IOS CIDetector检测出人脸区域

1 import UIKit 2 class ViewController：UIViewController { 3 override func viewDidLoad() { 4 super.viewDidLoad() 5 // Do any additional setup after loading the view, typically from a nib. 6 self.view.backgroundColor = UIColor.black 7 8 let image = UIImage(named：“Picture”) 9 let imageView = UIImageView(image：image) 10 imageView.center = CGPoint(x：160, y：260) 11 self.view.addSubview(imageView) 12 13 let ciImage = CIImage(image：image！) 14 let ciContext：CIContext = { return CIContext(options：nil) }() 15 let ciDetector = CIDetector(ofType： CIDetectorTypeFace, context：ciContext, options： [CIDetectorAccuracy：CIDetectorAccuracyHigh]) 16 17 let ciImageSize = ciImage！.extent.size 18 var transform = CGAffineTransform.identity 19 transform = transform.scaledBy(x：1, y：-1) 20 transform = transform.translatedBy(x：0, y：- ciImageSize.height) 21 22 let features：[CIFeature]！= ciDetector！.features(in： ciImage！) 23 for feature in features 24 { 25 let frame = feature.bounds.applying(transform) 26 let faceView = UIView(frame：frame) 27 faceView.layer.borderWidth = 2 28 faceView.layer.borderColor = UIColor.white.cgColor 29 30 imageView.addSubview(faceView) 31 } 32 } 33 }