Change height of inputAccessoryView issue

Question

When I change the height of inputAccessoryView in iOS 8, the inputAccessoryView not go to the right origin, but covers the keyboard.

Answer 1

After reading the answer above, which is a great find, I was concerned that relying on the constraint you need to change being [0] or firstObject is an implementation detail that's likely to change under us in the future.

After doing a bit of debugging, I found that the Apple-added constraints on the accessory input view seem to have a priority of 76. This is a crazy low value and not one of the listed enums in the documentation for priority.

Given this low priority value it seems like a cleaner solution to simply conditionally add/remove another constraint with a high priority level, say UILayoutPriorityDefaultHigh when you want to resize the view?