代码：
enum ContactType{ case Invalid case Special // special for Add/Remove/… items case Person //single person case Group //a group case Topic //a topic } class ContactItem:NSObject, NSCoding { var type:ContactType override init(){ type = ContactType.Invalid super.init() } // MARK: NSCoding private let codingKey_type = "ContactItem_type" required init?(coder aDecoder: NSCoder){ self.type = aDecoder.decodeObjectForKey(codingKey_type) as! ContactType super.init() } func encodeWithCoder(aCoder: NSCoder){ aCoder.encodeObject(type, forKey: codingKey_type) } } |
出错：
Cannot convert value of type ‘ContactType’ to expected argument type ‘AnyObject?’
如图：
搜：
swift enum encodeObject Cannot convert value
swift enum encodeObject
ios – Encode/Decode enum for Swift (Xcode 6.1) – Stack Overflow
Simple NSCoding with Swift example, using enum & rawValue for the key names.
How do I encode enum using NSCoder in swift? – Stack Overflow
Encode/decode enums using NSCoder methods | petosoft
NSCoder and Swift structs and enums | Apple Developer Forums
Introducing Protocol-Oriented Programming in Swift 2 – Ray Wenderlich
Archiving and unarchiving structs, enums and ot… | Apple Developer Forums
Serializing generic structs | Apple Developer Forums
好像没法去coding这样：
enum ContactType{ case Invalid case Special // special for Add/Remove/… items case Person //single person case Group //a group case Topic //a topic } |
的enum
感觉是：
必须让enum去继承某种类型，比如String，Int之类的。
此处加上String，然后就可以encode了：
enum ContactType:String{ case Invalid case Special // special for Add/Remove/… items case Person //single person case Group //a group case Topic //a topic } class ContactItem:NSObject, NSCoding { var type:ContactType func encodeWithCoder(aCoder: NSCoder){ aCoder.encodeObject(type.rawValue, forKey: codingKey_type) } } |
［后记 2016-01-14］
后来：
［已解决］swift中枚举值decodeObjectForKey失败
中发现，之前的：
self.personType = aDecoder.decodeObjectForKey(codingKey_personType) as! PersonType |
是错误的。
应该改为：
let rawPersonTypeStr = aDecoder.decodeObjectForKey(codingKey_personType) as! String //"Colleague" self.personType = PersonType(rawValue: rawPersonTypeStr)! //JianDao.PersonType.Colleague |
即：
self.personType = PersonType(rawValue: aDecoder.decodeObjectForKey(codingKey_personType) as! String)! |
才可以正常解码。