setVisibleMapRectWithPaddingHandler method
- {@required BMFCoordinateBounds visibleMapBounds,
 - @required EdgeInsets insets,
 - @required bool animated}
 
设置显示在指定相对于MapView的padding中的地图地理范围
BMFCoordinateBoundsvisibleMapBounds 要设定的地图范围(东北,西南)角坐标
EdgeInsetsinsets 指定的四周边界大小
animated 是否采用动画效果(ios 独有)
bool 成功返回true 失败false
Implementation
Future<bool> setVisibleMapRectWithPaddingHandler(
    {@required BMFCoordinateBounds visibleMapBounds,
    @required EdgeInsets insets,
    @required bool animated}) async {
  return await BMFMapDispatcherFactory.instance
      .getMapStateDispatcher()
      .setVisibleMapRectWithPaddingDispatch(
          _mapChannel, visibleMapBounds, insets, animated);
}