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POIs this the right way to consume a webservice with AFNetworking
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  1. POIs this the right way to consume a webservice with AFNetworking
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    copied!<p>I am currently implementing the connection from the app to my webservice, at the moment I am trying to figure out what's the right way of doing this. I decided to use the AFNetworking library for the connection and handle the JSON output via AFNetworking too. I read here, that the best way to implement such an asynchronous is the usage of a callback delegate. Here are the links to my two classes. I would really enjoy some tipps and critic on my implementation and especially what to improve.</p> <p><a href="http://pastebin.com/AUfPhD58" rel="nofollow">ViewController</a></p> <p><a href="http://pastebin.com/FQtbNdG4" rel="nofollow">WebServiceClass</a></p> <p>Code:</p> <pre><code>#import "SLLoginViewController.h" @interface SLLoginViewController () @end @implementation SLLoginViewController - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { } return self; } - (void)viewDidLoad { [super viewDidLoad]; sharedWebService = [SLWebService sharedWebService]; [sharedWebService setDelegate:self]; [sharedWebService login:@"test@hotmail.de" withPassword:@"12345"]; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; } - (void)requestFinished:(NSString *)name withResult:(NSDictionary *)result andError:(NSError *)error { NSLog(@"%@", result); } @end </code></pre> <p>WebService</p> <pre><code>#import &lt;Foundation/Foundation.h&gt; #import "AFNetworking.h" @class SLWebService; @protocol SLWebServiceDelegate &lt;NSObject&gt; @required - (void)requestFinished:(NSString *)name withResult:(NSDictionary *)result andError:(NS Error *)error; @end @interface SLWebService : NSObject { NSURL *baseURL; AFHTTPClient *client; } @property id &lt;SLWebServiceDelegate&gt; delegate; + (id)sharedWebService; - (void)login:(NSString *)email withPassword:(NSString *)password; - (NSError *)generateError:(NSString *)description domain:(NSString *)domain; @end #import "SLWebService.h" @implementation SLWebService @synthesize delegate; + (id)sharedWebService { static SLWebService *sharedWebService = nil; static dispatch_once_t onceToken; dispatch_once(&amp;onceToken, ^{ sharedWebService = [[self alloc] init]; }); return sharedWebService; } -(id)init { self = [super init]; if(self) { baseURL = [[NSURL alloc] initWithString:@"http://www.domain.de/"]; client = [[AFHTTPClient alloc] initWithBaseURL:baseURL]; } return self; } -(void)login:(NSString *)email withPassword:(NSString *)password { NSDictionary *params = @{@"email":email, @"password":password}; NSMutableURLRequest *request = [client requestWithMethod:@"GET" path:@"login.php" parameters:params]; AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) { NSString *result = [JSON objectForKey:@"result"]; if ([result isEqualToString:@"fail"]) { [[self delegate] requestFinished:@"login" withResult:nil andError:[self generateError:[JSON objectForKey:@"reason"] domain:@"de.Searchlight.WebServiceError"]]; } else { NSDictionary *dic = @{@"firstname":[JSON objectForKey:@"firstname"], @"lastname":[JSON objectForKey:@"lastname"], @"gender":[JSON objectForKey:@"gender"]}; [[self delegate] requestFinished:@"login" withResult:dic andError:[self generateError:[JSON objectForKey:@"reason"] domain:@"de.Searchlight.WebServiceError"]]; } } failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *err, id JSON) { [[self delegate]requestFinished:@"login" withResult:nil andError:err]; }]; [operation start]; } -(NSError *)generateError:(NSString *)description domain:(NSString *)domain { NSError *error; NSDictionary *userInfo = @{NSLocalizedDescriptionKey : description}; error = [NSError errorWithDomain:domain code:200 userInfo:userInfo]; return error; } @end </code></pre>
 

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