Join strings in a block

I have a block that updates the view for each String. In its object class I pass it by:

func eachFeaturesSection(block: ((String?) -> Void)?) {
propertyFeatures.forEach { feature in
  guard let feature = feature as? RealmString else {
    return
  }
  let features = feature.stringValue
    block?(features)
 }
}

and I will get it in ViewController, by:

listing!.eachFeaturesSection({ (features) in
  print(features)
  self.facilities = features!
})

So it will print as:

Optional("String 1")
Optional("String 2")

and self.facilities will be set to latest value which is self.facilities = "String 2"

cell.features.text = features // it will print String 2

So, how can I achieve to join all strings together in one string such as self.facilities = "String 1, String 2". I used .jointString does not work. Thank you for any help.

Maybe you could add them to an array of String elements and then, when done, call joined on that array.

So something like this in your ViewController:

var featuresArray = [String]()

listing!.eachFeaturesSectionT({ (features) in
    print(features)
    featuresArray.append(features!)
})

//Swift 3 syntax
cell.features.text = featuresArray.joined(separator: ", ")

//Swift 2 syntax
cell.features.text = featuresArray.joinWithSeparator(", ")

Hope that helps you.