ios - 删除具有重复键的对象

Question

我的代码...

class Inbox {

    var user = "name"
    var pmsg = "label"
    var match = ""
    var resim = "photo"
    var userID = ""
    var distance = ""
    var updated = ""
    var isAttendingNow = ""
    var isAttendingNowText = ""


    init(user : String, pmsg: String, match: String, resim: String, userID : String, distance: String, updated: String, isAttendingNow: String, isAttendingNowText: String) {

      self.user = user
      self.pmsg = pmsg
        self.match = match
        self.resim = resim
        self.userID = userID
        self.distance = distance
        self.updated = updated
        self.isAttendingNow = isAttendingNow
        self.isAttendingNowText = isAttendingNowText

    }


}

var arrayOfRels: [Inbox] = [Inbox]()

我的目标是删除 userID 键的重复项。

我怎样才能实现这一目标？

Answer 1

您可以使用一组来确定哪些 useID 是唯一的:

func filteredRels(source [Inbox]) -> [Inbox] {
   var keys: Set<String> = []
   return source.filter {
      if keys.contains($0.userID) {
        return false 
      } else {
        keys.insert($0.userID)
        return true
      }
   }
}

(在编辑器中被删除，因此可能需要一些小的清理。)