Using the Same Currency Formatting in Multiple Methods

Question

I'm using some currency formatting to set currency symbols/styles to the user's local settings. Here is my code. I think it works fine. It is located in my viewDidLoad.

let currencyFormat = NumberFormatter()    
currencyFormat.locale = NSLocale.current
currencyFormat.usesGroupingSeparator = true
currencyFormat.numberStyle = NumberFormatter.Style.currency
...
labelTotalAmount.text = currencyFormat.string(for: totalAmount)

The trouble is, I want to use this same formatting in two other different Methods. It seems to be a waste to repeat the formatting for each method whenever I want to do formatting.

Is there a way to set the formatting once and have it remember the settings in every method of the class?

I'm using Swift 3. I appreciate any help you can give!!

Answer 1

Make it a computed property of the class:

class Whatever {
    let currencyFormat: NumberFormatter = {
        let res = NumberFormatter()
        res.numberStyle = .currency
        res.usesGroupingSeparator = true
        return res
    }()
}

Now you can use that property in any method.

func someMethod() {
    let str = currencyFormat.string(for: 5.99)
}