CODEWITHSUNDEEP
swiftvariableslabel
Edward Hasted
Edward Hasted

Reputation: 3433

Swift: Insert variable into a label?

I want to insert a variable character into an UIViewController label:

e.g. "Currency = $" when $ is a variable and could be $, £, € depending.

How do you program with this?

Upvotes: 0

Views: 3146

Answers (4)

Hugo Alonso
Hugo Alonso

Reputation: 6824

This is a clean approach into this:

func currencySymbol(currency: String) -> String {
    switch currency {
        case "dollar": return "$"
        case "British pound": return "£"
        case "yen": return "¥"
        ///add others as needed
        default: return currency
    }
}

let string =  "Currency = \(currencySymbol("dollar"))"    //"Currency = $"

Upvotes: 1

user2277872
user2277872

Reputation: 2973

You would do:

var letter = "$"
// You create a new uilabel named label
label.text = "Currency = " + letter

You wanna change your letter var depending on your conditional(s).

Here is an example:

// var currency is a string used to
// read a paragraph 
 If(currency == "dollar") 
      letter = "$"
 Else if (currency == "British pound")
      letter = "£"
 Else if (currency == "yen")
      letter = "¥"
 ...

 label.text = "Currency = " + letter

Here is a reference: strings and characters: Apple

Hope this helps!

Upvotes: 2

Amloelxer
Amloelxer

Reputation: 772

I think the best way is to make separate variables for each currency characters and then append them to a string. After you can then set the text of that label to be that string. 

let currencyCharacter:String = "$"
let viewControllerLabelText:String = "Currency = " + currencyCharacter
myViewControllerLabel.text = viewControllerLabelText

Upvotes: 2

tonisuter
tonisuter

Reputation: 859

You can use string interpolation by wrapping a variable in \() like this:

let currency = "$"
currencyLabel.text = "Currency = \(currency)"

This inserts the value of that variable into the surrounding string. Look here for more information on this topic: https://developer.apple.com/library/ios/documentation/Swift/Conceptual/Swift_Programming_Language/StringsAndCharacters.html

Upvotes: 1

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