我试图创建一个具有两种用户类型的应用程序...一个发送一个位置，另一个用户类型（在另一个设备上）搜索一个区域并找到最近的用户。
＆＃xA;＆＃ xA;我一直在解析网站和堆栈溢出......他们似乎都从中间开始。我希望有人解释第一步
＆＃xA;＆＃xA;继承我的代码
＆＃xA;＆＃xA; 导入UIKit＆＃xA ;导入MapKit＆＃xA;导入CoreLocation＆＃xA;导入Parse＆＃xA;＆＃xA;类ViewController：UIViewController，MKMapViewDelegate，＆＃xA; CLLocationManagerDelegate，UISearchBarDelegate，＆＃xA; UIGestureRecognizerDelegate＆＃xA; {＆＃xA;＆＃ xA; @IBOutlet weak var photographer1：UIButton！＆＃xA; @IBOutlet weak var buyer1：UIButton！＆＃xA;＆＃xA; @IBOutlet weak var mapView：MKMapView！＆＃xA; @IBOutlet weak var searchBar：UISearchBar！ ＆＃xA;＆＃xA;让locationManager = CLLocationManager（）＆＃xA;＆＃xA; var searchController：UISearchController！＆＃xA; var annotation：MKAnnotation！＆＃xA; var localSearchRequest：MKLocalSearchRequest！＆＃xA; var localSearch：MKLocalSearch！＆＃xA; var localSearchResponse：MKLocalSearchResponse！＆＃xA; var error：NSError！＆＃xA; var pointAnnotation：MKPointAnnotation！＆＃xA; var pinAnnotationView：MKPinAnnotationView！＆＃xA;＆＃xA; override func viewDidLoad中（）＆＃XA; {＆＃XA; super.viewDidLoad（）＆＃XA;＆＃XA; self.locationManager.delegate = self＆＃xA; self.mapView.delegate = self＆＃xA; self.locationManager.desiredAccuracy = kCLLocationAccuracyBest＆＃xA; self.locationManager.requestWhenInUseAuthorization（）＆＃XA; self.locationManager.startUpdatingLocation（）＆＃XA; self.mapView.showsUserLocation = true＆＃xA;＆＃xA;}＆＃xA; //运行动画这段代码检查区域是否已更改＆＃xA;＆＃xA;＆＃xA; var mapChangedFromUserInteraction = false＆＃xA;＆＃xA; func mapViewRegionDidChangeFromUserInteraction（） - ＆gt; Bool {＆＃xA;让view = self.mapView.subviews [0]＆＃xA; //查看手势识别器以确定此区域更改是否来自用户交互＆＃xA;如果让gestureRecognizers = view.gestureRecognizers {＆＃xA; for gestureRecognizers中的识别器{＆＃xA; if（recognizer.state == UIGestureRecognizerState.Began || Recognizer.state == UIGestureRecognizerState.Ended）{＆＃xA;返回true＆＃xA; }＆＃XA; }＆＃XA; }＆＃XA; return false＆＃xA;}＆＃xA;＆＃xA; func mapView（mapView：MKMapView，regionWillChangeAnimated animated：Bool）{＆＃xA; mapChangedFromUserInteraction = mapViewRegionDidChangeFromUserInteraction（）＆＃xA; if（mapChangedFromUserInteraction）{＆＃xA; //用户更改了地图区域＆＃xA; }＆＃xA;}＆＃xA;＆＃xA; func mapView（mapView：MKMapView，regionDidChangeAnimated animated：Bool）{＆＃xA; if（mapChangedFromUserInteraction）{＆＃xA; hobo（）＆＃xA;＆＃xA; //＆＃xA; buyer1.center = CGPointMake（188.0,513.0）＆＃xA;＆＃xA; photographer1.center = CGPointMake（188.0,581.0）＆＃xA;＆＃xA; }＆＃xA;}＆＃xA;＆＃xA; //你的男孩＆＃xA;＆＃xA; // MARK： - 位置代理方法＆＃xA;＆＃xA; func locationManager（经理：CLLocationManager，didUpdateLocations位置： [CLLocation]）＆＃XA; {＆＃XA; let location = locations.last＆＃xA;＆＃xA; let center = CLLocationCoordinate2D（纬度：location！.coordinate.latitude，经度：location！.coordinate.longitude）＆＃xA; let region = MKCoordinateRegion（center：center，span：MKCoordinateSpan（latitudeDelta：0.01，longitudeDelta：0.01））＆＃xA;＆＃xA; self.mapView.setRegion（region，animated：true）＆＃xA; self.locationManager.stopUpdatingLocation（）＆＃xA;＆＃xA;}＆＃xA;＆＃xA; func locationManager（manager：CLLocationManager，didFailWithError error：NSError）＆＃xA; {＆＃xA; print（“错误：”+ error.localizedDescription）＆＃xA;＆＃xA;}＆＃xA;＆＃xA;＆＃xA; func searchBarSearchButtonClicked（searchBar：UISearchBar）{＆＃xA; // 1＆＃XA; searchBar.resignFirstResponder（）＆＃XA; dismissViewControllerAnimated（true，completion：nil）＆＃xA; if self.mapView.annotations.count！= 0 {＆＃xA; annotation = self.mapView.annotations [0]＆＃xA; self.mapView.removeAnnotation（注释）＆＃XA; }＆＃XA; // 2＆＃XA; localSearchRequest = MKLocalSearchRequest（）＆＃xA; localSearchRequest.naturalLanguageQuery = searchBar.text＆＃xA; localSearch = MKLocalSearch（请求：localSearchRequest）＆＃xA; localSearch.startWithCompletionHandler {（localSearchResponse，error） - ＆gt;无效＆＃xA;＆＃xA;如果localSearchResponse == nil {＆＃xA; let alertController = UIAlertController（title：nil，message：“Place Not Found”，preferredStyle：UIAlertControllerStyle.Alert）＆＃xA; alertController.addAction（UIAlertAction（标题：“Dismiss”，样式：UIAlertActionStyle.Default，handler：nil））＆＃xA; self.presentViewController（alertController，animated：true，completion：nil）＆＃xA;返回＆＃XA; }＆＃XA; // 3＆＃XA; self.pointAnnotation = MKPointAnnotation（）＆＃xA; self.pointAnnotation.title = searchBar.text＆＃xA; self.pointAnnotation.coordinate = CLLocationCoordinate2D（纬度：localSearchResponse！.boundingRegion.center.latitude，经度：localSearchResponse！.boundingRegion.center.longitude）＆＃xA;＆＃xA;＆＃xA; self.pinAnnotationView = MKPinAnnotationView（注释：self.pointAnnotation，reuseIdentifier：nil）＆＃xA; self.mapView.centerCoordinate = self.pointAnnotation.coordinate＆＃xA; self.mapView.addAnnotation＆＃XA（self.pinAnnotationView.annotation！）;＆＃XA; }＆＃xA;}＆＃xA;＆＃xA; func hobo（）{＆＃xA; print（“testing”）＆＃xA;}＆＃xA;＆＃xA; @IBAction func showSearchBar（sender：AnyObject）{＆＃xA; searchController = UISearchController（searchResultsController：nil）＆＃xA; searchController.hidesNavigationBarDuringPresentation = false＆＃xA; self.searchController.searchBar.delegate = self＆＃xA; presentViewController（searchController，animated：true，completion：nil）＆＃xA;＆＃xA;}＆＃xA;＆＃xA;＆＃xA; @IBAction func locateMe（sender：AnyObject）{＆＃xA; self.mapView.showsUserLocation = true＆＃xA; self.locationManager.startUpdatingLocation（）＆＃XA; self.locationManager.delegate = self＆＃xA; self.locationManager.desiredAccuracy = kCLLocationAccuracyBest＆＃xA; self.locationManager.requestWhenInUseAuthorization（）＆＃XA;＆＃XA;＆＃XA; buyer1.center = CGPointMake（188.0,581.0）＆＃xA;＆＃xA; photographer1.center = CGPointMake（188.0,513.0）＆＃xA;＆＃xA;}＆＃xA;＆＃xA; @IBAction func photographer（sender：AnyObject）{＆＃xA;}＆＃xA;＆＃xA; @IBAction func买家（发件人：AnyObject）{＆＃xA;}＆＃xA;＆＃xA;}＆＃xA; ＆＃xA;