此代码没有显示在相机中检测到人脸，即使没有错误。 我希望在相机中实时检测到脸部，周围有红色的乡绅，但我认为我没有正确放置代码或者我应该在 Viewdidload 或其他地方放置一些东西？
import UIKit
import CoreImage
class ViewController: UIViewController ,UIAlertViewDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
@IBOutlet var imageView: UIImageView!
@IBAction func Moodify(_ sender: UIButton) {
func detect() {
guard let personciImage = CIImage(image: imageView.image!) else {
return
}
let accuracy = [CIDetectorAccuracy: CIDetectorAccuracyHigh]
let faceDetector = CIDetector(ofType: CIDetectorTypeFace, context: nil, options: accuracy)
let faces = faceDetector?.features(in: personciImage)
// For converting the Core Image Coordinates to UIView Coordinates
let ciImageSize = personciImage.extent.size
var transform = CGAffineTransform(scaleX: 1, y: -1)
transform = transform.translatedBy(x: 0, y: -ciImageSize.height)
for face in faces as! [CIFaceFeature] {
print("Found bounds are \(face.bounds)")
// Apply the transform to convert the coordinates
var faceViewBounds = face.bounds.applying(transform)
// Calculate the actual position and size of the rectangle in the image view
let viewSize = imageView.bounds.size
let scale = min(viewSize.width / ciImageSize.width,
viewSize.height / ciImageSize.height)
let offsetX = (viewSize.width - ciImageSize.width * scale) / 2
let offsetY = (viewSize.height - ciImageSize.height * scale) / 2
faceViewBounds = faceViewBounds.applying(CGAffineTransform(scaleX: scale, y: scale))
faceViewBounds.origin.x += offsetX
faceViewBounds.origin.y += offsetY
let faceBox = UIView(frame: faceViewBounds)
//let faceBox = UIView(frame: face.bounds)
faceBox.layer.borderWidth = 3
faceBox.layer.borderColor = UIColor.red.cgColor
faceBox.backgroundColor = UIColor.clear
imageView.addSubview(faceBox)
if face.hasLeftEyePosition {
print("Left eye bounds are \(face.leftEyePosition)")
}
if face.hasRightEyePosition {
print("Right eye bounds are \(face.rightEyePosition)")
}
}
}
let picker = UIImagePickerController()
picker.delegate = self
picker.allowsEditing = true
picker.sourceType = .camera
picker.cameraDevice = .front
self.present(picker, animated: true, completion: { _ in })
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [AnyHashable: Any]) {
let chosenImage = info[UIImagePickerControllerEditedImage]
self.imageView!.image = chosenImage as? UIImage
picker.dismiss(animated: true, completion: { _ in })
}
// picker.dismiss(animated: true, completion: { _ in })
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
picker.dismiss(animated: true, completion: { _ in })
}
}
override func viewDidLoad() {
let alert = UIAlertController(title: "Ooops!!!", message: "Camera is not connected", preferredStyle: UIAlertControllerStyle.alert)
alert.addAction(UIAlertAction(title: "Connect", style: UIAlertActionStyle.default, handler: nil))
self.present(alert, animated: true, completion: nil)
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
您很可能只需要按照文档中描述的方式触发函数
我们将调用 viewDidLoad 中的检测方法。所以在方法中插入如下代码行:
override func viewDidLoad() {
super.viewDidLoad()
detect()
}
编译并运行应用程序。
编辑: 这是解决方案，而函数“检测”是作为子类方法，但在您的情况下，您使用 IBAction，它具有类似这样的不同语法。您应该尝试删除函数名 detect() 和这个括号
}
let picker =
这部分必须在函数内部
let picker = UIImagePickerController()
picker.delegate = self
picker.allowsEditing = true
picker.sourceType = .camera
picker.cameraDevice = .front
self.present(picker, animated: true, completion: { _ in })
对于您的情况，您也可以省略这部分。
关于ios - 实时人脸检测不起作用，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/41238781/
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