A custom keyboard on iOS looks like a small UIKit app. It is not. It is a UIInputViewController...
A custom keyboard on iOS looks like a small UIKit app. It is not. It is a
UIInputViewController living inside an extension process with rules that no
normal app has to obey, and the three that actually shape the code are:
a memory ceiling in the tens of megabytes, enforced by silent termination;
a sandbox that is off by default (Allow Full Access), which removes
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For as capable as smartphone hardware is, the software running on them can be especially restrictive and cumbersome. Unlike a…
