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LF/HF ​

The LF/HF value is sent as part of the final results.

The application can receive the LF/HF result by implementing VitalSignsListener:

Swift
func onFinalResults(results: VitalSignsResults) {
    DispatchQueue.main.async {
        if let lfhf = results.getResult(of: VitalSignTypes.lfhf) as? VitalSignLFHF {
            print("LF/HF: \(lfhf.value)")
        }
    }
}
Objective-C
- (void)onFinalResultsWithResults:(BIOVitalSignsResults *)results {
    dispatch_async(dispatch_get_main_queue(), ^{
        BIOVitalSignLFHF *lfhf = (BIOVitalSignLFHF *)[results getResultOf:BIOVitalSignTypes.lfhf];
        if (lfhf != nil) {
            NSLog(@"LF/HF: %f", lfhf.value);
        }
    });
}

For general information about vital signs see the Vital Signs and Health Indicators Information Document. For a list of supported vital signs per platform and measurement mode (face/polar) see the Supported Vital Signs Document.

Important

Note that vital signs are sent on a background thread. The application must switch to the UI thread in order to perform UI updates.