fatal error: use of unimplemented initializer 'init()' for class

iOS
1

I’m getting an exception when implementing nscoding and saving the object to backendless.

I can save / open the object locally and if i remove the nscoding i can save it to backendless.

Is there a way around this?

Thanks

2

Could you please attach the code which demonstrates what you’re doing?

Regards,
Mark

3

So the object does get saved to backendless before it throws an exception.

class testObject: NSObject, NSCoding { 
 
 var name : String 
 
 
 
 init(name: String=String()) { 
 
 self.name = name 
 
 } 
 
 
 
 required convenience init(coder decoder: NSCoder) { 
 
 self.init() 
 
 self.name = decoder.decodeObjectForKey("name") as! String 
 
 } 
 
 
 
 func encodeWithCoder(coder: NSCoder) { 
 
 coder.encodeObject(self.name, forKey: "name") 
 
 } 
 
} 
 




 var test = testObject() 
 
 test.name = "Jimmy" 
 
 var filePath = documentsDirectory().stringByAppendingPathComponent("fileName") 
 
 NSKeyedArchiver.archiveRootObject(test, toFile: filePath) 
 
 let names = NSKeyedUnarchiver.unarchiveObjectWithFile(filePath) as? testObject 
 
 print("%@",names?.name) 
 
 let dataStore = backendless.data.of(testObject.ofClass()) 
 
 
 
 
 // save object asynchronously 
 
 dataStore.save( 
 
 test, 
 
 response: { (result: AnyObject!) -> Void in 
 
 let obj = result as! testObject
 
 print("name has been saved: \(obj.objectId)") 
 
 }, 
 
 error: { (fault: Fault!) -> Void in 
 
 print("Server reported an error: \(fault)") 
 
 })
4

Thanks, Robert. I assigned it to a developer for investigation

5

Have they been able to duplicate it, work around, fix?

Thanks
Robert

6

Hi Robert,

I am going to investigate this issue tomorrow.

Regards,
Slava

7

Hi Robert,

I’ve made some fixes in your sample, and it works fine now:

class testObject: NSObject, NSCoding {
 
 var objectId : String?
 var name : String
 
 override init() {
 self.name = "?"
 }
 
 init(name: String) {
 self.name = name
 }
 
 required convenience init(coder decoder: NSCoder) {
 self.init()
 self.name = decoder.decodeObjectForKey("name") as! String
 }
 
 func encodeWithCoder(coder: NSCoder) {
 coder.encodeObject(self.name, forKey: "name")
 }
}

 func testObjectWithNSCoding() {
 
 let test = testObject(name: "Jimmy")
 let dataStore = backendless.data.of(testObject.ofClass())
 
 // save object asynchronously
 dataStore.save(
 test,
 response: { (result: AnyObject!) -> Void in
 let obj = result as! testObject
 print("name has been saved: \(obj.objectId)")
 },
 
 error: { (fault: Fault!) -> Void in
 print("Server reported an error: \(fault)")
 })
 }

Try this fixed code and let us know how it goes.

Regards,
Slava

8

Thank You!