Question

I want to use a protocol, how can we implement it in iPhone.

///In POCViewController.h

#import

@protocol BasicAPI
-(NSString*)hello;
@end
@interface HessianPOCViewController : UIViewController
{
idbasicAPI;

}

@end

///

// In POCViewController.m
// In Some method

NSURL* url = [NSURL
URLWithString@”http://www.caucho.com/hessian/test/basic“];

id proxy =
(id)[CWHessianConnection
proxyWithURL:url
protocol:@protocol(basicAPI)];

NSLog(@”hello: %@”, [proxy hello]);

////

Please help me how I can implement above code?

Answer 1

In the above code snippet – the @protocol block goes in your header file, underneath the @end declaration that’s already there. Common use case is something like:

@interface MyClass
// properties, method definitions, etc
@end

@protocol BasicAPI

-(NSString*)hello;

@end

Then in some method body in your implementation file, MyClass.m

-(void)myMethod { 
   NSURL* url = [NSURL URLWithString@"http://www.caucho.com/hessian/test/basic"];
   id proxy = (id)[CWHessianConnection proxyWithURL:url protocol:@protocol(basicAPI)];
   NSLog(@"hello: %@", [proxy hello]);
}