"downcast from CLplacemark? to Clplacemark only unwraps optional"(swift2) -


how fix error : 

"downcast clplacemark? clplacemark unwraps optional"

so use code :

if let p = clplacemark(placemark: placemarks.first as? clplacemark){}

and change placemarks[0] array not work

and code : 

clgeocoder().reversegeocodelocation(userlocation) { (placemarks, error) -> void in      if error == nil {         if let p = clplacemark(placemark: placemarks[0] as? clplacemark){              print(p)             self.adsresslabel.text = "\(p.administrativearea)\(p.postalcode)\(p.country)"         }       }else {         print (error)     }       }

at code :

if let p = clplacemark(placemark: placemarks[0] as? clplacemark)

i have error 

 "downcast clplacemark? clplacemark unwraps optional"

how fix error ?!

if don't need make copy of first placemark, need : 

if let p = placemarks.first {         print(p)         self.adsresslabel.text = "\(p.administrativearea)\(p.postalcode)\(p.country)" }

on other hand, if need copy:

if let p0 = placemarks.first {          let p = clplacemark(placemark:p0)         print(p)         self.adsresslabel.text = "\(p.administrativearea)\(p.postalcode)\(p.country)" }

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