Swift 2.2，包含方法不起作用 [英] Swift 2.2, Contains Method not working

问题描述

包含方法无法正常工作，即使它与Object匹配也给我错误的结果吗?

Contains method not working properly and it is giving me false result even if it is matching with Object?

我的代码在下方

class Generic: NSObject, NSCoding
{

  var genericCode: String?
  var genericName : String?
  var genericType : String?
  var genericImageUrl : String?
  var genericPhone: String?
  var orgName : String?

  override init()
  {

    self.genericCode = String("")
    self.genericName = String("")
    self.genericType = String("")
    self.genericImageUrl = String("")
    self.genericPhone = String("")
    self.orgName = String("")

  }

  //Parameterzed Constructor for the Generic
  init(genericCode: String , genericName: String , genericPhone: String, genericType: String, genericImageUrl : String)
  {
    self.genericCode = genericCode
    self.genericName = genericName
    self.genericType = genericType
    self.genericImageUrl = genericImageUrl
    self.genericPhone = genericPhone

  }

  required init(coder aDecoder: NSCoder) {
    genericCode = aDecoder.decodeObjectForKey("genericCode") as? String
    genericName = aDecoder.decodeObjectForKey("genericName") as? String
    genericType = aDecoder.decodeObjectForKey("genericType") as? String
    genericPhone = aDecoder.decodeObjectForKey("genericPhone") as? String
  }

  func encodeWithCoder(aCoder: NSCoder) {
    aCoder.encodeObject(genericCode, forKey: "genericCode")
    aCoder.encodeObject(genericName, forKey: "genericName")
    aCoder.encodeObject(genericType, forKey: "genericType")
    aCoder.encodeObject(genericPhone, forKey: "genericPhone")
  }
}

func ==(lhs: Generic, rhs: Generic) -> Bool
{
  return lhs.genericCode == rhs.genericCode
}

签入ViewController

print(readArray.contains(generic))
if !readArray.contains(generic)
{
            readArray.append(generic)
}

推荐答案

选项1

原因是您的类是从NSObject继承的，因此，您必须实现NSObjectProtocol而不是Equatable:

The reason is that your class is inheriting from NSObject, therefore, you must fulfill the NSObjectProtocol instead of Equatable:

override func isEqual(object: AnyObject?) -> Bool {
     if let object = object as? Generic {
         return self.genericCode == object.genericCode
     }
     return false
 }

选项2

从Equatable而不是NSObject继承(您可能无法使用此选项，因为您似乎需要NSCoding)

Inherit from Equatable instead of NSObject (you probably can't use this option, since you seem to need NSCoding)

请注意，对于较新版本的Swift，您可能应该使用 选项3:使用Codable代替NSCodable

Note that with newer versions of Swift you probably should use OPTION 3: Use Codable instead of NSCodable

这篇关于Swift 2.2，包含方法不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！