ios - 如何为Apple Mapkit天桥设置动画？

我在Apple上观看了WWDC会议
https://developer.apple.com/videos/play/wwdc2015/206/
我想制作一个31:33的天桥动画。从上到下改变相机角度并旋转。但是我写了一些代码，它崩溃了。请帮帮我，告诉我我的代码有什么问题，谢谢！

import UIKit
import CoreLocation
import MapKit

class Flyover: UIViewController, MKMapViewDelegate {
    var coordinate = CLLocationCoordinate2D(latitude: 40.7484405, longitude: -73.9856644)
    let distance : CLLocationDistance = 700
    let pitch : CGFloat = 65
    let heading = 90.0
    var camera: MKMapCamera?




    @IBOutlet var mapView: MKMapView!



    override func viewDidLoad() {
        super.viewDidLoad()
        mapView.mapType = .SatelliteFlyover
        let camera = MKMapCamera(lookingAtCenterCoordinate: coordinate,fromDistance: distance,pitch: pitch,heading: heading)
        mapView.camera = camera

        //I want the animation to play automatically as soon as the user is in the view.
        UIView.animateWithDuration(10.0, animations: {
            self.camera!.heading += 180
            self.camera!.pitch = 25
            self.mapView.camera = self.camera!
             })



    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }



    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        // Get the new view controller using segue.destinationViewController.
        // Pass the selected object to the new view controller.
    }
    */

}

最佳答案

你就快到了。试着做一个像这样的新相机。

mapView.camera = MKMapCamera(lookingAtCenter: pinLocation, fromDistance: 2000, pitch: 0, heading: 0)

let pinLocation = CLLocationCoordinate2D(latitude: latitude, longitude: longitude)

let rotationCamera = MKMapCamera(lookingAtCenter: pinLocation, fromDistance: 2000, pitch: 75, heading: 180)

UIView.animate(withDuration: 10, delay: 0, options: .curveEaseInOut, animations: {
            self.mapView.camera = rotationCamera
        }, completion: nil)

关于ios - 如何为Apple Mapkit天桥设置动画？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/37937397/