swift - 使用系统app导航

 

 

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import UIKit   //1.导入框架 import MapKit   class ViewController: UIViewController {     lazy var geoCoder : CLGeocoder = {         return CLGeocoder()     }()       override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {           geoCoder.geocodeAddressString("广州") { (pls, err) in             //广州坐标             guard let gzPL = pls?.first else{                 return             }                           self.geoCoder.geocodeAddressString("上海", completionHandler: { (pls, err) in                 //上海坐标                 if let shPL = pls?.first{                     self.beginNav(startPLCL: gzPL, endPLCL: shPL)                 }             })         }     } }   // MARK: - 导航起点和终点 extension ViewController{     func beginNav(startPLCL: CLPlacemark, endPLCL: CLPlacemark) {                   // 起点         let plMK: MKPlacemark = MKPlacemark(placemark: startPLCL)         let startItem: MKMapItem = MKMapItem(placemark: plMK)                   // 终点         let endplMK: MKPlacemark = MKPlacemark(placemark: endPLCL)         let endItem: MKMapItem = MKMapItem(placemark: endplMK)                   // 起点和终点         let mapItems: [MKMapItem] = [startItem, endItem]                   // 导航设置字典         let dic: [String : Any] = [             // 导航模式             MKLaunchOptionsDirectionsModeKey: MKLaunchOptionsDirectionsModeDriving,             // 地图样式             MKLaunchOptionsMapTypeKey: MKMapType.standard.rawValue,             // 显示交通             MKLaunchOptionsShowsTrafficKey: true         ]         MKMapItem.openMaps(with: mapItems, launchOptions: dic)     } }