TTMSFMXNativeCMAltimeter

Usage

Use the TMSFMXNativeCMAltimeter component to detect changes of altitude-related data to your app. (iOS 8 or later)

Methods

Methods name	Description
Altimeter	Returns a reference to native the CMAltimeter class.
RelativeAltitudeAvailable	Verify whether your device is capable of monitoring changes in relative altitude.
StartRelativeAltitudeUpdates	Starts monitoring changes in relative altitude.
StopRelativeAltitudeUpdates	Stops monitoring changes in relative altitude.

Events

Events name	Description
OnRelativeAltitudeChanged	Event called when the relative altitude changes.
OnRelativeAltitudeError	Event called when an error occurred during relative altitude data changes.

Sample obtaining relative altitude updates

Through an anonymous method

if TMSFMXNativeCMAltimeter1.RelativeAltitudeAvailable then
begin
  TMSFMXNativeCMAltimeter1.StartRelativeAltitudeUpdates(
  procedure (AData: TTMSFMXNativeCMAltitudeData)
  begin
    Label1.Text := 'Relative altitude is ' +  floattostr(AData.RelativeAltitude);
    Label2.Text := 'Pressure is ' +  floattostr(AData.Pressure);
  end
  )
end;

Through an event

if TMSFMXNativeCMAltimeter1.RelativeAltitudeAvailable then
  TMSFMXNativeCMAltimeter1.StartRelativeAltitudeUpdates;

procedure TForm107.TMSFMXNativeCMAltimeter1RelativeAltitudeChanged(
  Sender: TObject; AData: TTMSFMXNativeCMAltitudeData);
begin
  Label1.Text := 'Relative altitude is ' +  floattostr(AData.RelativeAltitude);
  Label2.Text := 'Pressure is ' +  floattostr(AData.Pressure);
end;