Print all available sensors name

I’d start with the function which returns an iterator of sensors

getRegisteredSensors

https://developer.garmin.com/connect-iq/api-docs/Toybox/Sensor.html#getInfo-instance_function

getRegisteredSensors() returns an iterator, not an array. Note that even though the API functions which return an iterator are not documented to return null, in practice they can return null (I think, based on what others have posted in the forums).

e.g.

var sensorIterator = Sensor.getRegisteredSensors(null);
if (sensorIterator != null) {
    while (true) {
        var sensor = sensorIterator.next();
        if (sensor == null) {
            break;
        }
        System.println(sensor.name);
    }
}

Yes it's awkward.

Personally I would probably go with something like this:

var sensorIterator = Sensor.getRegisteredSensors(null);
var sensor = sensorIterator != null ? sensorIterator.next() : null;
while (sensor != null) {
    System.println(sensor.name);
    sensor = sensorIterator.next();
}

Thank you, It's so different from Swift in Swift things are more easy and friendly.
I still don't know why my sensor var is always null I need to check it

var sensorIterator = Sensor.getRegisteredSensors(null);

while (sensorIterator != null) {
     var sensor = sensorIterator.next();

         if (sensor == null) {
            System.println("No more sensors");
             break;
        }

      System.println(sensor.name);
}

8848512 said:

Thank you, It's so different from Swift in Swift things are more easy and friendly.

Yeah...

8848512 said:

I still don't know why my sensor var is always null I need to check it

Are you running this in the sim or a real device? I'm not sure if the sim will ever show any registered sensors.

Yeah on simulator