iOS 上的地理位置仅在使用活动地图视图的情况下更新待机

Question

我已经尝试在 iOS 上计算地理位置已经有一段时间了，得出了一些奇怪的结论：

当应用程序打开时（不是处于待机状态或其他状态），地理位置非常准确。 当您将手机置于待机状态或最小化应用程序时，它会跳转到 AGPS，将位置更改为附近的 G 塔等。

但是；如果我在应用程序中有一个地图视图，并且每次触发事件时我都会更新用户位置，它似乎在待机和非待机状态下也能正常工作。 这个地图视图触发了什么，所以它会停留在普通 GPS 上而不是 AGPS 上？

这是地图视图的创建：

var mapview = Ti.Map.createView({
    bottom: -300,
    height: 200,
    mapType: Ti.Map.STANDARD_TYPE,
    region: {
        latitude: 0,
        longitude: 0, 
        latitudeDelta: delta,
        longitudeDelta: delta
    },
    animate:true,
    regionFit:true,
    userLocation:true
});

mainWindow.add(mapview);

以及位置处理：

//Set a timestamp on the current time. This is being checked later to see if its 5 minutes later(Because setInterval isn't trustworthy check will be done this way)
var realTime = new Date();
realTime = realTime.getTime();

//Set the battery time to be on the currenttime plus 5 minutes
batteryTimeToBe = realTime+batteryTimeIncrement;

//Empty interval and text to make a clean (re)start
clearInterval(interval);

//Set a half second timer on the stop button appearing(So people can't double tap the buttons)
stopTimeout = setTimeout(showStopButton, 1000);

//Switch the textlabels and buttons from startview to stopview
stopText.show();
startText.hide();
btnStart.hide();

//Locationhandler
location.start({ 
    action: function (e) {
        if (e.coords) {


            mapview.setLocation({
                latitude: e.coords.latitude,
                longitude: e.coords.longitude,
                animate: false,
                latitudeDelta: delta,
                longitudeDelta: delta
            });


            //If the newly acquired location is not the same as the last acquired it is allowed
            if (e.coords.longitude != lastLon && e.coords.latitude != lastLat) {
                //set the last acquired locations+other info to their variables so they can be checked(and used)
                lastLat = e.coords.latitude;
                lastLon = e.coords.longitude;

                lastKnownAltitude = e.coords.altitude;
                lastKnownHeading = e.coords.heading;
                lastKnownSpeed = e.coords.speed;

                if (lastLat != 0 && lastLon != 0) {
                    setGPSholder(lastLat, lastLon, lastKnownAltitude, lastKnownHeading, lastKnownSpeed);
                } else {
                    GPSSaved.text = 'Geen coordinaten.';
                }
            }
        }

        var timeNow = new Date();
        timeNow = timeNow.getTime();
        //If the now-time is higher or equal to the batteryTimeToBe(Which is reset after every call or when the start button is fired) send the batteryLevel
        if (timeNow >= batteryTimeToBe) {
            sendBatteryLevel();
            batteryTimeToBe = timeNow+batteryTimeIncrement;
            timeNow = null;
            //Ti.API.info(new Date());
        }

    }
});

/*
A second interval which shows a counter to the user and makes sure a location is sent
roughly every 5 seconds(setInterval isn't accurate though)
A lot of counters are tracked for several reasons:
    minuteInterval:     Counter which makes sure the last location is sent after a minute if no new one is found in the meantime
    secondsLastSent:    The visual counter showing the user how long its been for the last save(Is reset to 0 after a succesful save)
    */
interval = setInterval(function () {
    minuteInterval++;
    secondsLastSent++;

    counterBlock.text = "De laatste locatie is " + secondsLastSent + " seconden geleden verstuurd";

    //If the counter is higher than 5 send a new coordinate. If at the same time the minuteInterval is over a minute
    //The last location is put in the array before calling the sendCoordinates
    if (counter >= 5) {
        if (minuteInterval > 60) {
            if (lastLat != 0 && lastLon != 0) {
                setGPSholder(lastLat, lastLon, lastKnownAltitude, lastKnownHeading, lastKnownSpeed);
            }
        }
        counter = 1;
        sendCoordinates();
    } else {
        counter++;
    }
}, 1000);

Answer 1

关于钛：

Titanium.Geolocation.accuracy = Titanium.Geolocation.ACCURACY_BEST; (or ACCURACY_HIGH)

钛中的位置有一个属性提供者，它的属性准确性可以很好也可以很正常。检查罚款。进一步检查提供者的名称

在 Titanium 中有自动定位和手动定位模式。使用手动模式并尝试是否可以将电池消耗设置为高，并将精度设置为高。 （GPS总是需要高电量，没有办法解决这个问题，没有低电量GPS）