All to known，Input method does not need to get off the grid. "Full access”，So according to Apple's rights，Naturally, you can not play the key tone。
but，Recent pocketed updated input method added this feature - you can even join in later versionsKey shockThe。However, I stillNo needGet "full access"。
Then，How I do it?
iOS in the sound and vibration
In fact, the same thing[……]