NSNumberFormatter.isPartialStringValid 的 Cocoa/Swift 3.0 替代品

Question

在 macOS 的 Swift Cocoa 应用程序中，我从 NSNumberFormatter 继承并覆盖了 isPartialStringValid。迁移到 Swift 3.0 后，我现在必须继承 NumberFormatter 并且我收到错误“方法不会覆盖其超类中的任何方法”。我可以用什么来代替这个方法？

override func isPartialStringValid(_ partialString: String, newEditingString newString: AutoreleasingUnsafeMutablePointer<AutoreleasingUnsafeMutablePointer<NSString?>>?, errorDescription error: AutoreleasingUnsafeMutablePointer<AutoreleasingUnsafeMutablePointer<NSString?>>?) -> Bool { ... }

Answer 1

当我在NumberFormatter 的子类中输入isPartialS... 时，Xcode 建议这样做：

override func isPartialStringValid(_ partialString: String,
                                   newEditingString newString: AutoreleasingUnsafeMutablePointer<NSString?>?,
                                   errorDescription error: AutoreleasingUnsafeMutablePointer<NSString?>?) -> Bool {
    //...
}

您的方法标头似乎有多余的AutoreleasingUnsafeMutablePointer。