Question

我是iOS用户并使用基本应用程序时，它目前正与SSKeychain和AFNetworking合作，以便与API进行交互。当您使用我检索的应用程序登录并在我的CredentialStore类中设置auth_token时，我需要将身份验证令牌作为http标头发送到API以获取访问权限。如何检索我在HomeViewController中的CredentialStore类中存储的令牌。

这是我的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

这里我试图检索authToken值并将其设置为字符串，以便我可以将其作为http标头发送：

#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

假设SSKeychain正在保存并从钥匙串返回值，我认为你只能做这样的事情

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
}

如果我在您遇到的问题/问题中遗漏了某些内容，请澄清您的问题，我还会再次提出问题。

iOS正在检索valueForKey？

1 个答案: