Move the cursor around paddling

iOS custom keyboard around the keyboard to move the cursor implement

Until we are,For example, third-party input method Sogou input method has a classic gesture - paddling around on the keyboard to move the cursor。And this feature I am also very common,So,I want to implement it yourself。

The first thing I think of is UISwipeGestureRecognizer ,However, with predictable results,Paddling can only move the cursor one space,This is not what I want[……]

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