ios game controller

hi guys need help
 i want make gamepad worls ios dont know how it.
i have seen can make using bluefruit ez key cant it.
im thinking make using arduino.
i have used arduino year have alot of thing.
so can please mean alot me tq

what part not understand?

you need have sensors?
which sensors?
read them arduino?
how frequent?
how send ios?
do have protocol descriptions talk ios?
...
many open questions

what did sofar, except asking question?
do have code , or schematics share can enhance?

you need tell lot more details. more tell better answers can expect.

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