MKUserLocation点的iOS 10标题箭头

问题描述

iOS 10中的地图应用现在包含 MKUserLocation MKAnnotationView 顶部的标题方向箭头。有什么办法可以在我自己的应用程序中将它添加到 MKMapView 吗？

The Maps app in iOS 10 now includes a heading direction arrow on top of the MKUserLocation MKAnnotationView. Is there some way I can add this to MKMapView in my own apps?

编辑：我很乐意手动执行此操作，但我不确定是否可能？我可以在地图中添加注释并让它跟随用户的位置，包括动画移动吗？

I'd be happy to do this manually, but I'm not sure if it's possible? Can I add an annotation to the map and have it follow the user's location, including animated moves?

推荐答案

我通过添加解决了这个问题 MKUserLocation annotationView的子视图，如此

I solved this by adding a subview to the MKUserLocation annotationView, like so

func mapView(mapView: MKMapView, didAddAnnotationViews views: [MKAnnotationView]) {
if annotationView.annotation is MKUserLocation {
    addHeadingViewToAnnotationView(annotationView)
    }
}

func addHeadingViewToAnnotationView(annotationView: MKAnnotationView) {
    if headingImageView == nil {
        if let image = UIImage(named: "icon-location-heading-arrow") {
            let headingImageView = UIImageView()
            headingImageView.image = image
            headingImageView.frame = CGRectMake((annotationView.frame.size.width - image.size.width)/2, (annotationView.frame.size.height - image.size.height)/2, image.size.width, image.size.height)
            self.headingImageView = headingImageView
        }
    }

    headingImageView?.removeFromSuperview()
    if let headingImageView = headingImageView {
        annotationView.insertSubview(headingImageView, atIndex: 0)
    }

    //use CoreLocation to monitor heading here, and rotate headingImageView as required
}

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