[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(_updateContent:)
name:FBSDKProfileDidChangeNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(_accessTokenChanged:)
name:FBSDKAccessTokenDidChangeNotification
object:nil];
- (void)_updateContent:(NSNotification *)notification {
NSInteger slot = 0; FBSDKProfile *profile = notification.userInfo[FBSDKProfileChangeNewKey];
if (profile) { SUCacheItem *cacheItem = [SUCache itemForSlot:slot];
cacheItem.profile = profile;
[SUCache saveItem:cacheItem slot:slot];
}}
// Observe a new token, so save it to our SUCache and update
- (void)_accessTokenChanged:(NSNotification *)notification{
FBSDKAccessToken *token = notification.userInfo[FBSDKAccessTokenChangeNewKey];
if (!token) { [FBSDKAccessToken setCurrentAccessToken:nil];
[FBSDKProfile setCurrentProfile:nil];
} else {
NSInteger slot = 0;
SUCacheItem *item = [SUCache itemForSlot:slot] ?: [[SUCacheItem alloc] init];
if (![item.token isEqualToAccessToken:token]) {
item.token = token; [SUCache saveItem:item slot:slot];
}
}
}
- (IBAction)facebookLoginBtnClick:(id)sender {
NSInteger slot = 0; FBSDKAccessToken *token = [SUCache itemForSlot:slot].token;
if (token) {
[self fbAutoLoginWithToken:token];
} else {
[self fbNewLogin];
}
}
- (void)fbAutoLoginWithToken:(FBSDKAccessToken *)token{
// We have a saved token, issue a request to make sure it's still valid.
[FBSDKAccessToken setCurrentAccessToken:token];
FBSDKGraphRequest *request = [[FBSDKGraphRequest alloc] initWithGraphPath:@"me" parameters:nil];
[request setGraphErrorRecoveryDisabled:YES];
[request startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error) {
// Since we're only requesting /me, we make a simplifying assumption that any error // means the token is bad.
if (error) {
[[[UIAlertView alloc] initWithTitle:nil message:@"The user token is no longer valid."
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil] show];
[SUCache deleteItemInSlot:0];;
}
}];
}
- (void)fbNewLogin{
FBSDKLoginManager *login = [[FBSDKLoginManager alloc] init];
[login logInWithReadPermissions: @[@"public_profile",@"email"]
fromViewController:self handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) {
if (error) { DLog(@"Process error");
} else if (result.isCancelled) {
DLog(@"Cancelled");
} else {
DLog(@"Logged in");
FBSDKGraphRequest *request = [[FBSDKGraphRequest alloc] initWithGraphPath:result.token.userID
parameters:@{@"fields": @"id,name,email"}
HTTPMethod:@"GET"];
[request startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result,NSError *error)
{ // Handle the result DLog(@"%@,%@,%@",result[@"id"],result[@"name"],result[@"email"]);
}];
}
}];
}
