ImagePicker 错误：错误域=PlugInKit 代码=13

Question

尝试使用照片库/相机中的图像更新 UIImageView。 似乎与访问相机/照片库的权限有关的一些错误

完全错误：发现] 发现扩展时遇到的错误：Error Domain=PlugInKit Code=13 "query cancelled" UserInfo={NSLocalizedDescription=query cancelled}

import Photos
import UIKit
import MapKit

class detailViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

var selectedName: String?
var selectedImage: UIImage?
var selectedText: String?

@IBOutlet weak var cityName: UILabel!
@IBOutlet weak var cityImage: UIImageView!
@IBOutlet weak var cText: UILabel!

@IBOutlet weak var map: MKMapView!
@IBOutlet weak var lat: UILabel!
@IBOutlet weak var lon: UILabel!

@IBOutlet weak var searchText: UITextField!

@IBOutlet weak var img_view: UIImageView!

let imagePickerController = UIImagePickerController()

override func viewDidLoad() {
    super.viewDidLoad()
    self.cityName.text = selectedName!
    self.cityImage.image = selectedImage!
    self.cText.text = selectedText!

    imagePickerController.delegate = self

}
var picker = UIImagePickerController()

@IBAction func pickButton(_ sender: UIButton) {
checkPermission()
    let alert = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
    alert.addAction(UIAlertAction(title: "Take Photo", style: .default, handler: { _ in
        self.camera()
    }))

    alert.addAction(UIAlertAction(title: "Select Photo", style: .default, handler: { _ in
        self.gallery()
    }))

    alert.addAction(UIAlertAction.init(title: "Cancel", style: .cancel, handler: nil))

    self.present(alert, animated: true, completion: nil)
}

func camera(){
    if(UIImagePickerController .isSourceTypeAvailable(UIImagePickerControllerSourceType.camera)){
        picker.sourceType = UIImagePickerControllerSourceType.camera
        picker.allowsEditing = true
        picker.delegate = self
        self.present(picker, animated: true, completion: nil)
    }
    else{
        let alert  = UIAlertController(title: "Warning", message: "You don't have camera", preferredStyle: .alert)
        alert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
        self.present(alert, animated: true, completion: nil)
    }
}

func gallery(){
    picker.sourceType = UIImagePickerControllerSourceType.photoLibrary
    picker.allowsEditing = true
    picker.delegate = self
    self.present(picker, animated: true, completion: nil)
}

func checkPermission() {
        let photoAuthorizationStatus = PHPhotoLibrary.authorizationStatus()
        switch photoAuthorizationStatus {
        case .authorized:
            print("Access is granted by user")
        case .notDetermined:
            PHPhotoLibrary.requestAuthorization({
                (newStatus) in
                print("status is \(newStatus)")
                if newStatus ==  PHAuthorizationStatus.authorized {

                    print("success")
                }
            })
            print("It is not determined until now")
        case .restricted:
            print("User do not have access to photo album.")
        case .denied:
            print("User has denied the permission.")
        }
    }



}

Answer 1

我不确定产生错误的 PlugInKit 是什么，但如果它试图访问任何照片/相机，它很可能会出现问题，因为您从未真正检查过用户是否有权访问相机或照片库.

您已经定义了 checkPermission 方法（通常您已将其嵌套在您的 viewDidLoad() 中），但您从未真正使用过它。

在尝试访问照片资源之前，您需要重新构建代码以实际检查权限。

您还需要注意PHPhotoLibrary.requestAuthorization() 会立即返回。如果您已经拥有权限，那很好，但如果您需要被授予权限，您将需要管理它的异步性质。使用完成处理程序来控制后续操作，但请注意，该块可以在后台线程上运行，因此您需要将任何 UI 工作强制到主线程上。