[英]OpenLayers click event on iPhone with PhoneGap
我在使用PhoneGap的iPhone 4上的OpenLayers地圖上遇到了點擊事件的問題。 似乎我的setMarker(evt)函數接收的Position取決於滾動位置。 在仔細研究了x和y的值后,我發現y甚至可以是負數。 相同的代碼在Android上運行,setMarker接收x和y的合理值。
以下是出現此問題的簡短示例:
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no;" />
<meta charset="utf-8">
<style>
html, body {
height:99%;
width:99%;
}
</style>
<script type="text/javascript" charset="utf-8" src="phonegap-1.4.1.js"></script>
<script type="text/javascript" charset="utf-8" src="OpenLayers.js"></script>
<script type="text/javascript">
var map, layer, markers;
function setMarker(e){
markers.clearMarkers();
var markerpos = map.getLonLatFromViewPortPx(e.xy);
var size = new window.OpenLayers.Size(21,25);
var offset = new window.OpenLayers.Pixel(-(size.w/2), -size.h);
var icon = new window.OpenLayers.Icon('http://www.openlayers.org/dev/img/marker.png',size,offset);
var marker = new window.OpenLayers.Marker(markerpos,icon);
markers.addMarker(marker);
}
function onDeviceReady()
{
map = new window.OpenLayers.Map("map", { controls: [new window.OpenLayers.Control.Navigation()]});
layer = new window.OpenLayers.Layer.OSM("Simple OSM Map");
map.addLayer(layer);
map.setCenter(
new window.OpenLayers.LonLat(10,50).transform(
new window.OpenLayers.Projection("EPSG:4326"), // From WGS 84
map.getProjectionObject() // to Spherical Mercator
),
18 //Zoom
);
var touchNav = new window.OpenLayers.Control.TouchNavigation({
defaultClickOptions:{
pixelTolerance: 10
}
});
// A click will set the marker:
window.OpenLayers.Util.extend(touchNav, {
defaultClick: function(evt) {
alert("you clicked " + evt.xy);
setMarker(evt);
}
});
map.addControl(touchNav);
touchNav.activate();
markers = new window.OpenLayers.Layer.Markers("Markers");
map.addLayer(markers);
console.log("map generated");
}
</script>
</head>
<body onload="document.addEventListener('deviceready', onDeviceReady, false);">
<br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/>
<div id="map" style="width:100%;height:100%"></div>
<br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/>
</body>
</html>
類似的問題在這里,但由於我已經在使用OpenLayers 2.11,他的解決方案對我沒有幫助: Openlayers中的縮放和鼠標事件問題
我終於通過使用event.lastTouches [0]獲取iPhone上的x / y坐標來使用此代碼:
var x = e.xy.x;
var y = e.xy.y;
if(window.device.platform === "iPhone"){
x = e.lastTouches[0].clientX;
y = e.lastTouches[0].clientY + window.pageYOffset;
x -= document.getElementById("map").offsetLeft;
y -= document.getElementById("map").offsetTop;
}
var markerpos = map.getLonLatFromViewPortPx(new window.OpenLayers.Pixel(x, y));
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.