iOS Retrieving valueForKey? - ios

Question

I'm new to iOS and working on a basic app, it's currently working with SSKeychain and AFNetworking to interact with an API. When you log in with the app I retrieve and set the auth_token in my CredentialStore class, I need to send the auth token to the API as a http header to get access. How can I retrieve the token that I'm storing in the CredentialStore class in my HomeViewController.
Here is my CredentialStore:
#import "GFCredentialStore.h"
#import "SSKeychain.h"
#define SERVICE_NAME #"Groupify"
#define AUTH_TOKEN_KEY #"auth_token"
#implementation GFCredentialStore : NSObject
- (BOOL)isLoggedIn {
return [self authToken] != nil;
}
- (void)clearSavedCredentials {
[self setAuthToken:nil];
}
- (NSString *)authToken {
return [self secureValueForKey:AUTH_TOKEN_KEY];
}
- (void)setAuthToken:(NSString *)authToken {
[self setSecureValue:authToken forKey:AUTH_TOKEN_KEY];
[[NSNotificationCenter defaultCenter] postNotificationName:#"token-changed" object:self];
}
- (void)setSecureValue:(NSString *)value forKey:(NSString *)key {
if (value) {
[SSKeychain setPassword:value
forService:SERVICE_NAME
account:key];
} else {
[SSKeychain deletePasswordForService:SERVICE_NAME account:key];
}
}
- (NSString *)secureValueForKey:(NSString *)key {
return [SSKeychain passwordForService:SERVICE_NAME account:key];
}
#end
Here I am trying to retrieve the authToken value and set it to a string so that I can send it as a http header:
#import "GFHomeViewController.h"
#import <AFNetworking.h>
#import "GFCredentialStore.h"
#define kBaseURL "http://localhost:3000/"
#define kHomeURL "newsfeed.json"
#interface GFHomeViewController ()
#end
#implementation GFHomeViewController
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
__weak typeof(self)weakSelf = self;
NSString *urlString = [NSString stringWithFormat:#"%s%s", kBaseURL, kHomeURL];
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.responseSerializer = [AFJSONResponseSerializer serializer];
manager.requestSerializer = [AFJSONRequestSerializer serializer];
[manager.requestSerializer setValue: forHTTPHeaderField:#"auth_token"];
[manager GET:urlString parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"JSON: %#", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Error: %#", error);
}];
}

Answer 1

Assuming SSKeychain is saving and returning values to/from the keychain, I'd think you would simply be able to do something like this
GFCredentialStore *credentialStore = [[CGCredentialStore alloc] init];
if ([credentialStore isLoggedIn]) {
NSString *authToken = [credentialStore authToken];
[manager.requestSerializer setValue:authToken forHTTPHeaderField:#"auth_token"];
} else {
// prompt/display controller for login
}
If I'm missing something in your problem/issue you're having, please clarify your question, and I'll have another go at it.