recognizeCelebrities.swift

rekognitionObject?.recognizeCelebrities(celebRequest!){
          (result, error) in
          if error != nil{
              print(error!)
              return
          }

          //1. First we check if there are any celebrities in the response
          if ((result!.celebrityFaces?.count)! > 0){

              //2. Celebrities were found. Lets iterate through all of them
              for (index, celebFace) in result!.celebrityFaces!.enumerated(){

                  //Check the confidence value returned by the API for each celebirty identified
                  if(celebFace.matchConfidence!.intValue > 50){ //Adjust the confidence value to whatever you are comfortable with

                      //We are confident this is celebrity. Lets point them out in the image using the main thread
                      DispatchQueue.main.async {
                          [weak self] in

                          //Create an instance of Celebrity. This class is availabe with the starter application you downloaded
                          let celebrityInImage = Celebrity()

                          celebrityInImage.scene = (self?.CelebImageView)!

                          //Get the coordinates for where this celebrity face is in the image and pass them to the Celebrity instance
                          celebrityInImage.boundingBox = ["height":celebFace.face?.boundingBox?.height, "left":celebFace.face?.boundingBox?.left, "top":celebFace.face?.boundingBox?.top, "width":celebFace.face?.boundingBox?.width] as! [String : CGFloat]

                          //Get the celebrity name and pass it along
                          celebrityInImage.name = celebFace.name!
                          //Get the first url returned by the API for this celebrity. This is going to be an IMDb profile link
                          if (celebFace.urls!.count > 0){
                              celebrityInImage.infoLink = celebFace.urls![0]
                          }
                              //If there are no links direct them to IMDB search page
                          else{
                              celebrityInImage.infoLink = "https://www.imdb.com/search/name-text?bio="+celebrityInImage.name
                          }
                          //Update the celebrity links map that we will use next to create buttons
                          self?.infoLinksMap[index] = "https://"+celebFace.urls![0]

                          //Create a button that will take users to the IMDb link when tapped
                          let infoButton:UIButton = celebrityInImage.createInfoButton()
                          infoButton.tag = index
                          infoButton.addTarget(self, action: #selector(self?.handleTap), for: UIControlEvents.touchUpInside)
                          self?.CelebImageView.addSubview(infoButton)
                      }
                  }

              }
          }
              //If there were no celebrities in the image, lets check if there were any faces (who, granted, could one day become celebrities)
          else if ((result!.unrecognizedFaces?.count)! > 0){
              //Faces are present. Point them out in the Image (left as an exercise for the reader)
              /**/
          }
          else{
              //No faces were found (presumably no people were found either)
              print("No faces in this pic")
          } 
      }