图片库不可访问，只有相机选项可用swift代码

import UIKit
import AVFoundation

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    
    var imagePicker: UIImagePickerController!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 检查设备是否支持相机
        if UIImagePickerController.isSourceTypeAvailable(.camera) {
            imagePicker = UIImagePickerController()
            imagePicker.delegate = self
            imagePicker.sourceType = .camera
            imagePicker.allowsEditing = false
        } else {
            // 设备不支持相机
            print("设备不支持相机")
        }
    }
    
    // 打开相机
    func openCamera() {
        present(imagePicker, animated: true, completion: nil)
    }
    
    // 拍摄完成后的回调方法
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        if let pickedImage = info[.originalImage] as? UIImage {
            // 处理拍摄的照片
            // ...
        }
        
        dismiss(animated: true, completion: nil)
    }
    
    // 拍摄取消后的回调方法
    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        dismiss(animated: true, completion: nil)
    }
}