Value of type 'Double' has no member 'roundDouble'-CodePudding

I am trying to code a weather app in swift and I keep getting this

error: Value of type 'Double' has no member 'roundDouble'.

This is the line resulting in the error

WeatherRow(logo: "thermometer", name: "Max temp", value: (weather.main.tempMax.roundDouble()   "°"))

struct MainResponse: Decodable {
    var temp: Double
    var feels_like: Double
    var temp_min: Double
    var temp_max: Double
    var pressure: Double
    var humidity: Double
}

CodePudding user response：

The syntax to round is round(var), not var.roundDouble(). (example)

Using the following function call: round(weather.main.tempMax)

CodePudding user response：

Instead of converting a Double to String, use a formatter. In this case you can save yourself some work by using MeasurementFormatter, example:

let formatter = MeasurementFormatter()
formatter.numberFormatter.maximumFractionDigits = 0

let maxTemperature = 42.54
let measurement = Measurement(
    value: maxTemperature,
    unit: UnitTemperature.celsius
)

let formattedTemperature = formatter.string(from: measurement)
print(formattedTemperature) // 43°C