Iphone6s Plus and above version Keyup/input event does not respond to Chinese input

Problem Description:
Bind the Keyup/input event on <input>, monitor input changes and execute business code.

The test found that:
Several Android and iphone6s are OK, but in the iphone6s Plus (iOS version does not look) on the Chinese input can not be real-time response, you need to enter a space or press the "completion" button.

There is a similar design before, looked at, is because I used the absolute positioning of <input>, do not use absolute positioning is good.

Plus is the plus one, and I smile.

On the Apple or try not to use absolute/fixed positioning bar, all kinds of problems.

Welcome to the question.