[英]Updating single object in array (Transformable) from core data Swift 4
我有一個名為“Contacts”的實體,其屬性名為“contactList”,類型為“Transformable”。 我試圖保存和刪除工作正常。 但更新特定記錄的值不起作用
這是我的代碼
func updateRecord(primaryKey:String, mobileNumber:String) {
if let appDelegate = UIApplication.shared.delegate as? AppDelegate{
let context = appDelegate.persistentContainer.viewContext
let fetchRequest:NSFetchRequest<NSFetchRequestResult> = NSFetchRequest(entityName: "Contacts")
do{
let objects = try context.fetch(fetchRequest)
if objects.count > 0{
for object in objects{
let match = object as! NSManagedObject
let list = match.value(forKey: "contactList") as? [String:Any]
if list != nil && !(list!.isEmpty) {
let key = list!["taskPrimaryKey"] as! String
if key == primaryKey{
match.setValue(mobileNumber, forKeyPath: "Mobile")
do {
try context.save() // <- remember to put this :)
} catch {
// Do something... fatalerror
print("fatalerror : \(error.localizedDescription)")
}
break
}
}
}
}
} catch {
print("could not retrive error : \(error.localizedDescription)")
}
}
}
我假設mobileNumber
是一個number
??
match.setValue(NSNumber(mobileNumber), forKeyPath: "Mobile")
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