ios iPhone：如何在 MapKit 上的两点之间画线？

Question

提问by Azhar

I have Latitude and Longitude of two points and Want to Draw line between these two points with Pin on MapKit.

我有两个点的纬度和经度，并且想要在 MapKit 上用 Pin 在这两个点之间画线。

I have googled but Could not find some suitable solution because the one I found was drawing overlay with array of Data points but I do not have any array of points between these two points.

我用谷歌搜索但找不到一些合适的解决方案，因为我发现的解决方案是用数据点数组绘制叠加层，但我在这两点之间没有任何点数组。

Just two points and want to draw line between these two points.

只有两点，想在这两点之间画一条线。

Please help.

请帮忙。

Answer 1

回答by graver

First make your view controller implement the MKMapViewDelegateprotocol and declare the properties you will need:

首先让你的视图控制器实现MKMapViewDelegate协议并声明你需要的属性：

@property (nonatomic, retain) MKMapView *mapView; //this is your map view
@property (nonatomic, retain) MKPolyline *routeLine; //your line
@property (nonatomic, retain) MKPolylineView *routeLineView; //overlay view

then in viewDidLoad(for example, or wherever you initialize)

然后在viewDidLoad（例如，或您初始化的任何地方）

//initialize your map view and add it to your view hierarchy - **set its delegate to self***
CLLocationCoordinate2D coordinateArray[2];
coordinateArray[0] = CLLocationCoordinate2DMake(lat1, lon1); 
coordinateArray[1] = CLLocationCoordinate2DMake(lat2, lon2);


self.routeLine = [MKPolyline polylineWithCoordinates:coordinateArray count:2];
[self.mapView setVisibleMapRect:[self.routeLine boundingMapRect]]; //If you want the route to be visible

[self.mapView addOverlay:self.routeLine];

then implement the MKMapViewDelegate's method -(MKOverlayView *)mapView:viewForOverlay:

然后实现MKMapViewDelegate的方法-(MKOverlayView *)mapView:viewForOverlay:

-(MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id<MKOverlay>)overlay
{
    if(overlay == self.routeLine)
    {
        if(nil == self.routeLineView)
        {
            self.routeLineView = [[[MKPolylineView alloc] initWithPolyline:self.routeLine] autorelease];
            self.routeLineView.fillColor = [UIColor redColor];
            self.routeLineView.strokeColor = [UIColor redColor];
            self.routeLineView.lineWidth = 5;

        }

        return self.routeLineView;
    }

    return nil;
}

You can adjust the code to fit your need, but it's pretty much straight forward for 2 or more points.

您可以调整代码以满足您的需要，但对于 2 点或更多点来说，这非常简单。

Answer 2

回答by Gami Nilesh

enter image description here

在此处输入图片说明

#import <MapKit/MapKit.h>   

- (void)viewDidLoad
{
        [mapview setDelegate:self];
        mapview.showsUserLocation = YES; 
}

- (CLLocationCoordinate2D)coordinateWithLocation:(NSDictionary*)location
{
    double latitude = [[location objectForKey:@"lat"] doubleValue];
    double longitude = [[location objectForKey:@"lng"] doubleValue];

    return CLLocationCoordinate2DMake(latitude, longitude);
}

- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation   *)userLocation
{

    MKCoordinateSpan span = MKCoordinateSpanMake(0.005, 0.005);
    MKCoordinateRegion region = MKCoordinateRegionMake(userLocation.location.coordinate, span);

    [mapview setRegion:region];

    [mapview setCenterCoordinate:userLocation.coordinate animated:YES];
    NSString *baseUrl = [NSString stringWithFormat:@"http://maps.googleapis.com/maps/api/directions/json?origin=%f,%f&destination=%@&sensor=true", mapview.userLocation.location.coordinate.latitude,  mapview.userLocation.location.coordinate.longitude, @"24.1620661,72.394131"];


    //http://maps.googleapis.com/maps/api/directions/json?origin=23.030000,72.580000&destination=23.400000,72.750000&sensor=true

    NSURL *url = [NSURL URLWithString:[baseUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];

    NSLog(@"%@",url);
    NSURLRequest *request = [NSURLRequest requestWithURL:url];

    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {

    NSError *error = nil;
    NSDictionary *result = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];

    NSArray *routes = [result objectForKey:@"routes"];
        NSLog(@"%@",routes);

    NSDictionary *firstRoute = [routes objectAtIndex:0];

    NSDictionary *leg =  [[firstRoute objectForKey:@"legs"] objectAtIndex:0];

