Ashley Ashley - 1 year ago 61
Swift Question

Cannot find an initializer for type Double in Swift

I would like to convert the String value I get from a text field into a Double value and store it but I keep getting the error that it cannot find an intializer for type Double that accepts an argument list type of (String). How do I fix this issue?

@IBOutlett weak var tempText: UITextField!
@IBAction func convertBtn(sender: AnyObject){
let t = Double(tempText.text!)
let temp = TempCoverterModel(temp:t!)
tempText.text = String(temp.toCelsius())

Answer Source

Use an NSNumberFormater:

let formatter = NSNumberFormatter()
let t = formatter.numberFromString(tempText.text!)!.doubleValue