Opening Facebook App from within my app glitch

esoteric · 02-08-2012, 04:00 AM

I have my Facebook fanpage setup and a button in my app 'Like us on Facebook'.

The code I have to do this is

Code:

-(IBAction)facebookButtonClicked
{       
    NSURL *pageURL = [NSURL URLWithString:@"fb://profile/myappid"];
    
    if (![[UIApplication sharedApplication] openURL: pageURL]) 
    {
        //if user doesn't have Facebook app installed open in Safari
        NSURL *webURL = [NSURL URLWithString:@"http://www.facebook.com/myapp"];
        [[UIApplication sharedApplication] openURL: webURL];
    }
}

If I have previously opened Facebook and have it running as a background process and click the button in my app, it works correctly and goes to the page.

The problem is if Facebook isn't running already and I click the button...it seems as though it's working, it starts to open the Facebook app...it stays on the Facebook splash screen for 5-10 secs than it just crashes.

In the Facebook app Crash Logs for when this happens I get this

Code:

Exception Type:  00000020
Exception Codes: 0x8badf00d
Highlighted Thread:  0

Application Specific Information:
com.facebook.Facebook failed to launch in time

Is this a known bug? Or am I doing something wrong?

Thanks!

JamesCahall · 02-10-2012, 12:09 AM

Quote:

Originally Posted by rrlemoine

I have my Facebook fanpage setup and a button in my app 'Like us on Facebook'.

The code I have to do this is

Code:

-(IBAction)facebookButtonClicked
{       
    NSURL *pageURL = [NSURL URLWithString:@"fb://profile/myappid"];
    
    if (![[UIApplication sharedApplication] openURL: pageURL]) 
    {
        //if user doesn't have Facebook app installed open in Safari
        NSURL *webURL = [NSURL URLWithString:@"http://www.facebook.com/myapp"];
        [[UIApplication sharedApplication] openURL: webURL];
    }
}

If I have previously opened Facebook and have it running as a background process and click the button in my app, it works correctly and goes to the page.

The problem is if Facebook isn't running already and I click the button...it seems as though it's working, it starts to open the Facebook app...it stays on the Facebook splash screen for 5-10 secs than it just crashes.

In the Facebook app Crash Logs for when this happens I get this

Code:

Exception Type:  00000020
Exception Codes: 0x8badf00d
Highlighted Thread:  0

Application Specific Information:
com.facebook.Facebook failed to launch in time

Is this a known bug? Or am I doing something wrong?

Thanks!

The Facebook app has gone through many changes of its url scheme and what points to what. It could be the case that Facebook apps needs you to point to:

fb://pages/APPID instead of fb://profiles/APPID

See the full list of url schemes here (maybe not up to date):
IPhone URL Schemes - akosma wiki

esoteric · 02-10-2012, 12:28 AM

Quote:

Originally Posted by JamesCahall

The Facebook app has gone through many changes of its url scheme and what points to what. It could be the case that Facebook apps needs you to point to:

fb://pages/APPID instead of fb://profiles/APPID

See the full list of url schemes here (maybe not up to date):
IPhone URL Schemes - akosma wiki

Before trying the fp://pages i thought i'd give what i had a shot one more time and now it works correctly, with Facebook app being closed before clicking on my button.

So i guess there is no problem with fb://profile/APPID , perhaps my phone just needed to be rebooted(which i had done this morning) or something?

I also tried the fb://pages/APPID just for fun and it would open the Facebook app but not load any page.

Thanks for the reply!