避免“抱歉，我们在这里没有图像"与谷歌地图 [英] Avoiding "Sorry, we have no imagery here" with Google Maps

问题描述

我正在编写Google Maps应用程序，在大多数情况下都可以正常工作.但是，如果我要求在彼此非常接近的2个点之间行走(例如2座彼此相邻的建筑物)，那么地图会放大得如此近，以至于混合图像变成显示为抱歉，我们没有图像的图块"在这里."

I'm writing a Google Maps application, for the most part it works fine. But if I request walking directions between 2 points that are very close to each other (like 2 buildings that are next door to 1 another), the map zooms in so close that the hybrid images turns to tiles reading "Sorry, we have no imagery here."

从我代码中的调试说明来看，似乎直到更新了DirectionsRenderer的函数运行后才设置地图的缩放级别(添加map.getZoom()调用向我显示了地图的zoom属性我要求的上一轮指示.

From debugging notes in my code, it appears that the zoom level of the map isn't being set until after the function that updates the DirectionsRenderer runs (adding a map.getZoom() call shows me the map's zoom property for the previous round of directions I requested.

因此，MazZoomService也不是对我有任何帮助.

Because of this, MazZoomService isn't really doing me much good either. Is there a way to detect what the zoom level of the map will be when processing directions so I can zoom the image back out to something that doesn't show an error message?

推荐答案

在地图的"zoom_changed"事件中使用MaxZoomService.如果当前缩放级别大于最大值，请map.setZoom(max).

Use the MaxZoomService inside of the map's "zoom_changed" event. If the current zoom level is greater than the max, map.setZoom(max).

如果您只想从DirectionsRenderer更新的结果中启用此行为，则需要设置一个标志并可能设置一个计时器(DirectionsRenderer并不总是更改地图缩放级别).

If you wish to only enable this behavior from the results of a DirectionsRenderer update, you'll need to set a flag and possibly a timer (DirectionsRenderer doesn't always change the map zoom level).

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