That code is written for getting tokens from the Sync SDK, but you're using the Core SDK, so the values would be a little different.
I put this together for you as a basic concept of how this would work for going from the Core SDK to the API v2 Objective-C SDK:
- (NSArray * )getTokensFromCoreSDK
{
NSString *keychainPrefix = [[NSBundle mainBundle] bundleIdentifier];
NSString *keychainId = [NSString stringWithFormat:@"%@.dropbox.auth", keychainPrefix];
NSDictionary *keychainDict = @{(__bridge id)kSecClass: (__bridge id)kSecClassGenericPassword,
(__bridge id)kSecAttrService: keychainId,
(__bridge id)kSecMatchLimit: (__bridge id)kSecMatchLimitOne,
(__bridge id)kSecReturnAttributes: (__bridge id)kCFBooleanTrue,
(__bridge id)kSecReturnData: (__bridge id)kCFBooleanTrue};
CFDictionaryRef result = NULL;
OSStatus status = SecItemCopyMatching((__bridge CFDictionaryRef)keychainDict,
(CFTypeRef * )&result);
NSDictionary *attrDict = (__bridge_transfer NSDictionary * )result;
NSData *foundValue = [attrDict objectForKey:(__bridge id)kSecValueData];
NSMutableArray *credentials = [[NSMutableArray alloc] init];
if (status == noErr && foundValue) {
NSDictionary *savedCreds = [NSKeyedUnarchiver unarchiveObjectWithData:foundValue];
NSArray *credsForApp = [savedCreds objectForKey:@"kDBDropboxUserCredentials"];
for (NSDictionary *credsForUser in credsForApp) {
NSDictionary *token = @{
@"userId": [credsForUser objectForKey:@"kDBDropboxUserId"],
@"token": [credsForUser objectForKey:@"kMPOAuthCredentialAccessToken"],
@"tokenSecret": [credsForUser objectForKey:@"kMPOAuthCredentialAccessTokenSecret"]
};
[credentials addObject:token];
}
}
return credentials;
}
- (void)getAndSaveOAuth2TokensFromRetrievedOAuth1Tokens:(NSArray * )oauth1Tokens
{
DBTransportClient *transportClient = [[DBTransportClient alloc] initWithAccessToken:nil selectUser:nil userAgent:nil delegateQueue:nil forceForegroundSession:nil appKey:APP_KEY appSecret:APP_SECRET];
DropboxClient *client = [[DropboxClient alloc] initWithTransportClient:transportClient];
for (NSDictionary *oauth1Token in oauth1Tokens) {
[[client.authRoutes tokenFromOauth1:[oauth1Token objectForKey:@"token"] oauth1TokenSecret:[oauth1Token objectForKey:@"tokenSecret"]] response:^(DBAUTHTokenFromOAuth1Result *result, DBAUTHTokenFromOAuth1Error *routeError, DBRequestError *error) {
if (result) {
NSLog(@"OAuth 2 access token: %@\n", result.oauth2Token);
DBAccessToken *accessToken = [[DBAccessToken alloc] initWithAccessToken:result.oauth2Token uid:[oauth1Token objectForKey:@"userId"]];
[[DBOAuthManager sharedOAuthManager] storeAccessToken:accessToken];
} else {
NSLog(@"%@\n%@\n", routeError, error);
}
}];
}
}
...
NSArray *oauth1Tokens = [self getTokensFromCoreSDK];
[self getAndSaveOAuth2TokensFromRetrievedOAuth1Tokens: oauth1Tokens];
I haven't tested that extensively, so be sure to test it well in your app. I hope it helps though!
