VEMap:单独平移和缩放工作;在一起,缩放不再有效

时间:2010-09-24 07:42:58

标签: javascript iphone touch bing-maps virtual-earth

我试图让Bing Maps的VEMap与触控设备兼容,尤其是iphone / webkit手机。

在以下示例中,这有效:   - 用一根手指平移   - 使用捏(双指)放大/缩小

但是,如果我同时放置两个,则缩放不再起作用:您可以在控制台中看到VEMap.ZoomIn()或VEMap.ZoomOut()被调用,但没有任何反应(没有错误,异常或任何事情,它只是没有做任何事情。)

最有可能存在一个解决方案http://www.bing.com/maps处理触摸和手势都很好,但是代码被压缩了,所以到目前为止我很难过,所以任何想法都会有很大的帮助。

<!DOCTYPE html>
<html>
<head>
    <title>VEMap</title>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no;" />
    <meta name="apple-mobile-web-app-capable" content="yes" />
    <script type="text/javascript" src="http://ecn.dev.virtualearth.net/mapcontrol/mapcontrol.ashx?v=6.3&mkt=en-us"></script>
</head>
<body onload="init()">


<div id="mymap" style="position: relative; width: 256px; height: 256px;"></div>


<script type="text/javascript">
// Reference to the VEMap
var map = null;

// Whether a gesture is being performed currently or not.
var gesture = false;

// Translates touch event names into similar mouse event names
var touch2mouse = {"touchstart": "mousedown", "touchmove": "mousemove", "touchend": "mouseup"};


// Initializes the map and adds the touch/gesture listeners
function init(){
    map = new VEMap('mymap');
    map.HideDashboard();
    map.LoadMap(new VELatLong(51.64, -0.18), 9, VEMapStyle.Road);

    if (typeof Touch == "object"){
        // Zooms the map using touch-pinch
        document.addEventListener("gesturestart", ongesture, true);
        document.addEventListener("gesturechange", ongesture, true);
        document.addEventListener("gestureend", ongesture, true);

        // Pans the map using touch-drag
        // If you comment out these three lines, pinch-zoom works :(
        document.addEventListener("touchstart", ontouch, true);
        document.addEventListener("touchmove", ontouch, true);
        document.addEventListener("touchend", ontouch, true);
    }
}


// One finger interaction
function ontouch(e){
    var touches = e.changedTouches;
    if ((!gesture) && (touches.length == 1)){
        if (e.type == "touchmove") e.preventDefault();
        var obj = touches[0];
        var e2 = document.createEvent("MouseEvent");
        e2.initMouseEvent(touch2mouse[e.type], true, true, window, 1, obj.screenX, obj.screenY, obj.clientX, obj.clientY, false, false, false, false, 0, null);
        obj.target.dispatchEvent(e2);
    }
}

// Two fingers interaction
function ongesture(e){
    e.preventDefault();
    switch(e.type){
        case "gesturestart":
            gesture = true;
        break;
        case "gestureend":
            gesture = false;
            if (e.scale > 1.2){
                console.log('Attempting to zoom IN.');
                map.ZoomIn();
            } else if (e.scale < 0.8){
                map.ZoomOut();
                console.log('Attempting to zoom OUT.');
            }
        break;
    }
}
</script>



</body>
</html>

1 个答案:

答案 0 :(得分:1)

我遇到了完全相同的问题,而且似乎明显缺乏关于该特定点的文档!

我在msdn论坛的以下地址找到了一些关于视口的信息,但对我来说,即使删除视口元属性并修复地图容器的大小也没有给出任何积极的结果。

http://social.msdn.microsoft.com/Forums/en-US/vemapcontroldev/thread/342e5807-7bb5-4c54-94d4-095e800fb736

我希望我能尽快找到答案。