在 Xcode 版本 12.0.1 中使用 UIImagePickerController 时，我最近遇到了这个错误。
[相机] 无法读取曝光补偿字典：错误域=NSCocoaErrorDomain Code=4864 "*** -[NSKeyedUnarchiver _initForReadingFromData:error:throwLegacyExceptions:]: data is NULL" UserInfo={NSDebugDescription=*** -[NSKeyedUnarchiver _initForReadingFromData:error:throwLegacyExceptions:]: data is NULL}
有没有其他人也遇到过这个错误？如何修复它？
imagePicker.allowsEditing = true，则必须使用以下方式获取图像：if let pickedImage = info[UIImagePickerController.InfoKey.editedImage] as? UIImage {
capturedImage = pickedImage
}
imagePicker.allowsEditing = false，则使用以下内容来选择图片：if let pickedImage = info[UIImagePickerController.InfoKey.originalImage] as? UIImage {
capturedImage = pickedImage
}
如果您不遵循这个组合，您可能会收到此错误。
Info.plist中添加此权限使所有差异消失，并使该错误消失：
<key>LSSupportsOpeningDocumentsInPlace</key> <true/>
AVKit而不是AVFoundation，并尝试在本机录制视图中显示视频。这给了我一个异常，告诉我要将NSMicrophoneUsageDescription添加到info.plist文件中，之后，我能够在自定义视图中显示实时视频。import AVKit
import MobileCoreServices
@IBOutlet weak var videoViewContainer: UIView!
private let imagePickerController = UIImagePickerController()
override func viewDidLoad() {
super.viewDidLoad()
initCameraView()
}
func initCameraView() {
// Device setup
imagePickerController.delegate = self
imagePickerController.sourceType = .camera
imagePickerController.mediaTypes = [kUTTypeMovie as String]
imagePickerController.cameraCaptureMode = .video
imagePickerController.cameraDevice = .rear
// UI setup
addChild(imagePickerController)
videoViewContainer.addSubview(imagePickerController.view)
imagePickerController.view.frame = videoViewContainer.bounds
imagePickerController.allowsEditing = false
imagePickerController.showsCameraControls = false
imagePickerController.view.autoresizingMask = [.flexibleWidth, .flexibleHeight]
}
然后在info.plist文件中添加NSMicrophoneUsageDescription的说明：
希望这对你也有用！
[access] This app has crashed because it attempted to access privacy-sensitive data without a usage description. The app's Info.plist must contain an NSCameraUsageDescription key with a string value explaining to the user how the app uses this data.
然后您需要将此添加到您的info.plist字典中：
<key>NSCameraUsageDescription</key>
<string>so you can choose a photo or take a picture for object detection</string>
它为我解决了这个问题
Info.plist 键，即 NSCameraUsageDescription。
您应该输入使用相机的目的作为描述。
这为我解决了崩溃问题。
此外，如果您不提供目的，您的应用程序很可能会被拒绝。当我尝试从无法复制的URL复制时，出现了这个错误。这个URL来自于UIImagePickerControllerDelegate中的mediaURL。
基本上，我所做的就是使用UISaveVideoAtPathToSavedPhotosAlbum。
就像这个例子⤵️中所示：
if UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(url.absoluteString) {
UISaveVideoAtPathToSavedPhotosAlbum(url.absoluteString, self, #selector(self.didSaveVideo), nil)
} else {
return /* do something*/
}
@objc private func didSaveVideo(videoPath: String, error: NSError, contextInfo: Any) {}
我在使用Xcode 12和iOS 14时遇到了相同的错误。
但是在我的情况下，我在之前使用了ActionSheet来选择相机或照片库。所以我改为在关闭ActionSheet后立即打开相机，现在它可以正常工作。
希望这对你的问题有所帮助。
enum MediaOptions: Int {
case Photos
case Camera
}
func selectImage(mediaType: MediaOptions) {
self.mediaOption = mediaType
let iPicker = UIImagePickerController()
iPicker.delegate = self
iPicker.allowsEditing = false
if mediaType == .Camera {
if UIImagePickerController.isSourceTypeAvailable(.camera) {
iPicker.sourceType = .camera
iPicker.allowsEditing = true
}
} else {
iPicker.sourceType = .photoLibrary
}
self.present(iPicker, animated: true, completion: nil)
self.imagePicker = iPicker
}
func choosePhoto() {
let actionSheet = UIAlertController(title: "Choose", message: "", preferredStyle: .actionSheet)
if UIImagePickerController.isSourceTypeAvailable(.camera) {
actionSheet.addAction(UIAlertAction(title: "Camera", style: .default, handler: { (action) -> Void in
actionSheet.dismiss(animated: true) {
self.selectImage(mediaType: .Camera) // Just moved here - inside the dismiss callback
}
}))
}
if UIImagePickerController.isSourceTypeAvailable(.photoLibrary) {
actionSheet.addAction(UIAlertAction(title: "Photo Library", style: .default, handler: { (action) -> Void in
self.selectImage(mediaType: .Photos)
}))
}
actionSheet.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
self.present(actionSheet, animated: true, completion: nil)
}
当imagePicker的source type为相机时，我在Xcode 12和iOS 14中发现了相同的错误。
但是应用程序正常工作，我可以使用相机拍照并将其放入我的集合视图单元格中。因此，可能是Xcode 12上的某些问题吧。
@objc func addPerson() {
let picker = UIImagePickerController()
if UIImagePickerController.isSourceTypeAvailable(.camera) {
picker.sourceType = .camera
} else {
fatalError("Camera is not available, please use real device.")
}
picker.allowsEditing = true
picker.delegate = self
present(picker, animated: true)
}