Mapbox标注层旋转复位地图缩放或移动 [英] Mapbox annotation layer rotation resets on map zoom or move

问题描述

我想定制我的mapbox注释的层的外观。
我想每一个旋转标注层。

I'm trying to customize the appearance of the layers of my annotations in mapbox. I want to rotate every annotation layer.

- (RMMapLayer *)mapView:(RMMapView *)mapView layerForAnnotation:(RMAnnotation *)annotation
{
    if (annotation.isUserLocationAnnotation)
        return nil;

    RMMarker *marker;
    CGPoint xy = CGPointFromString(annotation.userInfo);
    marker = [[RMMarker alloc] initWithUIImage:[UIImage imageNamed:@"arrow.png"]];
    marker.transform = CATransform3DMakeRotation(atan2f(xy.x, xy.y) * 180 / M_PI,0,0,1);

    marker.canShowCallout = YES;

return marker;
}

它的工作原理他们第一次在地图上加载。但是，当我移动或缩小它们重置回其初始地图变换矩阵。

It works the first time they load on the map. But when I move or zoom the map they reset back to their initial transform identity matrix.

任何想法我怎么能解决这个问题？抑或是mapbox的一个bug？

Any ideas how I could solve this ? Or is it a bug of mapbox ?

推荐答案

以在在 RMMapView.m 看看 annotationTransform 。这得到的东西像罗盘追踪模式在运动过程中纠正，所以你要修改的东西用自己的自定义转换（S），因为这不是这个SDK的公共API的一部分。

Take a look in RMMapView.m at the annotationTransform. This gets corrected during movements for things like compass tracking mode, so you'll want to modify things with your own custom transform(s) as this isn't a public API part of this SDK.

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