I have two custom NSObjects which reference each other, as below:
.h file class 1
#import <Foundation/Foundation.h>
#import "MyChildClass.h"
@interface MyParentClass : NSObject
@property (nonatomic, strong) NSString *Name;
@property (nonatomic) MyChildClass *myChild;
@end
.m file class 1:
#import "MyParentClass.h"
@implementation MyParentClass
@end
and...
.h file class 2:
#import <Foundation/Foundation.h>
#import "MyParentClass.h"
@interface MyChildClass : NSObject
@property (nonatomic) MyParentClass *myParent;
@end
.m file class 2:
#import "MyChildClass.h"
@implementation MyChildClass
@end
When I try and implement those as below, the project will not build, with the error "Arc Restrictions: Implicit conversion of an Objective-C pointer to 'int *' is disallowed with ARC"
View Controller implementation code:
MyParentClass *newParent = [[MyParentClass alloc] init];
MyChildClass *newChild = [[MyChildClass alloc] init];
newParent.Name = @"Johnny";
newParent.myChild = newChild;
newChild.myParent = newParent;
However, when I nest a second example into single .h/.m files, the project will build:
Nested .h file:
#import <Foundation/Foundation.h>
@class MyNestedClass;
@interface MyChildNestedClass : NSObject
@property (nonatomic, strong) MyNestedClass *myNested;
@property (nonatomic, strong) NSString *ChildName;
@end
@interface MyNestedClass : NSObject
@property (nonatomic, strong) MyChildNestedClass *myChild;
@property (nonatomic, strong) NSString *ParentName;
@end
Nested .m file:
#import "MyNestedClass.h"
@implementation MyChildNestedClass
@end
@implementation MyNestedClass
@end
I guess that by nesting the objects into a single file, I am somehow tricking ARC and that really I shouldn't be creating these circular references.
Could anyone suggest the correct way of nesting types like this?
What I am trying to achieve, is the following pseudo-scenario: Parent has a property of Child. Child has a property of the parent it is the child of.
Am I finding this difficult because I'm not supposed to do it (circular referencing), or am I missing something glaringly obvious?
Many thanks!
