 10 * scaleFactor

            onRejected: {

                hitFeatureId = 0;

    Envelope{

        id:oregonExtent

        xMin:-13884932.6524728

        xMax:-12942012.5881222

        yMin:5152699.92331632

        yMax:5836354.32813466

        spatialReference: SpatialReference{

            wkid: 102100

    ListModel{

        id:fieldsModel

    ListModel{

        id:layers

    ListModel{

        id:basemapLayers

    Rectangle{

        id:topBar

        color: "black"

        height:parent.height/10

        width:parent.width

        opacity: .75

        Text{

            id:latLonPostionalData

            visible:positionSource.active

            color:"white"

            anchors.left: parent.left

            anchors.leftMargin: 10

            anchors.verticalCenter: parent

        Button{

            id:gpsButton

            iconSource: "qrc:/Resources/GpsIcon.png"

            width: parent.height - parent.height * .1

            height: parent.height - parent.height * .1

            anchors.verticalCenter: parent.verticalCenter

            anchors.right: parent.right

            anchors.rightMargin: 10

            onClicked: {

                positionSource.active = true;

                compass.active = true;

                console.log("Hey you just clicked the button to turn the gps on" + qsTr(mainMap.positionDisplay.mode.toString()))

    function getFields( featureLayer ) {

          fieldsModel.clear();

          var fieldsCount = incidentsFeatureLayer.featureTable.fields.length;

          for ( var f = 0; f < fieldsCount; f++ ) {

              var fieldName = incidentsFeatureLayer.featureTable.fields[f].name;

              attrValue = incidentsFeatureLayer.featureTable.feature(hitFeatureId).attributeValue(fieldName);

              if ( fieldName !== "Shape" ) {

                  var attrString = attrValue;

                  fieldsModel.append({"name": fieldName, "value": attrString});

    function locationPointChanged(){

        latLonPostionalData.text = "Lat: "+positionSource.position.coordinate.latitude+" Lon: "+positionSource.position.coordinate.longitude+" Alt: "+positionSource.position.coordinate.altitude;