swift - Cocoa/Swift 3.0 替换 NSNumberFormatter.isPartialStringValid

Question

在 macOS 的 Swift Cocoa 应用程序中，我继承自 NSNumberFormatter 并覆盖了 isPartialStringValid。迁移到 Swift 3.0 后，我现在必须将 NumberFormatter 子类化，但出现错误“方法未覆盖其父类(super class)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 的子类中键入 isPartialS... 时，Xcode 提示如下:

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

似乎您的方法 header 有无关的 AutoreleasingUnsafeMutablePointer。