Google maps 使用fromLatLngToPoint（）将V2转换为V3时，值不会出现

我正在将代码

V2

转换为

V3

，下面的代码是

googlemap

V2

code。在警报

sw.x

中出现了一些值

//Google map V2 code:
function flagIntersectingMarkers()  {
   var pad = this.borderPadding;
       var zoom = this.map.getZoom(); 
   var projection = this.map.getCurrentMapType().getProjection();
   var bounds = this.map.getBounds();
   var sw = bounds.getSouthWest();
   sw = projection.fromLatLngToPixel(sw, zoom);
   alert("sw"+sw.x); // In this alert some value is coming
   sw = new GPoint(sw.x-pad, sw.y+pad);
  sw = projection.fromPixelToLatLng(sw, zoom, true);
 }

//Google map V3 code:
function flagIntersectingMarkers()  {
   var pad = this.borderPadding;
       var zoom = this.map.getZoom();
   var projection = this.map.getProjection();
   var bounds   = this.map.getBounds();
   var sw = bounds.getSouthWest();
   sw = projection.fromLatLngToPoint(sw, zoom);
   alert("sw"+sw.x); // Undefined value is coming
   sw = new google.maps.Point(sw.x-pad, sw.y+pad);
   sw = projection.fromPointToLatLng(sw, zoom, true);
 }

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但是在上面的

V3

代码中，在即将到来的警报

sw.x

未定义值中，如何在

V3

中检索

sw.x

值您面临的问题是您没有将一些调用正确地从v2转换到V3，并且没有检查方法的参数列表。确保

---

您好，任何人都可以为V2到V3的迁移提供帮助。我正在提醒投影值，它显示为object。如何打印对象？请帮忙。！！！如果您在jsfiddle上发布了一个完整的v2代码工作示例，以及map，If将非常有用。

//Google map V3 code:
function flagIntersectingMarkers()  {
   var pad = this.borderPadding;
   var zoom = this.map.getZoom();              // Returns number
   var projection = this.map.getProjection();  // Returns Projection
   var bounds   = this.map.getBounds();        // Returns LatLngBounds
   var sw = bounds.getSouthWest();             // Returns LatLng
   var swpt = projection.fromLatLngToPoint(sw); // WRONG in original code 2nd argument is Point, and not needed, plus should not overwrite sw
   alert("swpt"+swpt.x); // Should be defined now
   swptnew = new google.maps.Point(swpt.x-pad, swpt.y+pad); // Build new Point with modded x and y
   swnew = projection.fromPointToLatLng(swptnew, true);  //Build new LatLng with new Point, no second argument, true for nowrap
}