人脸的VNDetectFaceRectanglesRequest检测

import Vision

#import <Vision/Vision.h>

let request = VNDetectFaceRectanglesRequest { (request, error) in
    // 处理结果
}

if let image = UIImage(named: "your_image_name") {
    let ciImage = CIImage(cgImage: image.cgImage!)
    let handler = VNImageRequestHandler(ciImage: ciImage, options: [:])
}

do {
    try handler.perform([request])
} catch {
    print(error)
}

request completionHandler: { (request, error) in
    guard let observations = request.results as? [VNFaceObservation] else { return }
    
    for faceObservation in observations {
        let faceRectangle = faceObservation.boundingBox
        // 处理人脸矩形边界
        print("Face rectangle: \(faceRectangle)")
    }
}

import UIKit
import Vision

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        if let image = UIImage(named: "your_image_name") {
            detectFaces(in: image)
        }
    }
    
    func detectFaces(in image: UIImage) {
        guard let ciImage = CIImage(cgImage: image.cgImage!) else { return }
        
        let request = VNDetectFaceRectanglesRequest { (request, error) in
            guard let observations = request.results as? [VNFaceObservation] else { return }
            
            for faceObservation in observations {
                let faceRectangle = faceObservation.boundingBox
                // 处理人脸矩形边界
                print("Face rectangle: \(faceRectangle)")
            }
        }
        
        let handler = VNImageRequestHandler(ciImage: ciImage, options: [:])
        
        do {
            try handler.perform([request])
        } catch {
            print(error)
        }
    }
}