I am looking for a solution about running FB.login() at a native iOS 6 app with UIWebView. I already debugged a lot and did not found the solution yet.
The problem is: When a call fb.login, my app opens a new UIWebView to handle it (like safari opens a new tab). Facebook Login appears but when it logs, a blank page appears and nothing happens (neither in root UIWebView)... anyone knows the solution to complete fb.login js flow?
Thanks guys!
PS: Links that does not helps--
https://stackoverflow.com/questions/13387272/fb-login-issue-with-ios-6
Did it!
It kinda of a hack, but the js facebook sdk login on UiWebView at iOS 6 finally works.
How it could be done? It is a pure JS + Facebook JS SDK + UIWebView Delegate handling functions solution.
JS - First step)
a login button (to connect with facebook) calls this function example, that will trigger Face JS login/oauth dialogs:
function loginWithFacebookClick(){
FB.login(function(response){
//normal browsers callback
});
}
JS - Second step)
add a authResponseChange listener every time user loads the webpage ( after FB.init() ) to catch user's connected status:
FB.Event.subscribe('auth.authResponse.Change', function(response){
//UIWebView login 'callback' handler
var auth = response.authResponse;
if(auth.status == 'connected'){
//user is connected with facebook! just log him at your webapp
}
});
AND with app's UIWebView delegate functions you can handler facebook oauth responses
Objective C - Third step)
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
NSString *url = [[request URL] absoluteString];
//when user status == connected (has a access_token at facebook oauth response)
if([url hasPrefix:@"https://m.facebook.com/dialog/oauth"] && [url rangeOfString:@"access_token="].location != NSNotFound)
{
[self backToLastPage];
return NO;
}
return YES;
}
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
NSString *url = [[webView.request URL] absoluteString];
if([url hasPrefix:@"https://m.facebook.com/dialog/oauth"])
{
NSString *bodyHTML = [webView stringByEvaluatingJavaScriptFromString:@"document.body.innerHTML"];
//Facebook oauth response dead end: is a blank body and a head with a script that does
//nothing. But if you got back to your last page, the handler of authResponseChange
//will catch a connected status if user did his login and auth app
if([bodyHTML isEqualToString:@""])
{
[self backToLastPage];
}
}
}
So, when 'redirect' user to the last loaded page, the second step is going to handler user action at facebook login dialogs.
If I got too fast with this answer, please ask me! Hope it helps.
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