NSURLConnection using NSObject

ServiceConnector.h

#import <Foundation/Foundation.h>

@protocol ServiceConnectorDelegate <NSObject>

-(void)requestReturnedData:(NSMutableData*)data;

-(void)requestReturnedError:(NSString*)error;

@end

@interface ServiceConnector : NSObject <NSURLConnectionDelegate,NSURLConnectionDataDelegate>

@property (strong,nonatomic) id <ServiceConnectorDelegate> delegate;

- (void)sendRequest:(NSString*)urlStr postValue:(NSString*)postStr;

@end

ServiceConnector.m

#import "ServiceConnector.h"

@implementation ServiceConnector{

    NSMutableData *receivedData;

}

- (void)sendRequest:(NSString*)urlStr postValue:(NSString*)postStr

{

    NSMutableString *post = [NSMutableString stringWithFormat:@"%@",postStr];

    

    NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];

    NSString *postLength = [NSString stringWithFormat:@"%lu", (unsigned long)[postData length]];

    NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"%@/%@",kBaseURL,urlStr]];

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url

                                                           cachePolicy:NSURLRequestReloadIgnoringLocalCacheData

                                                       timeoutInterval:10.0];

    [request setHTTPMethod:@"POST"];

    [request setValue:postLength forHTTPHeaderField:@"Content-Length"];

    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];

    [request setHTTPBody:postData];

    

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

    

    if (connection) {

        receivedData = nil;

    }

}

#pragma mark - Data connection delegate -

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response

{

    receivedData = [[NSMutableData alloc]init];

    

}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data

{

    [receivedData appendData:data];

    

}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error

{

    [self.delegate requestReturnedError:@"noInternet"];

}

-(void)connectionDidFinishLoading:(NSURLConnection *)connection{

    

    [self.delegate requestReturnedData:receivedData];//send the data to the delegate

}

@end

example:

#import "ServiceConnector.h"

@interface HomeViewController : UIViewController<ServiceConnectorDelegate>

- (void)viewDidLoad

{

    [super viewDidLoad];

ServiceConnector *serviceConnector = [[ServiceConnector alloc] init];

        serviceConnector.delegate = self;

        NSString *postValue = [NSString stringWithFormat:@"sUser_id=%@&simage_id=%@",[self.sUser_id description],deleteId];

        [serviceConnector sendRequest:@"url.php" postValue:postValue];
}

-(void)requestReturnedError:(NSString *)error{

      NSLog(@"No internet connection");

}

-(void)requestReturnedData:(NSMutableData *)data{ 
//activated when data is returned    

    id jsonObjects = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];

}