我一直在尝试从 swifui 应用程序的照片库中加载图像。我正在运行 Xcode 13.2.1 并构建 IOS 15.2 我的代码如下
@Binding var image: UIImage?
func makeUIViewController(context: Context) -> PHPickerViewController {
var config = PHPickerConfiguration()
config.filter = .images
config.selectionLimit = 1
config.preferredAssetRepresentationMode = .compatible
let controller = PHPickerViewController(configuration: config)
controller.delegate = context.coordinator
return controller
}
func updateUIViewController(_ uiViewController: PHPickerViewController, context: Context) { }
func makeCoordinator() -> Coordinator {
Coordinator(self)
}
// Use a Coordinator to act as your PHPickerViewControllerDelegate
class Coordinator: NSObject, PHPickerViewControllerDelegate {
private let parent: PhotoPicker
init(_ parent: PhotoPicker) {
self.parent = parent
}
func picker(_ picker: PHPickerViewController, didFinishPicking results: [PHPickerResult]) {
picker.dismiss(animated: true)
print(results)
guard !results.isEmpty else {
return
}
guard let itemProvider = results.first?.itemProvider else { return }
print("Invoking getPhoto")
self.getPhoto2(from: itemProvider)
//parent.didFinishPicking(!results.isEmpty)
}
private func getPhoto2(from itemProvider: NSItemProvider) {
print("getPhoto")
if itemProvider.canLoadObject(ofClass: UIImage.self) {
itemProvider.loadObject(ofClass: UIImage.self) { image, error in
self.parent.image = image as? UIImage
print("Loaded Image \(error)")
}
}
}
}
}
在控制台上，我看到以下错误
022-01-27 00:40:01.485085-0500 Vescense[3174:884964] [Picker] Showing picker unavailable UI (reason: still loading) with error: (null)
此外，当我打印我看到的结果时
[PhotosUI.PHPickerResult(itemProvider: <PUPhotosFileProviderItemProvider: 0x2818fc980> {types = (
"public.jpeg",
"public.heic"
)}, assetIdentifier: nil)]
它看起来不像 loadObject 上的错误有值。并且资产标识符为零是可疑的。
关于我可能在这里遗漏的任何想法都会很有帮助。
更新：
我尝试使用 loadFileRepresentation 代替。
itemProvider.loadFileRepresentation(forTypeIdentifier: UTType.jpeg.identifier) { (url, error) in
guard let url = url else {
print("Failed to load url")
return
}
这次我在控制台上收到以下错误。
Error copying file type public.jpeg. Error: Error Domain=NSItemProviderErrorDomain Code=-1000 "Cannot load representation of type public.jpeg" UserInfo={NSLocalizedDescription=Cannot load representation of type public.jpeg, NSUnderlyingError=0x600001d26430 {Error Domain=NSCocoaErrorDomain Code=4101 "Couldn’t communicate with a helper application." UserInfo={NSUnderlyingError=0x600001dbcb70 {Error Domain=PHAssetExportRequestErrorDomain Code=0 "The operation couldn’t be completed. (PHAssetExportRequestErrorDomain error 0.)" UserInfo={NSLocalizedDescription=The operation couldn’t be completed. (PHAssetExportRequestErrorDomain error 0.), NSUnderlyingError=0x600001dbca80 {Error Domain=PAMediaConversionServiceErrorDomain Code=2 "The operation couldn’t be completed. (PAMediaConversionServiceErrorDomain error 2.)" UserInfo=0x600001398e60 (not displayed)}}}}}}