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POBreaking circular references while maintaining access to attributes (Objective-c)
 

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    <p>I have two classes (<code>Test1</code> and <code>Test2</code>) that each have a property (<code>test2</code> and <code>test1</code> respectively) pointing to an instance of the other class. This means that <code>Test1.m</code> must import <code>Test2.h</code> and <code>Test2.m</code> must import <code>Test1.h</code>. The .h files must also have a forward declaration. Unfortunately, this means that I cannot access the attributes of <code>test2</code> and <code>test1</code> with dot notation. I can access them with message passing, but I should be able to use either notation. How can I resolve this problem?</p> <p><strong>Related</strong></p> <ul> <li><a href="https://stackoverflow.com/questions/2175168/strange-behaviour-for-view-property-of-view-controller">Strange behavior for view property of view controller</a></li> </ul> <p><strong>Test1</strong></p> <pre><code>//Test1.h @class Test2; @interface Test1 : NSObject { Test2* test2; int a1; } @property (nonatomic, retain) Test2* test2; - (void)meth1; @end //Test1.m #import "Test1.h" #import "Test2.h" @implementation Test1 @synthesize test2; - (void)meth1{ test2.a2;//Request for member 'a2' in something not a structure or union } @end </code></pre> <p><strong>Test2</strong></p> <pre><code>//Test2.h #import &lt;Foundation/Foundation.h&gt; @class Test1; @interface Test2 : NSObject { Test1 *test1; int a2; } @property (nonatomic, assign) Test1* test1; - (void)meth2; @end //Test2.m #import "Test2.h" #import "Test1.h" @implementation Test2 @synthesize test1; - (void)meth2{ test1.a1;//Request for member 'a1' in something not a structure or union } @end </code></pre>
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