    NSDictionary *end_location = [leg objectForKey:@"end_location"];

       NSLog(@"dDDDDDD>>>>>>%@",leg);
    double latitude = [[end_location objectForKey:@"lat"] doubleValue];
    double longitude = [[end_location objectForKey:@"lng"] doubleValue];

    CLLocationCoordinate2D coordinate = CLLocationCoordinate2DMake(latitude, longitude);

    MKPointAnnotation *point = [[MKPointAnnotation alloc] init];
    point.coordinate = coordinate;
    point.title =  [leg objectForKey:@"end_address"];
    point.subtitle = @"I'm here!!!";

    [self.mapview addAnnotation:point];

    NSArray *steps = [leg objectForKey:@"steps"];

    int stepIndex = 0;

    CLLocationCoordinate2D stepCoordinates[1  + [steps count] + 1];

    stepCoordinates[stepIndex] = userLocation.coordinate;

    for (NSDictionary *step in steps) {

        NSDictionary *start_location = [step objectForKey:@"start_location"];
        stepCoordinates[++stepIndex] = [self coordinateWithLocation:start_location];

        if ([steps count] == stepIndex){
            NSDictionary *end_location = [step objectForKey:@"end_location"];
            stepCoordinates[++stepIndex] = [self coordinateWithLocation:end_location];
        }
    }

    MKPolyline *polyLine = [MKPolyline polylineWithCoordinates:stepCoordinates count:1 + stepIndex];
    [mapview addOverlay:polyLine];

    CLLocationCoordinate2D centerCoordinate = CLLocationCoordinate2DMake((userLocation.location.coordinate.latitude + coordinate.latitude)/2, (userLocation.location.coordinate.longitude + coordinate.longitude)/2);

}];
}

then implement the MKMapViewDelegate's method -(MKOverlayView *)mapView:viewForOverlay:

然后实现 MKMapViewDelegate 的方法 -(MKOverlayView *)mapView:viewForOverlay:

- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay
{
    MKPolylineView *polylineView = [[MKPolylineView alloc] initWithPolyline:overlay];
    polylineView.strokeColor = [UIColor colorWithRed:204/255. green:45/255. blue:70/255. alpha:1.0];
    polylineView.lineWidth = 1;

    return polylineView;
}


- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
    static NSString *annotaionIdentifier=@"annotationIdentifier";
    MKPinAnnotationView *aView=(MKPinAnnotationView*)[mapView dequeueReusableAnnotationViewWithIdentifier:annotaionIdentifier ];
    if (aView==nil) {

        aView=[[MKPinAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:annotaionIdentifier];
        aView.pinColor = MKPinAnnotationColorRed;
        aView.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
        //        aView.image=[UIImage imageNamed:@"arrow"];
        aView.animatesDrop=TRUE;
        aView.canShowCallout = YES;
        aView.calloutOffset = CGPointMake(-5, 5);
    }

    return aView;
}

Answer 3

回答by Abhishek Singh

Please See this tutorial to draw polyline or route in mkmapview

请参阅本教程在 mkmapview 中绘制折线或路线

1>Draw route using mapkit

1>使用mapkit绘制路线

2>From versions above ios4.0 You can use MKOverlayPathView See Apple Docs

2>从ios4.0以上的版本可以使用MKOverlayPathView 查看Apple Docs

Sample code :-

示例代码：-

create PolyLine:-

创建折线：-

    -(void) loadRoute
    {
    NSString* filePath = [[NSBundle mainBundle] pathForResource:@”route” ofType:@”csv”];
    NSString* fileContents = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];
    NSArray* pointStrings = [fileContents componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

    MKMapPoint northEastPoint;
    MKMapPoint southWestPoint; 

   MKMapPoint* pointArr = malloc(sizeof(CLLocationCoordinate2D) * pointStrings.count);

    for(int idx = 0; idx < pointStrings.count; idx++)
    {
    NSString* currentPointString = [pointStrings objectAtIndex:idx];
    NSArray* latLonArr = [currentPointString componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@","]];

    CLLocationDegrees latitude = [[latLonArr objectAtIndex:0] doubleValue];
    CLLocationDegrees longitude = [[latLonArr objectAtIndex:1] doubleValue];

    CLLocationCoordinate2D coordinate = CLLocationCoordinate2DMake(latitude, longitude);

