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2012-06-05T13:44:37.103
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I just happened to see this post while researching. Here is a sample code: ClassA.h file: <pre><code>#import <Foundation/Foundation.h> #import "ClassB.h" @interface ClassA : NSObject <ClassBDelegate> @end </code></pre> ClassA.m file: <pre><code>#import "ClassA.h" @implementation ClassA -(void)createAnInstanceOfClassB { ClassB *myClassB = [[ClassB alloc]init]; //create an instance of ClassB myClassB.delegate = self; //set self as the delegate // [myClassB optionalClassBMethod]; //this is optional to your question. If you also want ClassA to call method from ClassB } -(void)calculate { NSLog(@"Do calculate thing!"); // calculate can be called from ClassB or ClassA } @end </code></pre> ClassB.h file: <pre><code>#import <Foundation/Foundation.h> @protocol ClassBDelegate <NSObject> -(void)calculate; //method from ClassA @end @interface ClassB : NSObject @property (assign) id <ClassBDelegate> delegate; //-(void)optionalClassBMethod; //this is optional to your question. If you also want ClassA to call method from ClassB @end </code></pre> ClassB.m file: <pre><code>#import "ClassB.h" @implementation ClassB @synthesize delegate; -(void)whateverMethod { [self.delegate calculate]; // calling method "calculate" on ClassA } //-(void)optionalClassBMethod //this is optional to your question. If you also want ClassA to call method from ClassB //{ // NSLog(@"optionalClassBMethod"); // [self whateverMethod]; //} @end </code></pre>
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1. POCalling a method from another class in Objective C
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