我正在尝试使用自定义对象创建一个 Set。这是有效的,如果我使用一组自定义对象,则没有重复项:
public class AttributesGroup: Hashable, Equatable, Comparable {
open var id: Int!
open var name: String!
open var position: Int!
public init (id: Int = 0, name: String = "", position: Int = 0) {
self.id = id
self.name = name
self.position = position
}
open var hashValue: Int {
get {
return id.hashValue
}
}
public static func ==(lhs: AttributesGroup, rhs: AttributesGroup) -> Bool {
return lhs.id == rhs.id
}
public static func < (lhs: AttributesGroup, rhs:AttributesGroup) -> Bool {
return lhs.position < rhs.position
}
}
我用 NSObject 扩展了我的类,因为 NSObject 已经实现了 Hashable 协议(以及 Equatable)我必须重写 hashValue,这不再起作用,如果我使用一组我的自定义对象有重复,我在这里做错了什么? :
public class AttributesGroup: NSObject, Comparable {
open var id: Int!
open var name: String!
open var position: Int!
public init (id: Int = 0, name: String = "", position: Int = 0) {
self.id = id
self.name = name
self.position = position
}
open override var hashValue: Int {
get {
return id.hashValue
}
}
public static func ==(lhs: AttributesGroup, rhs: AttributesGroup) -> Bool {
return lhs.id == rhs.id
}
public static func < (lhs: AttributesGroup, rhs:AttributesGroup) -> Bool {
return lhs.position < rhs.position
}
}
谢谢你的帮助 !