Question

将代码从Swift 1更改为2，

错误：输入＆＃39; NSDirectoryEnumeration选项＆＃39;不符合协议＆＃39; NilLiteralConvertible＆＃39;在下面的第6行：

    override func viewDidAppear(animated: Bool) {
       super.viewDidAppear(animated)

          if let directoryURL = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)[0] as? NSURL {

          let urls = try! NSFileManager.defaultManager().contentsOfDirectoryAtURL(directoryURL, includingPropertiesForKeys: nil, options: nil 
       }
     }

Answer 1

没有选项

let enumerator = manager.enumeratorAtURL(url, includingPropertiesForKeys: keys, options: [], errorHandler: nil)

只有一个选项

let enumerator = manager.enumeratorAtURL(url, includingPropertiesForKeys: keys, options: .SkipsHiddenFiles, errorHandler: nil)

多个选项

let options: NSDirectoryEnumerationOptions = [.SkipsHiddenFiles, .SkipsPackageDescendants]
let enumerator = manager.enumeratorAtURL(url, includingPropertiesForKeys: keys, options: options, errorHandler: nil)

资源（由@Marc回答）： Issue with returning a Directory Enumerator from NSFileManager using enumeratorAtUrl in Swift

将代码从Swift 1更改为2，错误：键入＆＃39; NSDirectoryEnumeration选项＆＃39;不符合协议＆＃39; NilLiteralConvertible＆＃39;

1 个答案: