符合Swift NSObject子类的Objective-C协议的问题

问题描述：

这段代码在Swift 1.1中绝对正常。

This piece of code works absolutely fine in Swift 1.1

// Obj-C

@import Foundation;

@protocol HashableObject <NSObject>
- (NSUInteger)hash;
@end

// Swift

import Foundation

@objc class Object: NSObject, HashableObject {

    func hash() -> UInt {
        return 0
    }
}

然而，在最新的Swift 1.2和XCode 6.3beta2编译器抱怨方法'hash（）'覆盖来自超类'NSObject'的Objective-C方法'hash'

However, in latest Swift 1.2 and XCode 6.3beta2 the compiler complains that Method 'hash()' overrides Objective-C method 'hash' from superclass 'NSObject'

这是一个错误，还是其他一些根本改变了，代码错了？这有什么变通方法吗？我的代码中有很多东西需要符合Objective-C库中的某些协议，除了等待下一个Swift版本之外，这基本上没有明显的解决方案。

Is that a bug, or something else has fundamentally changed and the code is wrong? Are there any workarounds to this? I have numerous things in my code that need to conform to certain protocols from Objective-C libraries and this essentially breaks everything with no apparent solution other than wait for the next Swift release.

答

在Swift 1.2（Xcode 6.3 beta 2）中，你可以覆盖的哈希属性 > NSObject作为计算属性：

In Swift 1.2 (Xcode 6.3 beta 2) you can override the hash property of NSObject as a computed property:

class Object: NSObject {
    override var hash: Int {
        return 0
    }
}

符合Swift NSObject子类的Objective-C协议的问题

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