Question

I have a iPad app, using XCode 4.5, Storyboards, iOS 6 and MagicalRecord. This code is causing the error, and I don’t see why. Both aApptStart and selectedStartDate are defined as DateTime. So, what is causing this?

Here is the offending code:

- (IBAction)saveAppointment:(UIButton *)sender {

    NSManagedObjectContext *localContext = [NSManagedObjectContext MR_contextForCurrentThread];
    AppointmentInfo *newAppointment = [AppointmentInfo createEntity];  //  create the entity

    NSLog(@"Selected start Date (save): %@", [self formatSelectedDate: selectedStartDate]); 

    newAppointment.aApptStart = selectedStartDate;  //  <------  causing the error
    newAppointment.aApptEnd= selectedEndDate;
    newAppointment.aTech = selectedTech;

    [localContext MR_saveNestedContexts];
}

Here is the error I’m getting:

Terminating app due to uncaught exception
‘NSInvalidArgumentException’, reason: ‘-[NSManagedObject
setAApptStart:]: unrecognized selector sent to instance 0xee85dd0’

Answer 1

So, what is causing this?

The error indicates that there is no property of that name in AppointmentInfo.

Well, does your NSManagedObject subclass (AppointmentInfo) declare the property aApptStart? Also, does a corresponding attribute for your entity exist (if the property is implemented @dynamically)?

I guess it would…. Maybe a typo?
Can you show interface and implementation of AppointmentInfo?