I have one NSTextView within NSBox. I want to draw focus ring aroung NSBox whenever NSTextView got focus a开发者_StackOverflownd remove focus ring as soon as NSTextView lost focus.
apple-pencil跟踪定位功能用法详解 Apple Pencil是不具有查找我的iPhone的功能，无法通过激活锁来定位查找。
加载中,请稍侯......