ios - How to save any class in NSUserDefaults -

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• saving array using nsuserdefaults crashes app 1 answer
• how store custom objects in nsuserdefaults 6 answers

i tried several different method can save class in nsuserdefaults. don't know how save class override function. how can make it?

class countryentity: anyobject { private(set) var id: uint = 0 private(set) var name = ""  override func citydata(data: dictionary<string, anyobject>!) {     id = data.uint(key: "id")     name = data.string(key: "name") } 

}

i tried doesn't me

  private static var _selectedcountryentity: anyobject? = nsuserdefaults.standarduserdefaults().objectforkey(countrynamekey) {     didset {         let saveddata = nskeyedarchiver.archiveddatawithrootobject(selectedcountryentity as! nsdata)          nsuserdefaults.standarduserdefaults().setobject(saveddata, forkey: countrynamekey)         nsuserdefaults.standarduserdefaults().synchronize()     } }  static var selectedcountryentity: anyobject? {     {         return _selectedcountryentity     }         set { //            if newvalue != _selectedcountrytuple {                 _selectedcountryentity = newvalue //            }         }     } 

to store custom classes in nsuserdefaults, data type needs subclass of nsobject , should adhere nscoding protocol.

1) create custom class data

class customdata: nsobject, nscoding { let name : string let url : string let desc : string  init(tuple : (string,string,string)){     self.name = tuple.0     self.url = tuple.1     self.desc = tuple.2 } func getname() -> string {     return name } func geturl() -> string{     return url } func getdescription() -> string {     return desc } func gettuple() -> (string,string,string) {     return (self.name,self.url,self.desc) }  required init(coder adecoder: nscoder) {     self.name = adecoder.decodeobjectforkey("name") as! string     self.url = adecoder.decodeobjectforkey("url") as! string     self.desc = adecoder.decodeobjectforkey("desc") as! string }  func encodewithcoder(acoder: nscoder) {     acoder.encodeobject(self.name, forkey: "name")     acoder.encodeobject(self.url, forkey: "url")     acoder.encodeobject(self.desc, forkey: "desc") }  } 

2) save data use following function:

func savedata()     {         let data  = nskeyedarchiver.archiveddatawithrootobject(custom)         let defaults = nsuserdefaults.standarduserdefaults()         defaults.setobject(data, forkey:"customarray" )     } 

3) retrieve:

if let data = nsuserdefaults().dataforkey("customarray"), custom = nskeyedunarchiver.unarchiveobjectwithdata(data) as? [customdata] { // retrieved data     item in custom {     print(item)     } } 

note: here saving , retrieving array of trhe custom class objects.