Почему PHContentEditingInput.fullSizeImageURL возвращает ноль - PullRequest
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Почему PHContentEditingInput.fullSizeImageURL возвращает ноль

0 голосов
/ 09 апреля 2020

Я запрашиваю объект PHContentEditingInput, используя метод requestContentEditingInput. Я вижу, что возвращаемый объект содержит непустое приватное поле _fullSizeImageURL

enter image description here

Однако fullSizeImageURL свойство getter возвращает nil. 

let url = contentEditingInput!.fullSizeImageURL   // fullSizeImageURL is nil

Обновление: Вот полный пример кода, воспроизводящий проблему: 

var assetId: String? = nil
//Changes for the Photos Library must be maded within the performChanges block

PHPhotoLibrary.shared()
    .performChanges({

        //This will request a PHAsset be created for the UIImage
        let creationRequest = PHAssetCreationRequest.creationRequestForAsset(from: image)

        //Create a change request to insert the new PHAsset in the collection
        let request = PHAssetCollectionChangeRequest(for: collection)

        //Add the PHAsset placeholder into the creation request.
        //The placeholder is used because the actual PHAsset hasn't been created yet
        if request != nil && creationRequest.placeholderForCreatedAsset != nil {
            request!.addAssets([creationRequest.placeholderForCreatedAsset!] as NSFastEnumeration)
        }

        assetId = creationRequest.placeholderForCreatedAsset?.localIdentifier

    }, completionHandler: { (success: Bool, error: Error?) in
        let fetchResult = PHAsset.fetchAssets(withLocalIdentifiers: [assetId!], options: nil)

        fetchResult.enumerateObjects({ (asset: PHAsset, _, _) in
            asset.requestContentEditingInput(with: PHContentEditingInputRequestOptions()) { (input, _) in
                let url = input!.fullSizeImageURL
                // **Returned url is nil, while private field input._fullSizeImageURL is NOT empty as shown on the screenshot above.**
            }
        })        
    }
)
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