ios - 中心的 GMSMarker 图标 (iOS)

Question

我刚刚从 Apple Maps 切换到 Google Maps。我似乎找不到答案的一个问题是如何使 GMSMarker 的图标从中心开始而不是从图像底部开始。

我的意思的一个例子是当前位置点图标以它要表达的坐标为中心开始。然而 GMSMarkers 图标从图标的底部开始。

Answer 1

您可以使用属性 groundAnchor 更改标记图标的起始位置。

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.

示例:

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_;