swift 3 error : Argument labels '(_:)' do not match any available overloads

Question

Just converted a project to Swift 3 and cant figure out the following error.

public func currencyString(_ decimals: Int) -> String {

    let formatter =          


        

Answer 1

Swift 3.0.1

public func currencyString(_ decimals: Int) -> String {
    let numberFormatter = NumberFormatter()
    numberFormatter.numberStyle = .currency
    numberFormatter.formatterBehavior = .default
    let priceString = numberFormatter.string(from: NSNumber(value:product.introPrice))
    return priceString!
}

Difference between syntex

// Old code
formatter.string(from: NSNumber(product.introPrice))!

// swift 3.0.1
formatter.string(from: NSNumber(value:product.introPrice)