Swift URL appendPathComponent(_：) 已弃用

替代的是append(path:directoryHint:)美元.

如果您使用Xcode的代码完成功能，您可以清楚地看到这一点.键入类似以下内容:

someUrl.append

而Xcode则显示了可能的匹配列表.它将显示已弃用的方法，并提到替换方法.

另一种 Select 是在代码中右击appendPathComponent的用法，然后 Select "跳转到定义".这将把您带到Foundation.URL的接口文件，您将在其中看到类似以下内容:

/// Appends a path component to the URL.
///
/// - note: This function performs a file system operation to determine if the path component is a directory. If so, it will append a trailing `/`. If you know in advance that the path component is a directory or not, then use `func appendingPathComponent(_:isDirectory:)`.
/// - parameter pathComponent: The path component to add.
@available(macOS, introduced: 10.9, deprecated: 100000.0, message: "Use append(path:directoryHint:) instead")
@available(iOS, introduced: 7.0, deprecated: 100000.0, message: "Use append(path:directoryHint:) instead")
@available(tvOS, introduced: 9.0, deprecated: 100000.0, message: "Use append(path:directoryHint:) instead")
@available(watchOS, introduced: 2.0, deprecated: 100000.0, message: "Use append(path:directoryHint:) instead")
public mutating func appendPathComponent(_ pathComponent: String)

这@available行显示的是替换项.这就是Xcode展示替代产品的方式.不知道为什么在线文档和Xcode的开发人员文档窗口没有显示替代版本.