无法从 UIDocumentPickerViewController 中选择文件

Question

我正在 Swift 中开发 UIDocumentPickerViewController() 。打开文档选择器后，文件和图像看起来很模糊，我无法选择其中任何一个。我已附上屏幕截图和下面的代码。知道为什么这些文件和图像不可选吗？

extension BecomeMuftiTwoVC: UIDocumentPickerDelegate {
    func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
        guard let selectedFilesURL = urls.first else {
            return
        }
        let dir = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
        let sandboxFileURL = dir.appendingPathComponent(selectedFilesURL.lastPathComponent)
        
        if FileManager.default.fileExists(atPath: sandboxFileURL.path) {
            print("Already File Exist")
        }
        else {
            
            do{
                try FileManager.default.copyItem(at: selectedFilesURL, to: sandboxFileURL)
                print("Copied Files")
            }
            catch{
                print("Files Are not exist ")
                
            }
        }
    }
}
//MARK: - Import File Btn Action
@IBAction func importFile(_ sender: Any) {
    let documentPicker = UIDocumentPickerViewController(documentTypes: [KUTTypedPlainText], in: .import)
    documentPicker.delegate = self
    documentPicker.allowsMultipleSelection = false
    present(documentPicker, animated: true, completion: nil)

Answer 1

你的线路

let documentPicker = UIDocumentPickerViewController(documentTypes: [KUTTypedPlainText], in: .import)

似乎只为纯文本文件初始化文档选择器。

试试这个：

let documentPicker = UIDocumentPickerViewController(documentTypes: [kUTTypeImage as String], in: .import)

另外，请小心，因为自 iOS14.0 以来，初始化程序

init(documentTypes:in:)

已被弃用。所以对于iOS14及以上版本，你应该使用：

let documentPicker = UIDocumentPickerViewController(forOpeningContentTypes: [.heic, .heif, .livePhoto, .image])