I’ve stopped being surprised when I talk to iPhone and iPad owners and find out they don’t know that you can tap and hold most keys on the virtual keyboard to get additional related keys. For example, on almost any iOS keyboard, tap and hold the “A” key to selection of accented a’s.
In MATLAB Mobile 3.1 on both iPhone and iPad, we’ve incorporated this behavior for each of the symbol keys in our custom keyboard rows. We’ve grouped symbols together in a way we think are logical: brackets, quotes, punctuation, math operations, logical operations.
Here is a catalog for the iPhone:
The iPad has the same set of keys in addition to the digits 0-9. The digit keys do not have any extra keys behind the tap & hold.
Let us know what you’d like to see in the next iterations of the keyboard, in the comments below.
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BTW, the tap-n-hold feature is also available on droids…
Suggestion – add the shift variant to the digit keys (e.g., the key 2 will display 2 and @)
Nice touch to have added the extended keys to your custom ones. A while ago I submitted a wishful enhancement request to have a calculator mode keyboard that would let you operate on ans and pick from vars in the workspace. This way, you wouldn’t have to fiddle with function names and parens for simple things.
Another suggestion – to key people into what the long press does, you can put a small icon of one of the long press keys in the corner. My current keyboard does this, Thumb Keyboard for Android; https://lh3.ggpht.com/RGrLy47jJoaX3FS7T1MZPhzTYGeBdexH66wmEc6IODpAmTLs-bcwlzNYPfjcwh5cKv4