That’s certainly a possibility, and it’s something I’d considered during my testing. The behaviour you describe is the standard UIButton control behaviour on iOS, and it may be that the on-screen keyboard is made up of a set of UIButtons. However, this button-like behaviour – sliding off a key to negate a keypress – wouldn’t be appropriate for fast typing, which is much more about the initial impact on a key, rather than the subsequent movement.
If this *is* the cause of the missed keypresses, then it’s a mistake to use this kind of touch handling approach on a keyboard. Unlike a considered button press, typing is all about moving speedily around the keyboard. To put it anther way: if every keypress registered on the keyboard in my video *had* been used, my document would have had fewer mistakes.
Unfortunately, without a high-framerate video camera, it’s very hard for me to find out if this is the likely cause. Personally I’m not convinced – my typing style is very pecky – but it’s certainly worth considering.
Biting the hand that feeds IT
