Cannot convert value of type '[String]' to expected argument type '[CDYelpPriceTier]?'

Question

I am working on an app that requires me to make a call from yelp. In the yelp call, I want to replace the [.oneDollarSign, .twoDollarSigns] with "pricestring".
I get the following error when I change the code to priceTiers: pricestring

Cannot convert value of type '[String]' to expected argument type '[CDYelpPriceTier]?'

//Array declaration  
         var pricestring = [String]()

         //Set pricestring
          pricestring.append(".oneDollarSign, .twoDollarSigns")
        //Yelp Call
            yelpAPIClient.searchBusinesses(byTerm: "Food",
                 ....

            priceTiers: [.oneDollarSign, .twoDollarSigns], <----

            attributes: nil)

From the CDYelpFusionKit Documentation:

 price: (Optional) The pricing levels to filter the search result with. 
 Use the **CDYelpPriceTier** enum to get the list of supported pricing levels. 
 `price` can be an array of pricing levels (e.g. [.oneDollarSign, .twoDollarSigns, .threeDollarSigns] will filter the results to show businesses that are listed as $, $$, or $$$).

What do I have to do to be able to replace the [.oneDollarSign, .twoDollarSigns] with a variable?

Answer 1

Declare

//Array declaration
var priceLevels = [CDYelpPriceTier]()

Set

//Set pricestring
priceLevels.append(contentsOf: [.oneDollarSign, .twoDollarSigns])

and use it

, ... priceTiers: priceLevels, ...