像 Swift 中的 Uber iOS 应用程序一样移动 Google 地图上的注释？

Question

我正在尝试开发一个基于 Uber 和 Ola 类似概念的应用程序。因此，为此我需要整合 Google 地图以获取和放下位置离子 iOS。所以请告诉我如何使用 Google 地图在 iOS 中实现移动注释（汽车）动画。

Answer 1

使用 Swift 3.1

        var oldCoodinate: CLLocationCoordinate2D? = CLLocationCoordinate2DMake(CDouble((data.value(forKey: "lat") as? CLLocationCoordinate2D)), CDouble((data.value(forKey: "lng") as? CLLocationCoordinate2D)))
        var newCoodinate: CLLocationCoordinate2D? = CLLocationCoordinate2DMake(CDouble((data.value(forKey: "lat") as? CLLocationCoordinate2D)), CDouble((data.value(forKey: "lng") as? CLLocationCoordinate2D)))
        driverMarker.groundAnchor = CGPoint(x: CGFloat(0.5), y: CGFloat(0.5))
        driverMarker.rotation = getHeadingForDirection(fromCoordinate: oldCoodinate, toCoordinate: newCoodinate)
        //found bearing value by calculation when marker add
        driverMarker.position = oldCoodinate
        //this can be old position to make car movement to new position
        driverMarker.map = mapView_
        //marker movement animation
        CATransaction.begin()
        CATransaction.setValue(Int(2.0), forKey: kCATransactionAnimationDuration)
        CATransaction.setCompletionBlock({() -> Void in
            driverMarker.groundAnchor = CGPoint(x: CGFloat(0.5), y: CGFloat(0.5))
            driverMarker.rotation = CDouble(data.value(forKey: "bearing"))
            //New bearing value from backend after car movement is done
        })
        driverMarker.position = newCoodinate
        //this can be new position after car moved from old position to new position with animation
        driverMarker.map = mapView_
        driverMarker.groundAnchor = CGPoint(x: CGFloat(0.5), y: CGFloat(0.5))
        driverMarker.rotation = getHeadingForDirection(fromCoordinate: oldCoodinate, toCoordinate: newCoodinate)
        //found bearing value by calculation
        CATransaction.commit()

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

新旧坐标获取方位值的方法

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

        let fLat: Float = Float((fromLoc.latitude).degreesToRadians)
        let fLng: Float = Float((fromLoc.longitude).degreesToRadians)
        let tLat: Float = Float((toLoc.latitude).degreesToRadians)
        let tLng: Float = Float((toLoc.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
        }
    }

对于 Objective C 代码：

github：ARCarMovement

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