缩放视野展示所有经纬度后获取当前地图的缩放级别有错误 - WXOPEN Club

预期表现

初始设置地图的默认缩放级别，scale="{{scale}}"，scale:13
点击一个POI类型，在地图上显示先关的经纬度坐标点，然后调用MapContext.includePoints(Object object)聚合所有坐标点在地图视野范围内
在MapContext.includePoints(Object object)调用成功后回调MapContext.getScale(Object object)，获取聚合后的地图缩放级别
虽然坐标点聚合完成后地图缩放级别产生明显变化，但是MapContext.getScale(Object object)返回的缩放级别仍旧是初始值
所以导致在点击地图上加号和减号的时候，地图缩放未能显示预期效果

提供一个最简复现 Demo

<map id='map' scale="{{scale}}" show-location bindmarkertap="bindmarkertap" markers="{{markers}}" bindcontroltap="bindcontroltap" longitude="{{longitude}}" latitude="{{latitude}}">

<cover-view bindtap='bindcontroltap' class='map-pos-box'>

<cover-image src='../../images/map-pos.png' mode="widthFix" class="map-pos"></cover-image>

</cover-view>

<cover-view class='scalePuls' bindtap='scalePuls'>+</cover-view>

<cover-view class='scaleMinus' bindtap='scaleMinus'>-</cover-view>

</map>

Page({

data: {

scale: 13

},

....

})

//初始化地图控件

this.mapCtx = wx.createMapContext('map');

//聚合坐标点

this.mapCtx.includePoints({

padding: [35, 35, 35, 35],

points: markers,

complete: function () {

//获取聚合坐标点之后获取地图缩放级别

that.mapCtx.getScale({

success: function (res) {

//返回仍旧是初始化的scale:13

console.log(res.scale)

that.setData({

scale: res.scale

})

}

})

}

})