Obj-c - Delayed animation when returning to original state?

Question

I'm using the below code to shift a view and my tableview up when my keyboard is activated. When the keyboard is closed however, it takes the upView a solid 2 seconds after the keyboard closes to return to where it was (the tableView on the other hand, is instant). Why is this happening?

      - (void)viewDidLoad {
            [super viewDidLoad];

           [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillChange:) name:UIKeyboardWillShowNotification object:nil];


        }

        - (void)keyboardWillChange:(NSNotification *)notification {


            NSDictionary* keyboardInfo = [notification userInfo];

            NSValue* keyboardFrameBegin = [keyboardInfo valueForKey:UIKeyboardFrameEndUserInfoKey];

            CGRect keyboardFrameBeginRect = [keyboardFrameBegin CGRectValue];

            UITabBarController *tabBarController = [UITabBarController new];
            CGFloat tabBarHeight = tabBarController.tabBar.frame.size.height;


            self.keyboardHeight = keyboardFrameBeginRect.size.height - tabBarHeight;

        }


        - (void) animateTextView:(BOOL) up
         {

                const int movementDistance = self.keyboardHeight;

                const float movementDuration = 0.2f;
                int movement= movement = (up ? -movementDistance : movementDistance);


                [UIView beginAnimations: @"anim" context: nil];
                [UIView setAnimationBeginsFromCurrentState: YES];
                [UIView setAnimationDuration: movementDuration];

                self.upView.frame = CGRectOffset(self.upView.frame, 0, movement);
                [UIView setAnimationDidStopSelector:@selector(afterAnimationStops)];
                [UIView commitAnimations];

                self.tableView.frame = CGRectOffset(self.tableView.frame, 0, movement);
                [UIView setAnimationDidStopSelector:@selector(afterAnimationStops)];
                [UIView commitAnimations];

        }

    - (void)textViewDidBeginEditing:(UITextView *)textView
    {

     [self animateTextView:YES];

    }

- (void)textViewDidEndEditing:(UITextView *)textView
{
    [self animateTextView:NO];
}

UPDATED CODE

.m

- (void)handleKeyboard:(NSNotification*)aNotification{
    NSDictionary* info = [aNotification userInfo];
    NSValue* value = [info objectForKey:UIKeyboardAnimationDurationUserInfoKey];
    NSTimeInterval duration = 3;
    [value getValue:&duration];
    if (aNotification.name == UIKeyboardWillHideNotification) {
        /** KEYBOARD HIDE **/

       [UIView animateWithDuration:0 animations:^{ self.upView.frame = CGRectOffset(self.upView.frame, 0, self.keyboardHeight); self.tableView.frame = CGRectOffset(self.tableView.frame, 0, self.keyboardHeight); } completion:^(BOOL finished) {}];


        [self moveCustomView:NO duration:duration];
        NSLog(@"CLOSED!");
    }

    if (aNotification.name == UIKeyboardWillShowNotification) {
        /** KEYBOARD SHOW **/

 [UIView animateWithDuration:0 animations:^{ self.upView.frame = CGRectOffset(self.upView.frame, 0, -self.keyboardHeight); self.tableView.frame = CGRectOffset(self.tableView.frame, 0, -self.keyboardHeight); } completion:^(BOOL finished) {}];


        [self moveCustomView:YES duration:duration];
    }
}

- (void)moveCustomView:(BOOL)move duration:(NSTimeInterval)time{

}

Answer 1

This issue might be with the animation duration, so you can get the keyboard showing and hiding animation duration from the -(void)handleKeyboard:(NSNotification *)notification {}

and also handle the showing and hiding your custom view inside the same function. Add the following code to your viewDidLoad function

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleKeyboard:) name:UIKeyboardWillHideNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleKeyboard:) name:UIKeyboardWillShowNotification object:nil];

Handle keyboard actions and UI changes

- (void)handleKeyboard:(NSNotification*)aNotification{
    NSDictionary* info = [aNotification userInfo];
    NSValue* value = [info objectForKey:UIKeyboardAnimationDurationUserInfoKey];
    NSTimeInterval duration = 0;
    [value getValue:&duration];
    if (aNotification.name == UIKeyboardWillHideNotification) {
        /** KEYBOARD HIDE **/

        //calculate your view frames and handle UI changes
        /*
         .
         .
         .
         .
         .
         */
        [self moveCustomView:NO duration:duration];
    }

    if (aNotification.name == UIKeyboardWillShowNotification) {
        /** KEYBOARD SHOW **/

        //calculate your view frames and handle UI changes
        /*
         .
         .
         .
         .
         .
         */
        [self moveCustomView:YES duration:duration];
    }
}

- (void)moveCustomView:(BOOL)move duration:(NSTimeInterval)time{

}

Answer 2

I think you need to use thread to call animation immediately...

- (void)textViewDidBeginEditing:(UITextView *)textView {

    dispatch_async(dispatch_get_main_queue(), ^{
        [self animateTextView:YES];
    });
}

- (void)textViewDidEndEditing:(UITextView *)textView {
    dispatch_async(dispatch_get_main_queue(), ^{
        [self animateTextView:NO];
    });
}

I'm not much aware of your problem, but try this because if we got this type of problems dispatch_async() will solve.