Question

Hi all
I have an app where I allow the user to post something on their pinwall of facebook. I used the DemoApp directly from Facebook to set it up.

I have implemented a shake detection that does something when the user shakes the device. However, since those two functions are in the same viewcontroller, both of them dont work anymore.

• When Facebook pops the login window, the keyboard doesn’t appear anymore.
• Shakes are not detected anymore.

I suppose it has something to do with the first responders. I have tried a lot of things but I was not able to solve it. Here is the neccessary part of my code.

Post something on facebook pinwall:

- (IBAction)publishStream{

    FactsAppDelegate *appDelegate = (FactsAppDelegate *)[[UIApplication sharedApplication] delegate];
    NSMutableDictionary *dictionary = [[[NSMutableDictionary alloc] init]autorelease];
    [dictionary setObject:@"Du postest diesen Fact:" forKey:@"user_message_prompt"];
    [dictionary setObject:[[appDelegate.facts objectAtIndex:currentFactId] fact] forKey:@"message"];
    [_facebook dialog:@"feed" andParams:dictionary andDelegate:self];
}

Shake detection:

#pragma mark Motion catching
// shake motion began
- (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event {
    if (motion != UIEventSubtypeMotionShake) return;

    // load next fact
    [self next];

    // vibrate
    [self vibrate];
}

Method needed for shake detection:

#pragma mark Shake events are only detectable by the first responder
- (BOOL)canBecomeFirstResponder {
    return YES;
}

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    [self becomeFirstResponder];
}

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    [self resignFirstResponder];
}

Can anyone tell me what I have to change to get both (facebook, shake) working?
Thanks a lot,
doonot

Answer 1

Thanks to XJones I was finally able to fix my problem.

@XJones, I was reducing my app to the default functions and found out why I was not able to catch motions and why I had problems with the facebook keyboard.

My MainWindow.xib file was totally wrong and delegate was not set either. I deleted the xib file, mapped delegate and window and that’s it, I can now catch motions and even facebook posting works like a charm 🙂

Thanks a lot for taking care and offering your help!!