Autolayout Constraint - Keyboard

Question

Im stuck trying to animate a table view smoothly which has an autolayout contraint. I have a reference to the constraint \"keyboardHeight\" in my .h and have linked this up

Answer 1

Try it this way:

self.keyboardHeight.constant = -height;
[self.view setNeedsUpdateConstraints];

[UIView animateWithDuration:animationDuration animations:^{
   [self.view layoutIfNeeded];
}];

Remember this pattern because this should be the correct way to update constraint-based layouts (according to WWDC). You can also add or remove NSLayoutConstraints as long as you call setNeedsUpdateConstraints after.