title: how to update core data entered values
body: <pre><code>[newVehicle setValue: _txtFieldVehicleNumber.text forKey:@"number"];
  
  [newVehicle setValue: lblFuelType.text forKey:@"fueltype"];
  
  [newVehicle setValue: lblFuelUnit.text forKey:@"fuelunit"];
  
  [newVehicle setValue: lblDistanceUnit.text forKey:@"distanceunit"];
  </code></pre>
  
  <p>I want to update my core data entity named "Vehicle", for that entity I have several attributes and I want to update some of them but not all when I select particular attribute from the entity. 
  So what should I do ??</p>