ios - Gmsmap 快速旋转 View

Question

在这张图片中GMSMapView有两个标记

1. Green marker is pickup location and
2. Red marker is drop location marker

我想根据拾取位置旋转ma​​pView，拾取位置希望从mapView的左侧开始，放置位置希望放置在mapView的右侧

旋转:GMSMapView 使用委托(delegate)方法或任何自定义方法

/image/Re5Mp.png

Answer 1

你可以这样尝试

extension FloatingPoint {
    var degreesToRadians: Self { return self * .pi / 180 }
    var radiansToDegrees: Self { return self * 180 / .pi }
}

在 View Controller 中

func getHeadingForDirection(fromCoordinate fromLoc: CLLocationCoordinate2D, toCoordinate toLoc: CLLocationCoordinate2D) -> Float {

let fLat: Float = Float((self.mapView.camera.target.latitude).degreesToRadians)
let fLng: Float = Float((self.mapView.camera.target.longitude).degreesToRadians)
let tLat: Float = Float((fromLoc.latitude).degreesToRadians)
let tLng: Float = Float((fromLoc.longitude).degreesToRadians)
let degree: Float = (atan2(sin(tLng - fLng) * cos(tLat), cos(fLat) * sin(tLat) - sin(fLat) * cos(tLat) * cos(tLng - fLng))).radiansToDegrees
if degree >= 0 {
     return degree
} else {
     return 360 + degree
 }
}

在mapView(_mapView:GMSMapView,idleAt位置:GMSCameraPosition)

self.mapView.animate(toBearing: CLLocationDirection((self.getHeadingForDirection(fromCoordinate: self.pickUpMarker.position, toCoordinate: self.dropOffMarker.position) + 100) ))