更新核心数据对象swift 3

Question

我想在swift 3中更新核心数据对象。经过一些Google搜索后，我没有发现任何有关swift的问题3.因此，我的问题是：如何在swift中更新核心数据对象3？

Answer 1

试试这个

 let empId = "001" 
     let fetchRequest:NSFetchRequest<NSFetchRequestResult> = NSFetchRequest.init(entityName: "EmpDetails") 
     let predicate = NSPredicate(format: "empId = '\(empId)'") 
     fetchRequest.predicate = predicate 
     do 
     { 
      let test = try context?.fetch(fetchRequest) 
      if test?.count == 1 
         { 
          let objectUpdate = test![0] as! NSManagedObject 
          objectUpdate.setValue("newName", forKey: "name") 
          objectUpdate.setValue("newDepartment", forKey: "department") 
          objectUpdate.setValue("001", forKey: "empID") 
          do{ 
           try context?.save() 
          } 
          catch 
          { 
           print(error) 
          } 
         } 
     } 
     catch 
     { 
      print(error) 
     }