swift 实现应用外导航（swift3.1）

简单介绍下如何使用 swift 实现跳转到高德地图、百度地图、或系统自带地图导航，有了这个，妈妈再也不用担心app里需要实现导航功能啦😆😆😆 总结一下，高德地图跳转完直接开始导航，个人认为体验最好。百度地图需要用户手动确认一下，也还不错。自带地图加载略慢，😳😳

//swift3.1
let alertController = UIAlertController(title: "选择导航地图", message: nil, preferredStyle: .actionSheet)
let cancelAction = UIAlertAction.init(title: "取消", style: .cancel) { (action) in
    
}
//系统自带地图，内核高德地图，无需判断是否安装
let appleAction = UIAlertAction(title: "自带地图", style: .default){ (action) in
    let currentLocation = MKMapItem.forCurrentLocation()
    let toLocation = MKMapItem.init(placemark: MKPlacemark.init(coordinate: view.annotation.coordinate, addressDictionary: nil))
    MKMapItem.openMaps(with: [currentLocation, toLocation],
                       launchOptions: [MKLaunchOptionsDirectionsModeKey:MKLaunchOptionsDirectionsModeDriving,
                                       MKLaunchOptionsShowsTrafficKey:true])
}
//百度地图
if UIApplication.shared.canOpenURL(URL.init(string: "baidumap://")!) {//判断是否安装了地图
    let baiduAction = UIAlertAction(title: "百度地图", style: .default){ (action) in
        //注意：origin={{我的位置}}不要变；目的地随便写
        let urlString = "baidumap://map/direction?origin={{我的位置}}&destination=latlng:\(view.annotation.coordinate.latitude),\(view.annotation.coordinate.longitude)|name=目的地&mode=driving&coord_type=gcj02"
        let escapedString = urlString.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)
        UIApplication.shared.openURL(URL.init(string: escapedString!)!)
    }
    alertController.addAction(baiduAction)
}
//高德地图
if UIApplication.shared.canOpenURL(URL.init(string: "iosamap://")!) {
    let gaodeAction = UIAlertAction(title: "高德地图", style: .default){ (action) in
        let urlString = "iosamap://navi?sourceApplication=随便写&backScheme=随便写&lat=\(view.annotation.coordinate.latitude)&lon=\(view.annotation.coordinate.longitude)&dev=0&style=2"
        let escapedString = urlString.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)
        UIApplication.shared.openURL(URL.init(string: escapedString!)!)
    }
    alertController.addAction(gaodeAction)
}

alertController.addAction(cancelAction)
alertController.addAction(appleAction)

present(alertController, animated: true, completion: nil)

info.plist中需要添加高德地图、百度地图为白名单：
在key:LSApplicationQueriesSchemes的array中增加下面两项：

白名单配置