How to Use Cache Memory concept in objective-c

Question

// Web service request

        NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL: [NSURL URLWithString: urlLoc]];
        NSString *postLength = [NSString stringWithFormat:@"%d", [requestData length]];
        [request setHTTPMethod: @"POST"];
        [request setValue:postLength forHTTPHeaderField:@"Content-Length"];
        [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
        [request setHTTPBody: requestData];

        NSError *respError = nil;
        NSData *returnData = [NSURLConnection sendSynchronousRequest: request returningResponse: nil error: &respError ];

  //returndata is response of webservice
 NSString *responseString = [[NSString alloc] initWithData:returnData encoding: NSUTF8StringEncoding];


        NSDictionary *results = [responseString JSONValue] ;
        NSLog(@"chat data- %@",results);

        NSString *strResults = [results objectForKey:@"d"];
        NSLog(@"result string is-%@",strResults);

this is the code that I am using for my Data fetching from web service. But i have to do this every time when come to this page. Is that any method that can store my data in Cache memory so i need not to request every time.

I Am using

NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];

but i dont know how to use - (NSCachedURLResponse *) connection this method thanks...

Ex: [NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlString] cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData timeoutInterval:60]; — Kumar KL

Kumar KL Kumar KL · Accepted Answer · 2013-11-12T10:47:18

You need to use cache as of your needs according to this documentation: whenever you requesting a NSMutableURLRequest...

For Ex:

[NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlString] cachePolicy:NSURLRequestReloadRevalidatingCacheData timeoutInterval:60];

For More details Kindly look into the Documentation

How to Use Cache Memory concept in objective-c

1 Answers