InputAccessoryView docked at bottom

Question

I\'m trying to achieve similar positioning behavior as the bottom text input bar in Apple\'s Messages app.

I have tried many approaches, searched high and low and th

Answer 1

So I know this is an old post and I am not sure if you resolved this or not, but I found a way to get this working. I believe there is a bug in the inputAccessoryView, but I created a hacky solution to behave the way the messages app does. I think I provided all the necessary code to implement the work around. I am going to try and get a more appropriate blog post created sometime in the near future, with a more in depth description with my findings. Any questions, let me know.

@property(nonatomic,assign)BOOL isFirstKeyboard; //workaround for keyboard bug

@property(nonatomic,assign)BOOL isViewAppear;

@property(nonatomic,strong)ChatBarView *chatView; //custom chat bar view

@property(nonatomic,strong)UIView *footerPadView; //just to add some nice padding
////////////////////////////////////////////////////////////////////////////////////////////////////
//in the view did load
- (void)viewDidLoad
{
    //more app specific code...
    self.tableView.keyboardDismissMode = UIScrollViewKeyboardDismissModeInteractive;
    self.chatView.textView.inputAccessoryView = self.chatView;
}

////////////////////////////////////////////////////////////////////////////////////////////////////
-(void)done
{
    self.isFirstKeyboard = YES;
    [self.chatView.textView becomeFirstResponder];
}
////////////////////////////////////////////////////////////////////////////////////////////////////
- (void) moveTextViewForKeyboard:(NSNotification*)aNotification up:(BOOL)up
{
    if(!self.isViewAppear)
        return;
    //NSLog(@"keyboard is: %@", up ? @"UP" : @"Down");
    if(!up && !self.isFirstKeyboard)
        [self performSelector:@selector(done) withObject:nil afterDelay:0.01];
    else if(!up & self.isFirstKeyboard)
    {
        self.isFirstKeyboard = NO;
        [self.view addSubview:self.chatView];
        CGRect frame = self.chatView.frame;
        frame.origin.y = self.view.frame.size.height - self.chatView.frame.size.height;
        self.chatView.frame = frame;
    }
    else
    {
        NSDictionary* userInfo = [aNotification userInfo];
        NSTimeInterval animationDuration;
        UIViewAnimationCurve animationCurve;
        CGRect keyboardEndFrame;

        [[userInfo objectForKey:UIKeyboardAnimationCurveUserInfoKey] getValue:&animationCurve];
        [[userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] getValue:&animationDuration];
        [[userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] getValue:&keyboardEndFrame];

        // Animate up or down
        [UIView beginAnimations:nil context:nil];
        if(up)
            [UIView setAnimationDuration:0.2];
        else
            [UIView setAnimationDuration:0.3];
        [UIView setAnimationCurve:animationCurve];

        CGRect frame = self.footerPadView.frame;
        CGRect keyboardFrame = [self.view convertRect:keyboardEndFrame toView:nil];
        if (up)
            frame.size.height = keyboardFrame.size.height - self.chatView.frame.size.height;
        else
            frame.size.height = 0;
        self.footerPadView.frame = frame;
        self.tableView.tableFooterView = self.footerPadView;
        [UIView commitAnimations];
    }
}
////////////////////////////////////////////////////////////////////////////////////////////////////
- (void)keyboardWillShow:(NSNotification *)aNotification {
    [self moveTextViewForKeyboard:aNotification up:YES];
}
////////////////////////////////////////////////////////////////////////////////////////////////////
- (void)keyboardWillHide:(NSNotification *)aNotification
{
    [self moveTextViewForKeyboard:aNotification up:NO];
}
////////////////////////////////////////////////////////////////////////////////////////////////////