Swift将我自己的类型的值添加到集合中
示例
为了定义Set您自己的类型，您需要使您的类型符合Hashable
struct Starship: Hashable {
let name: String
var hashValue: Int { returnname.hashValue}
}
func ==(left:Starship, right: Starship) -> Bool {
returnleft.name== right.name
}现在，您可以创建Set的Starship(s)
let ships : Set<Starship> = [Starship(name:"Enterprise D"), Starship(name:"Voyager"), Starship(name:"Defiant") ]