在swift中使用UIDocumentPickerViewController(documentTypes:)

Question

在我的代码中使用UIDocumentPickerViewConroller选择应用程序中的音频文件时，出现此错误，并且我找不到(documentTypes: )at UIDocumentPickerViewController。

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 @IBAction func AddMusic(_ sender: UIButton) {
        let documentPicker = UIDocumentPickerViewController(documentTypes: [kUTTypeAudio as String], in: .import)
        documentPicker.delegate = self
        documentPicker.allowsMultipleSelection = false
        present(documentPicker, animated: true, completion: nil)
    }
    
}

extension ViewController: UIDocumentPickerDelegate{
    func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]){
        
    }
}

Answer 1

UIDocumentPickerViewController(documentTypes: String，in: UIDocumentPickerMode)在iOS 14.0中已弃用

该方法被替换为UIDocumentPickerViewController(forOpeningContentTypes contentTypes: UTType，asCopy: Bool)方法

首先，您需要导入UniformTypeIdentifiers

import UniformTypeIdentifiers

因此，您可以按如下方式使用它

let supportedTypes: [UTType] = [UTType.audio]
let pickerViewController = UIDocumentPickerViewController(forOpeningContentTypes: supportedTypes, asCopy: true)
pickerViewController.delegate = self
pickerViewController.allowsMultipleSelection = false
pickerViewController.shouldShowFileExtensions = true
self.present(pickerViewController, animated: true, completion: nil)