Question

I’m having a horrible time getting this thing to work at all. I’ve spent two days reading the documentation on Salesforce’s website, the example code in the distributed SDK and just generally beating my head against the wall.

The most frustrating part is that I think I’m just missing the login screen, but I can’t find anything that will tell me how to make one. From what I can tell, it’s just a UIWebView that points to the SF login page.

Here’s what I’ve been able to figure out so far:

1. Added the SDK to my project (SalesforceSDK, SalesforceOAuth, RestKit) and linked against all the libraries that are mentioned in the Git readme.
2. Included "SFRestAPI.h" in my server communications class I’m using to send and receive data from the server.

3. Called the SFRestRequest using the code from the XCode template that’s distributed with the SDK:

   SFRestRequest *request = [[SFRestAPI sharedInstance] requestForQuery:@"SELECT Name FROM User LIMIT 10"];
   [[SFRestAPI sharedInstance] send:request delegate:self];
   

4. Added the delegate methods:


#pragma mark - Salesforce REST API delegate methods

- (void)request:(SFRestRequest *)request didLoadResponse:(id)jsonResponse
{
    NSLog(@"%@", jsonResponse);
}

- (void)request:(SFRestRequest *)request didFailLoadWithError:(NSError*)error
{
    NSLog(@"%@", error);
}

- (void)requestDidCancelLoad:(SFRestRequest *)request
{
    NSLog(@"%@", request);
}

- (void)requestDidTimeout:(SFRestRequest *)request
{
    NSLog(@"%@", request);
}

5. Saw this in the console:

`2012-09-11 10:23:44.128 ClientApp[39697:c07] SFRestAPI::send: <SFRestRequest 0xd4a9cb0 
endpoint: /services/data 
method: GET 
path: /v23.0/query 
queryParams: {
  "q" : "SELECT Name FROM User LIMIT 10"
}`

None of the delegate methods for SFRestRequest were called.

Here’s what hasn’t worked:

Making my app delegate a subclass of SFNativeRestAppDelegate

This created about 12 duplicate symbol errors:

duplicate symbol _OBJC_CLASS_$_SFNativeRestAppDelegate in:
    /Volumes/Wallace/Users/gromitt/Library/Developer/Xcode/DerivedData/ClientApp-bpccblcllzkzvudxtwutuqliagld/Build/Intermediates/ClientApp.build/Debug-iphonesimulator/ClientApp.build/Objects-normal/i386/SFNativeRestAppDelegate.o
    /Volumes/Wallace/Users/gromitt/Documents/Out to Lunch/ iOS Apps/ClientApp/ClientApp/dependencies/SalesforceSDK/libSalesforceSDK.a(SFNativeRestAppDelegate.o)
duplicate symbol _OBJC_IVAR_$_SFNativeRestAppDelegate._authViewController in:
    /Volumes/Wallace/Users/gromitt/Library/Developer/Xcode/DerivedData/ClientApp-bpccblcllzkzvudxtwutuqliagld/Build/Intermediates/ClientApp.build/Debug-iphonesimulator/ClientApp.build/Objects-normal/i386/SFNativeRestAppDelegate.o
    /Volumes/Wallace/Users/gromitt/Documents/Out to Lunch/ iOS Apps/ClientApp/ClientApp/dependencies/SalesforceSDK/libSalesforceSDK.a(SFNativeRestAppDelegate.o)
duplicate symbol _OBJC_IVAR_$_SFNativeRestAppDelegate._viewController in:
    /Volumes/Wallace/Users/gromitt/Library/Developer/Xcode/DerivedData/ClientApp-bpccblcllzkzvudxtwutuqliagld/Build/Intermediates/ClientApp.build/Debug-iphonesimulator/ClientApp.build/Objects-normal/i386/SFNativeRestAppDelegate.o
    /Volumes/Wallace/Users/gromitt/Documents/Out to Lunch/ iOS Apps/ClientApp/ClientApp/dependencies/SalesforceSDK/libSalesforceSDK.a(SFNativeRestAppDelegate.o)
duplicate symbol _OBJC_IVAR_$_SFNativeRestAppDelegate._window in:
    /Volumes/Wallace/Users/gromitt/Library/Developer/Xcode/DerivedData/ClientApp-bpccblcllzkzvudxtwutuqliagld/Build/Intermediates/ClientApp.build/Debug-iphonesimulator/ClientApp.build/Objects-normal/i386/SFNativeRestAppDelegate.o
    /Volumes/Wallace/Users/gromitt/Documents/Out to Lunch/ iOS Apps/ClientApp/ClientApp/dependencies/SalesforceSDK/libSalesforceSDK.a(SFNativeRestAppDelegate.o)
duplicate symbol _OBJC_METACLASS_$_SFNativeRestAppDelegate in:
    /Volumes/Wallace/Users/gromitt/Library/Developer/Xcode/DerivedData/ClientApp-bpccblcllzkzvudxtwutuqliagld/Build/Intermediates/ClientApp.build/Debug-iphonesimulator/ClientApp.build/Objects-normal/i386/SFNativeRestAppDelegate.o
    /Volumes/Wallace/Users/gromitt/Documents/Out to Lunch/ iOS Apps/ClientApp/ClientApp/dependencies/SalesforceSDK/libSalesforceSDK.a(SFNativeRestAppDelegate.o)
duplicate symbol _kDefaultLoginHost in:
    /Volumes/Wallace/Users/gromitt/Library/Developer/Xcode/DerivedData/ClientApp-bpccblcllzkzvudxtwutuqliagld/Build/Intermediates/ClientApp.build/Debug-iphonesimulator/ClientApp.build/Objects-normal/i386/SFNativeRestAppDelegate.o
    /Volumes/Wallace/Users/gromitt/Documents/Out to Lunch/ iOS Apps/ClientApp/ClientApp/dependencies/SalesforceSDK/libSalesforceSDK.a(SFAccountManager.o)
ld: 6 duplicate symbols for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Any help is appreciated. Thanks in advance.

