Refactor to init session delegate in Facebook.m constructor

Summary: The change basically just sets the session delegate in the constructor so
it's available when handleOpenUrl is called.

Test Plan: Ran the DemoApp and ensured SSO still works.

Reviewed By: toddkrabach

Reviewers: seshadri, leon, atishm, toddkrabach, lshepard, caabernathy

Differential Revision: 297414
Task ID: 653835

sample/DemoApp/Classes/DemoAppViewController.m

@@ -21,7 +21,7 @@
 // Your Facebook APP Id must be set before running this example
 // See http://www.facebook.com/developers/createapp.php
 // Also, your application must bind to the fb[app_id]:// URL
-// scheme (substitue [app_id] for your real Facebook app id).
+// scheme (substitute [app_id] for your real Facebook app id).
 static NSString* kAppId = nil;
 
 @implementation DemoAppViewController
@@ -45,6 +45,8 @@ - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
   if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {
     _permissions =  [[NSArray arrayWithObjects:
                       @"read_stream", @"publish_stream", @"offline_access",nil] retain];
+    _facebook = [[Facebook alloc] initWithAppId:kAppId
+                                    andDelegate:self];
   }
 
   return self;
@@ -54,7 +56,6 @@ - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
  * Set initial view
  */
 - (void)viewDidLoad {
-  _facebook = [[Facebook alloc] initWithAppId:kAppId];
   [self.label setText:@"Please log in"];
   _getUserInfoButton.hidden = YES;
   _getPublicInfoButton.hidden = YES;
@@ -86,7 +87,7 @@ - (void)dealloc {
  * Show the authorization dialog.
  */
 - (void)login {
-  [_facebook authorize:_permissions delegate:self];
+  [_facebook authorize:_permissions];
 }
 
 /**

src/Facebook.h

@@ -42,13 +42,12 @@
 @property(nonatomic, assign) id<FBSessionDelegate> sessionDelegate;
 @property(nonatomic, copy) NSString* localAppId;
 
-- (id)initWithAppId:(NSString *)app_id;
+- (id)initWithAppId:(NSString *)appId
+        andDelegate:(id<FBSessionDelegate>)delegate;
 
-- (void)authorize:(NSArray *)permissions
-         delegate:(id<FBSessionDelegate>)delegate;
+- (void)authorize:(NSArray *)permissions;
 
 - (void)authorize:(NSArray *)permissions
-         delegate:(id<FBSessionDelegate>)delegate
        localAppId:(NSString *)localAppId;
 
 - (BOOL)handleOpenURL:(NSURL *)url;

src/Facebook.m

@@ -57,11 +57,13 @@ @implementation Facebook
 /**
  * Initialize the Facebook object with application ID.
  */
-- (id)initWithAppId:(NSString *)app_id {
+- (id)initWithAppId:(NSString *)appId
+           andDelegate:(id<FBSessionDelegate>)delegate {
   self = [super init];
   if (self) {
     [_appId release];
-    _appId = [app_id copy];
+    _appId = [appId copy];
+    self.sessionDelegate = delegate;
   }
   return self;
 }
@@ -209,10 +211,8 @@ - (NSDictionary*)parseURLParams:(NSString *)query {
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 //public
 
-- (void)authorize:(NSArray *)permissions
-         delegate:(id<FBSessionDelegate>)delegate {
+- (void)authorize:(NSArray *)permissions {
   [self authorize:permissions
-         delegate:delegate
        localAppId:nil];
 }
 
@@ -265,13 +265,10 @@ - (void)authorize:(NSArray *)permissions
  *            and redirect the user to Safari.
  */
 - (void)authorize:(NSArray *)permissions
-         delegate:(id<FBSessionDelegate>)delegate
        localAppId:(NSString *)localAppId {
   self.localAppId = localAppId;
   self.permissions = permissions;
 
-  _sessionDelegate = delegate;
-
   [self authorizeWithFBAppAuth:YES safariAuth:YES];
 }
 
@@ -370,7 +367,7 @@ - (BOOL)handleOpenURL:(NSURL *)url {
  */
 - (void)logout:(id<FBSessionDelegate>)delegate {
 
-  _sessionDelegate = delegate;
+  self.sessionDelegate = delegate;
 
   NSMutableDictionary * params = [[NSMutableDictionary alloc] init];
   [self requestWithMethodName:@"auth.expireSession"