中心的GMSMarker图标(iOS)

我刚刚从Apple Maps切换到Google Maps.我似乎找不到答案的问题是,如何使GMSMarker的图标从中心开始,而不是从图像的底部开始.

我的意思是,当前位置点图标以其要表达的坐标为中心开始.不过,GMSMarkers图标从图标的底部开始.

解决方法

您可以使用属性groundAnchor更改您的标记图标的开始位置.

Google Maps SDK for iOS文档：

The ground anchor specifies the point in the icon image that is
anchored to the marker’s position on the Earth’s surface. This point
is specified within the continuous space [0.0,1.0] x [0.0,1.0],
where (0,0) is the top-left corner of the image,and (1,1) is the
bottom-right corner.

例：

The below example rotates the marker 90°. Setting the groundAnchor
property to 0.5,0.5 causes the marker to be rotated around its center,
instead of its base.

CLLocationCoordinate2D position = CLLocationCoordinate2DMake(51.5,-0.127);
CLLocationDegrees degrees = 90;
GMSMarker *london = [GMSMarker markerWithPosition:position];
london.groundAnchor = CGPointMake(0.5,0.5);
london.rotation = degrees;
london.map = mapView_;