swift - 无法将类型 '[String : Date]' 的值转换为预期的参数类型 '[FileAttributeKey : Any]?'

Question

当我将代码更新为 swift 4 时出现此错误，我该如何解决？ ERROR SCREEN SHOT

      let fullPath = destination.appendingPathComponent(pathString).path

        let creationDate = Date()
        let directoryAttributes = [FileAttributeKey.creationDate.rawValue : creationDate,
                                   FileAttributeKey.modificationDate.rawValue : creationDate]
        do {
if isDirectory {
                try fileManager.createDirectory(atPath: fullPath, withIntermediateDirectories: true, attributes: directoryAttributes )
            }

            else {
                let parentDirectory = (fullPath as NSString).deletingLastPathComponent
                try fileManager.createDirectory(atPath: parentDirectory, withIntermediateDirectories: true, attributes: directoryAttributes)
            }

错误:

Cannot convert value of type '[String : Date]' to expected argument type '[FileAttributeKey : Any]?'

其他线路

    let options: [String: Any] = [
        NSAttributedString.DocumentAttributeKey.documentType.rawValue: NSAttributedString.DocumentType.html,
        NSAttributedString.DocumentAttributeKey.characterEncoding.rawValue: NSNumber(value: String.Encoding.utf8.rawValue)
    ]
    try self.init(data: data, options: options, documentAttributes: nil)
  }

又是这个错误

Cannot convert value of type '[String : Any]' to expected argument type '[NSAttributedString.DocumentReadingOptionKey : Any]'

和其他行

 let opt = [
         NSAttributedString.DocumentAttributeKey.documentType.rawValue: NSAttributedString.DocumentType.html,
         NSAttributedString.DocumentAttributeKey.characterEncoding: String.Encoding.utf8
         ] as! [String : Any]

         let data = string.data(using: String.Encoding.utf8)!
         returnString = try! NSMutableAttributedString(data:data,options:opt as [String:AnyObject],documentAttributes:nil)

    }

错误

Cannot convert value of type '[String : Any]' to type '[String : AnyObject]' in coercion

Answer 1

不要使用 rawValue。按原样使用字典中的键:

let directoryAttributes = [
    FileAttributeKey.creationDate : creationDate,
    FileAttributeKey.modificationDate : creationDate
]

另一个:

let opt: [NSAttributedString.DocumentReadingOptionKey: Any] = [
    .documentType: NSAttributedString.DocumentType.html,
    .characterEncoding: String.Encoding.utf8.rawValue
]

不要在键上使用 rawValue(尽管如 Leo 在评论中所展示的那样，您确实需要它作为 utf8 值)。并确保您的键和值的类型正确。并阅读错误信息。它会告诉您问题出在哪里。

你还需要改变:

returnString = try! NSMutableAttributedString(data:data,options:opt as [String:AnyObject],documentAttributes:nil)

到:

returnString = try! NSMutableAttributedString(data: data, options:opt, documentAttributes: nil)

不要不必要地转换，尤其是错误的类型。