string - Swift - how to convert hyphen/minus sign into + sign -

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i obtaining address in string variable ios reverse geocoding below code.

    clgeocoder().reversegeocodelocation(imagelocation, completionhandler:                     {(placemarks, error) in       dispatch_async(dispatch_get_main_queue(), {                              if (error != nil) {println("reverse geodcode fail: \(error.localizeddescription)")       textfield.placeholder = "address not found."                    }  else     {  if placemarks.count > 0     { var placemark:clplacemark = placemarks[0] as! clplacemark      var locationaddress:nsarray = placemark.addressdictionary["formattedaddresslines"]   as! nsarray  var tmpaddress = locationaddress.componentsjoinedbystring("\n")  textfield.text = tmpaddress string                                 }                             }                         })                 })

tmpaddress variable has address - "2362-2658 w 12th st\ncity, state 20301\ncountry name"

i need change 2362-2658 2362+2658 in tmpaddress variable not able 

tmpaddress = tmpaddress.stringbyreplacingoccurrencesofstring("-", withstring: "+")

or 

tmpaddress = tmpaddress.stringbyreplacingoccurrencesofstring("\u{2212}", withstring: " ")

please can suggest why stringbyreplacingoccurrencesofstring above not working , how can accomplished.

tmpaddress = tmpaddress.stringbyreplacingoccurrencesofstring("-", withstring: "+")

this replaces '-' '+'

the first parameter search string, , second replacement string.


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