iOS Use of Undeclared Identifier in Class method for creating a new entity

Question

I am trying to implement a simple factory method for creating a new entity for my core data database. In Pet+Create.h :

+ (Pet *)petWithName:(NSString *)name
          weight:(NSNumber *)weight
    weightIsInKg:(BOOL)yesorno
inManagedObjectContext:(NSManagedObjectContext *)context

In Pet+Create.m :

+ (Pet *)petWithName:(NSString *)name
          weight:(NSNumber *)weight
    weightIsInKg:(BOOL)yesorno
inManagedObjectContext:(NSManagedObjectContext *)context
{
Pet *newPet = nil;

newPet = [NSEntityDescription insertNewObjectForEntityForName:@"Pet" inManagedObjectContext:context];
newPet.name = name;
newPet.idealWeight = weight;
newPet.weightIsInKg = [NSNumber numberWithBool:weightIsInKg];

return newPet;
}

And finally, in Pet.h : (which is a generated file by xcode, I have not touched it)

#import <Foundation/Foundation.h>
#import <CoreData/CoreData.h>


@interface Pet : NSManagedObject

@property (nonatomic, retain) NSNumber * idealWeight;
@property (nonatomic, retain) NSString * name;
@property (nonatomic, retain) NSNumber * weightIsInKg;

@end

My problem is, I am getting a Use of undeclared identifier: weightIsInKg error message on newPet.weightIsInKg = [NSNumber numberWithBool:weightIsInKg]; Why am I getting this error? I have obviously declared weightIsInKg because it is in the method name! Am I missing something simple?

Answer 1

The parameter with which petWithName is called is named yesorno

weightIsInKg:(BOOL)yesorno

then you refer to it as weightIsInKg

newPet.weightIsInKg = [NSNumber numberWithBool:weightIsInKg];

Use instead

newPet.weightIsInKg = [NSNumber numberWithBool:yesorno];

Answer 2

Your method argument is called yesorno , not weightIsInKg . Use yesorno or sanitize your variable names.