Answer 1

So this is more than a little embarrassing, but I don’t want people to keep trying to answer this problem so here goes:

I had two copies of SFNativeAppDelegate.h added to my app. I was looking through the files included in the SF Mobile SDK, and I must have skipped over it. So I added it a second time, and that’s when my problems started.

I have it working now. Here’s what I did:

1. Create a Native app using the SalesForce project template.
2. Go to your Native app’s directory in the Finder. Copy the dependencies directory into your existing project.
3. Open the Native project in XCode and copy over the Settings.bundle to your existing project. Grab the SFAuthorizingViewController.xib while you’re in there, too. Close the Native project. You don’t need it anymore.
4. Open your existing app’s plist file. Add a key named SFDCOAuthLoginHost, and set it to either test.salesforce.com or login.salesforce.com
5. In your existing app delegate, include SFNativeAppDelegate.h, SFOAuthCoordinator.h and
   SFOAuthCredentials.h

6. Change the interface declaration line from this:

   @interface YourAppDelegate : UIResponder <UIApplicationDelegate>
   

   …to this:

   @interface YourAppDelegate : SFNativeRestAppDelegate
   

7. Add two properties to YourAppDelegate:

   @property (nonatomic, readonly) SFOAuthCoordinator *coordinator;
   @property (nonatomic, retain) SFAuthorizingViewController *authViewController;
   

8. Go to YouAppDelegate.m. Add the following lines:

   // Fill these in when creating a new Remote Access client on Force.com
   static NSString *const RemoteAccessConsumerKey = @"...yourConsumerKeyGoesHere...";
   static NSString *const OAuthRedirectURI = @"https://test.salesforce.com/services/oauth2/success";
   

9. Add these methods as well (the Authorizing Coordinator was the secret sauce I was missing)

     #pragma mark - Salesforce.com login helpers
   
       - (NSString*)remoteAccessConsumerKey {
           return RemoteAccessConsumerKey;
       }
   
       - (NSString*)oauthRedirectURI {
           return OAuthRedirectURI;
       }
   
       -(NSString *)oauthLoginDomain {
           return @"test.salesforce.com";
       }
   
       -(void)login{
          [self.coordinator authenticate];
       }
   
       - (void)logout {
           [self.coordinator revokeAuthentication];
           [self.coordinator authenticate];
       }
   
       - (void)loggedIn {
           //provide the Rest API with a reference to the coordinator we used for login
           [[SFRestAPI sharedInstance] setCoordinator:self.coordinator];
           //[[SFRestAPI sharedInstance] setApiVersion:@"24.0"];
       }
   
       - (UIViewController*)newRootViewController {
           NSLog(@"You must override this method in your subclass");
           [self doesNotRecognizeSelector:@selector(newRootViewController)];
           return nil;
       }
   
       - (SFOAuthCoordinator*)coordinator {
           //create a new coordinator if we don't already have one
           if (nil == _coordinator) {
   
               NSString *appName = [[[NSBundle mainBundle] infoDictionary] objectForKey:(NSString*)kCFBundleNameKey];
               NSString *loginDomain = [self oauthLoginDomain];
               NSString *accountIdentifier = [self userAccountIdentifier];
               //here we use the login domain as part of the identifier
               //to distinguish between eg  sandbox and production credentials
               NSString *fullKeychainIdentifier = [NSString stringWithFormat:@"%@-%@-%@",appName,accountIdentifier,loginDomain];
   
   
               SFOAuthCredentials *creds = [[SFOAuthCredentials alloc]
                                            initWithIdentifier:fullKeychainIdentifier
                                            clientId: [self remoteAccessConsumerKey] encrypted:NO ];
   
   
               creds.domain = loginDomain;
               creds.redirectUri = [self oauthRedirectURI];
   
               SFOAuthCoordinator *coord = [[SFOAuthCoordinator alloc] initWithCredentials:creds];
               coord.scopes = [[self class] oauthScopes];
   
               coord.delegate = self;
               _coordinator = coord;
           }
   
           return _coordinator;
       }
   

Now you’re ready to make a call using the SFRestAPI. If the user hasn’t already logged in, the SalesForce authentication page will appear the first time you try to use it.

Thanks to everyone who tried to help. Again, super-embarrassed.