ios - iOS 11 中的照片捕获权限问题

Question

所以这是我的问题。我正在尝试创建一个屏幕，其中有一个 UIImageView 和一个 UIButton。当用户按下按钮时，相机应用程序打开，您拍摄一张照片，如果您在相机应用程序中按下“使用照片”，您将返回到我的应用程序屏幕，照片将放置在我之前提到的 UIImageView 中。

目前发生的情况是，当我按下“使用照片”按钮时，图像已正确放置在我的 UIImageView 中，但随后应用程序崩溃并出现以下错误:

此应用已崩溃，因为它试图在没有使用说明的情况下访问隐私敏感数据。应用的 Info.plist 必须包含一个 NSPhotoLibraryAddUsageDescription 键和一个向用户解释应用如何使用此数据的字符串值。

到目前为止我所做的是:

1. 将键“Privacy - Photo Library Usage Description”和值“$(PRODUCT_NAME) 使用 Library 以处理您拍摄的照片”放在一起。在 Info.plist 文件中(还检查了它是如何以源代码形式编写的，并且根据 Apple Developer Documentation 它是正确的)。

2. 还在 Info.plist 文件中放置值为“$(PRODUCT_NAME) 使用相机”的键“Privacy - Camera Usage Description”。

3. 在“TARGETS->->Info->Custom iOS Target Properties”下检查，我在步骤 1 和 2 中提到的 2 个键/值对存在。

到目前为止，我将为您提供我的代码:

import UIKit
import Vision
import MobileCoreServices
import AVFoundation
import Photos

class ViewController: UIViewController, UIImagePickerControllerDelegate, 
UINavigationControllerDelegate {

var newMedia: Bool?

@IBAction func captureImageButtonPressed(_ sender: Any) {
    //let imageName : String = "dolphin"
    //randomImageView.image = UIImage.init(named:imageName)

    if UIImagePickerController.isSourceTypeAvailable(
        UIImagePickerControllerSourceType.camera) {

        let imagePicker = UIImagePickerController()

        imagePicker.delegate = self
        imagePicker.sourceType =
            UIImagePickerControllerSourceType.camera
        imagePicker.mediaTypes = [kUTTypeImage as String]
        imagePicker.allowsEditing = false

        self.present(imagePicker, animated: true,
                     completion: nil)
        newMedia = true
    }
}

@IBAction func classifyButtonPressed(_ sender: UIButton) {
    performVisionRequest()
}
@IBOutlet weak var randomImageView: UIImageView!
@IBOutlet weak var classificationLabel: UILabel!

override func viewDidLoad() {
    super.viewDidLoad()
}

override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()
}

func performVisionRequest() {
    let start = DispatchTime.now()
    let model = Resnet50()
    let request = VNImageRequestHandler(cgImage: randomImageView.image!.cgImage!, options: [:])
    do {
        let m = try VNCoreMLModel(for: model.model)
        let coreMLRequest = VNCoreMLRequest(model: m) { (request, error) in
            guard let observation = request.results?.first as? VNClassificationObservation else { return }
            let stop = DispatchTime.now()
            let nanoTime = stop.uptimeNanoseconds - start.uptimeNanoseconds
            let timeInterval = Double(nanoTime)
            self.classificationLabel.text = "\(observation.identifier) (\(observation.confidence * 100)%) in \(timeInterval) seconds."
        }
        try request.perform([coreMLRequest])
    } catch {
        print(error)
    }
}

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    let mediaType = info[UIImagePickerControllerMediaType] as! NSString
    self.dismiss(animated: true, completion: nil)
    if mediaType.isEqual(to: kUTTypeImage as String) {
        let image = info[UIImagePickerControllerOriginalImage]
            as! UIImage
        randomImageView.image = image
        if (newMedia == true) {
            UIImageWriteToSavedPhotosAlbum(image, self,
                                           #selector(ViewController.image(image:didFinishSavingWithError:contextInfo:)), nil)
        } else if mediaType.isEqual(to: kUTTypeMovie as String) {
            // Code to support video here
        }
    }
}

@objc func image(image: UIImage, didFinishSavingWithError error: NSErrorPointer, contextInfo:UnsafeRawPointer) {
    if error != nil {
        let alert = UIAlertController(title: "Save Failed",
                                      message: "Failed to save image",
                                      preferredStyle: UIAlertControllerStyle.alert)
        let cancelAction = UIAlertAction(title: "OK",
                                         style: .cancel, handler: nil)
        alert.addAction(cancelAction)
        self.present(alert, animated: true,
                     completion: nil)
    }
}

func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
    self.dismiss(animated: true, completion: nil)
}
}

知道为什么我会以粗体显示上述错误吗？非常感谢您抽出宝贵时间。

Answer 1

NSPhotoLibraryAddUsageDescription 是在 iOS 11 中添加的。

请在 info.plist 中添加“Privacy - Photo Library Additions Usage Description”和使用说明(字符串)，就像您为其他隐私权限所做的那样。

引用:https://developer.apple.com/library/content/documentation/General/Reference/InfoPlistKeyReference/Articles/CocoaKeys.html