MinMaxZoomPreference constructor

const MinMaxZoomPreference(
  1. double minZoom,
  2. double maxZoom
)

为地图创建一个不可变的最大最小缩放范围 当 minZoom > maxZoom时,会触发断言

Implementation

const MinMaxZoomPreference(this.minZoom, this.maxZoom)
    : assert(minZoom == null || maxZoom == null || minZoom <= maxZoom);