How to get iOS 8.3 emoji keyboard height?

问题

I can handle two events: when keyboard shows and when keyboard hides. Everything worked fine in iOS 8.2 and older.

But how to handle event when you change your keyboard language? When you change the english keyboard to the emoji keyboard, the height of emoji keyboard (in ios 8.3) is bigger and it hides the content.

Or maybe you have a solution how to control iOS 8.3 emoji keyboard height?

回答1:

OK. So looking at my old code, I remembered, I do not use 2 observers (UIKeyboardDidShowNotification/UIKeyboardDidHideNotification). I use a single observer (UIKeyboardWillChangeFrameNotification), that is fired of each event: Keyboard hiding, keyboard showing, keyboard changing frame.

In my case, the text box and send button are in nested in a UIView and this is view is added in the view of the UIViewController, above everything else.

I add the observer in viewDidAppear and remove the observer in viewWillDisappear.(to avoid any notification firing when view is not active).

The above information is not necessary for your case, just added it for information sake. Relevant code is as follows:

ADD OBSERVER:

- (void) viewDidAppear:(BOOL)animated {

    [super viewDidAppear:animated];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillChangeFrame:) name:UIKeyboardWillChangeFrameNotification object:nil];
}

HANDLE NOTIFICATION:

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

    NSDictionary* notificationInfo = [notification userInfo];

    CGRect keyboardFrame = [[notificationInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];

    [UIView animateWithDuration:[[notificationInfo valueForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue]
                          delay:0
                        options:[[notificationInfo valueForKey:UIKeyboardAnimationCurveUserInfoKey] integerValue]
                     animations:^{

                         CGRect frame = self.textViewContainer.frame;
                         frame.origin.y = keyboardFrame.origin.y - frame.size.height;
                         self.textViewContainer.frame = frame;

                     } completion:nil];
}

You might have to make a few adjustments to the frame.origin.y... line for correct calculations. I don't know whether you have a UITabBarController or any bars at the bottom. The safest bet here would be:

frame.origin.y = self.view.frame.size.height - keyboardFrame.size.height - X;

Where X is 0 if your VC covers the whole screen. If not, use the heights of any bottom bars.

回答2:

I had the same problem. Just replace UIKeyboardFrameBeginUserInfoKey with UIKeyboardFrameEndUserInfoKey . :-)

It worked for me.

回答3:

It's worth noting that the emoji keyboard is the same hight as the standard keyboard with suggested text enabled.

To properly determine keyboard height and adjust your view, add these observers:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidHide:) name:UIKeyboardDidHideNotification object:nil];

Then I use the following methods to animate the keyboard adjustment. Really all you need is the keyboardBounds object, but if you happen to be using AutoLayout, this is how you'd do it:

- (void)keyboardDidShow:(NSNotification *)notification
{
    [self scrollControlBarTo:notification up:YES];
}

-(void)keyboardDidHide:(NSNotification *)notification
{
    [self scrollControlBarTo:notification up:NO];
}

- (void)scrollControlBarTo:(NSNotification *)notification up:(BOOL)up
{
    [_keyboardControlsBar layoutIfNeeded];
    CGRect keyboardBounds;
    NSDictionary *info = [notification userInfo];
    NSNumber *number = [info objectForKey:UIKeyboardAnimationDurationUserInfoKey];
    double duration = [number doubleValue];
    [[info objectForKey:UIKeyboardFrameEndUserInfoKey] getValue:&keyboardBounds];
    UIViewAnimationCurve curve = [[info objectForKey:UIKeyboardAnimationCurveUserInfoKey] integerValue];

    [UIView animateWithDuration:duration
                          delay:0
                        options:UIViewAnimationOptionBeginFromCurrentState
                     animations:^{
                         [UIView setAnimationCurve:curve];
                         _keyboardControlsBarBottomConstraint.constant = (up) ? keyboardBounds.size.height : 0;
                         [self.view layoutIfNeeded];
                     } completion:nil];
}

回答4:

Code above but in swift:

func viewDidAppear(_ animated: Bool) {

    super.viewDidAppear(animated)

    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillChangeFrame(_:)), name: UIResponder.keyboardWillChangeFrameNotification, object: nil)
}

...

func keyboardWillChangeFrame(_ notification: Notification?) {

let notificationInfo = notification?.userInfo

let keyboardFrame = notificationInfo?[UIResponder.keyboardFrameEndUserInfoKey]?.cgRectValue

UIView.animate(withDuration: TimeInterval((notificationInfo?[UIResponder.keyboardAnimationDurationUserInfoKey] as? NSNumber)?.floatValue ?? 0.0), delay: 0, options: UIView.AnimationOptions(rawValue: (notificationInfo?[UIResponder.keyboardAnimationCurveUserInfoKey] as? NSNumber)?.intValue ?? 0), animations: {

    let frame = self.textViewContainer.frame


     frame.origin.y = (keyboardFrame?.origin.y ?? 0.0) - frame.size.height
        self.textViewContainer.frame = frame

    })
}

来源：https://stackoverflow.com/questions/29926144/how-to-get-ios-8-3-emoji-keyboard-height

标签

ios

objective-c

ios8.3