... <看更多>

if let kelvinTemp = main["temp"] as? Double { let celsiusTemp = kelvinTemp - 273.15 self.tempLabel.text = String(format: "%.0f", ... ... <看更多>

One Celsius (or Kelvin) degree as a temperature difference was defined as 1/100 of the temperature difference between the freezing point of water and ... ... <看更多>