本文介绍了诺基亚的缩放更改事件此处地图的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我对如何使用诺基亚此处地图处理缩放事件感到困惑.通常以
I'm confused on how to handle zoom events with Nokia Here maps. Usually for example
map.addEventListener('dragend', function(){....})
为什么同一签名不能用于
why cant the same signature work for something like
map.addEventListener('zoomend', function(){....})
我知道有一个名为mapviewchangeend
的事件,但是我将如何使用它来知道这是一次缩放更改还是一次拖动
I know there is a event called mapviewchangeend
but how will I use that to know if it was a zoom change rather a drag
谢谢!
推荐答案
此处,我认为达到您要求的最简单方法是在mapviewchangeend侦听器中检查地图缩放级别.
The supported map events are documented here , i think simplest way to achieve your requirement would be to check the map zoom level in the mapviewchangeend listener.
var oldZoom=map.getZoom();
map.addEventListener('mapviewchangeend', function(){
var newZoom=map.getZoom();
if(newZoom > oldZoom){
// zoomed in
}else{
// zoomed out
}
oldZoom=newZoom;
})
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