方法将javascript代码和函数从openlay4.4更新到6。

Question

我使用openlays4.4创建了一个web映射接口。是否有一种特殊的方法来更新与版本6兼容的代码和函数？

Answer 1

如果您继续像在ol.js中一样使用https://openlayers.org/en/latest/doc/quickstart.html构建，那么许多映射将继续工作，或者只需要在升级说明中记录的小更改。最常见的问题可能是：

https://github.com/openlayers/openlayers/blob/main/changelog/upgrade-notes.md#new-internal-tile-coordinates

https://github.com/openlayers/openlayers/blob/main/changelog/upgrade-notes.md#new-prerender-and-postrender-layer-events-replace-old-precompose-render-and-postcompose-events

https://github.com/openlayers/openlayers/blob/main/changelog/upgrade-notes.md#layers-can-only-be-added-to-a-single-map (这通常会影响带有OverviewMap控件的映射)

https://github.com/openlayers/openlayers/blob/main/changelog/upgrade-notes.md#removal-of-olfeaturestylefunction

https://github.com/openlayers/openlayers/blob/main/changelog/upgrade-notes.md#replacement-of-olsphere-constructor-with-olsphere-functions

https://github.com/openlayers/openlayers/blob/main/changelog/upgrade-notes.md#changes-in-proj4-integration

https://github.com/openlayers/openlayers/blob/main/changelog/upgrade-notes.md#renaming-of-the-defaultdataprojection-in-the-options-and-property-of-the-olformatfeature-class-and-its-subclasses

此外，地图将不再以默认大小打开，因此需要使用css或以其他方式设置映射div的大小。