Populating the Breather UI with sample data.

PopulatingUIwithSampleData.swift

// MARK: - Properties

private let data = CityConditions.sampleData()

// MARK: - Actions

@IBAction func aqiStandardSegmentedControlValueChanged(_ sender: UISegmentedControl) {
    updateAirQualityUI()
}

// MARK: - Lifecycle

override func viewDidLoad() {
    super.viewDidLoad()
    updateUI()
}

// MARK: - Methods

private func updateUI() {
    cityLabel.text = data.city
    updateWeatherUI()
    updateAirQualityUI()
    updateAsthmaUI()
}

private func updateWeatherUI() {
    weatherImageView.image = UIImage(named: Asset.forIconCode(data.weather.iconCode))
    temperatureLabel.text = "\(data.weather.temperature)℃"
    temperatureLabel.textColor = Color.forTemperature(data.weather.temperature)
    humidityLabel.text = "Humidity: \(data.weather.humidity)%"
    pressureLabel.text = "Pressure: \(data.weather.pressure) hPa"
    windLabel.text = "Wind: \(data.weather.windSpeed) m/s"
    let rotationAngle = (CGFloat(data.weather.windDirection) * .pi) / 180.0
    windDirectionImageView.transform = CGAffineTransform(rotationAngle: rotationAngle)
}

private func updateAirQualityUI() {
    if aqiStandardSegmentedControl.selectedSegmentIndex == 0 {
        airQualityLabel.text = Text.forAQI(data.pollution.aqiUS)
        airQualityLabel.textColor = Color.forAQI(data.pollution.aqiUS)
        aqiLabel.text = "AQI: \(data.pollution.aqiUS)"
        let text = "Main pollutant: \(Text.forMainPollutant(data.pollution.mainPollutantUS))"
        mainPollutantLabel.setAttributedTextWithSubscripts(text: text,
                                                           indicesOfSubscripts: text.indicesOfNumbers)
    } else if aqiStandardSegmentedControl.selectedSegmentIndex == 1 {
        airQualityLabel.text = Text.forAQI(data.pollution.aqiChina)
        airQualityLabel.textColor = Color.forAQI(data.pollution.aqiChina)
        aqiLabel.text = "AQI: \(data.pollution.aqiChina)"
        let text = "Main pollutant: \(Text.forMainPollutant(data.pollution.mainPollutantChina))"
        mainPollutantLabel.setAttributedTextWithSubscripts(text: text,
                                                           indicesOfSubscripts: text.indicesOfNumbers)
    }
}

private func updateAsthmaUI() {
    asthmaRiskLabel.text = data.asthma.risk.capitalized
    asthmaRiskLabel.textColor = Color.forAsthmaRisk(data.asthma.risk)
    asthmaProbabilityLabel.text = "Probability: \(data.asthma.probability)%"
}