问题描述
我想在MapKit的mapView上方显示几个MKPolylines.问题是将地图类型设置为.satelliteFlyover时，我的折线会消失.如果我更改为仅使用.satellite，则它们是可见的.
I want to show a few MKPolylines on top of MapKit's mapView. The problem is when setting the map type to .satelliteFlyover my polylines will disappear. If I change to just using .satellite they're visible.
mapView.type = .satelliteFlyover
mapView.addOverlay(polyline)
推荐答案
遇到了类似的问题，我发现iOS 13中的MKMultiPolylineRenderer更好地用于处理跨接MapType上的折线.您需要准备数组中的所有折线，以便可以使用所有折线:
had a similar problem, and I found that the MKMultiPolylineRenderer in iOS 13 is much better for handling polylines on a flyover MapType. You need to do prepare all of your polylines in an array so you have ALL polylines available:
var multiArray = [MKPolyline]()
// CREATE ALL OF YOUR POLYLINES AND APPEND THEM TO multiArray
view.addOverlay(MKMultiPolyline(multiArray))
然后，您需要创建一段代码来处理func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer中的MKMultiPolylines.我从字面上复制了我的MKPolyline部分，只是将所有引用从MKPolyline更改为MKMultiPolyline.
Then you need to create a section of code to handle MKMultiPolylines in func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer. I literally copied my MKPolyline section and just changed any reference from MKPolyline to MKMultiPolyline.
如果您无法将目标更改为iOS 13，该怎么办?两种跨接地图类型在iOS 13之前都表现出类似的情况.我也是，我只是无法解决跨接图类型.
IDK what to do if you can't change your target to iOS 13. Both flyover map types exhibit a similar situation before iOS 13. I'm also having problems with MKCircle that I just can't fix on the flyover map types.
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