didChangeMetrics method

void didChangeMetrics()

当键盘高度变化时执行

Implementation

void didChangeMetrics(){
    WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
      final height =  MediaQuery.of(context).viewInsets.bottom;
      ref.read(myKeyBoardHeight.notifier).state = height;
      if(height == 0.0){
        onClose();
      }else{
        onShow(height);
      }
    });
}