    MKMapPoint point = MKMapPointForCoordinate(coordinate);

        if (idx == 0) {
    northEastPoint = point;
    southWestPoint = point;
    }
    else
    {
    if (point.x > northEastPoint.x)
    northEastPoint.x = point.x;
    if(point.y > northEastPoint.y)
    northEastPoint.y = point.y;
    if (point.x < southWestPoint.x)
    southWestPoint.x = point.x;
    if (point.y < southWestPoint.y)
    southWestPoint.y = point.y;
    }

    pointArr[idx] = point;

    }

        self.routeLine = [MKPolyline polylineWithPoints:pointArr count:pointStrings.count];

    _routeRect = MKMapRectMake(southWestPoint.x, southWestPoint.y, northEastPoint.x - southWestPoint.x, northEastPoint.y - southWestPoint.y);

        free(pointArr);

    }

Display PoluLine :-

显示 PoluLine :-

[self.mapView addOverlay:self.routeLine];

Adding the overlay alone will not render anything on the map. Your MKMapViewDelegate implementation must return an overlay for this route you've just added as simply adding won't help .

单独添加叠加层不会在地图上呈现任何内容。您的 MKMapViewDelegate 实现必须为您刚刚添加的这条路线返回一个叠加层，因为简单地添加无济于事。

- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id )overlay
{
MKOverlayView* overlayView = nil;

if(overlay == self.routeLine)
{
//if we have not yet created an overlay view for this overlay, create it now.
if(nil == self.routeLineView)
{
self.routeLineView = [[[MKPolylineView alloc] initWithPolyline:self.routeLine] autorelease];
self.routeLineView.fillColor = [UIColor redColor];
self.routeLineView.strokeColor = [UIColor redColor];
self.routeLineView.lineWidth = 3;
}

overlayView = self.routeLineView;

}

return overlayView;

}

Answer 4

回答by Kaushik Movaliya

First of all Add frame work
    1 Foundation.framework
    2 CoreGraphics.framework
    3 CoreLocation.framework
    4 MapKit.framework

Then create nsobject file Like see.... TrailsMap.h File

然后创建 nsobject 文件 Like see.... TrailsMap.h 文件

#import <Foundation/Foundation.h>
#import <MapKit/MapKit.h>
@interface TrailsMap : NSObject<MKAnnotation>
{
    CLLocationCoordinate2D coordinate;

    NSString *title;
    NSString *image;
    NSString *subtitle;
}

@property (nonatomic, readonly) CLLocationCoordinate2D coordinate;
@property (nonatomic,copy) NSString *title;
@property (nonatomic,copy) NSString *image;
@property (nonatomic,copy) NSString *subtitle;

- (id)initWithLocation:(CLLocationCoordinate2D)coord;

TrailsMap.m

#import "TrailsMap.h"

@implementation TrailsMap
@synthesize coordinate,title,image,subtitle;

- (id)initWithLocation:(CLLocationCoordinate2D)coord{

    self = [super init];
    if (self) {
        coordinate = coord;

    }
    return self;
}

Now Create coding in mainview Please see..

现在在主视图中创建编码请参阅..

ViewController.h

视图控制器.h

#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>


@interface ViewController : UIViewController<MKMapViewDelegate>

@property (strong, nonatomic) IBOutlet MKMapView *MapView;
@property (nonatomic, retain) MKPolyline *routeLine;
@property (nonatomic, retain) MKPolylineView *routeLineView;

-(void)LoadMapRoute;
@end

Finally create coding in mainview.m file

最后在 mainview.m 文件中创建编码

ViewController.m

视图控制器.m

#import "ViewController.h"
#import "TrailsMap.h"

@interface ViewController ()
{
    NSData *alldata;
    NSMutableDictionary *data1;

   NSMutableArray *RouteLocation;
   NSMutableArray *RouteName;
}
@end

@implementation ViewController
@synthesize MapView,routeLine,routeLineView;


- (void)viewDidLoad
{
   [super viewDidLoad];

   RouteName = [[NSMutableArray alloc] initWithObjects:@"Ahmedabad",@"Rajkot", nil];
   RouteLocation = [[NSMutableArray alloc] initWithObjects:@"23.0300,72.5800",@"22.3000,70.7833", nil];
   [self LoadMapRoute];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
}


//-------------------------------------
// ************* Map ******************
//-------------------------------------

-(void)LoadMapRoute
{
    MKCoordinateSpan span = MKCoordinateSpanMake(0.8, 0.8);
    MKCoordinateRegion region;
    region.span = span;
    region.center= CLLocationCoordinate2DMake(23.0300,72.5800);


    // Distance between two address
   NSArray *coor1=[[RouteLocation objectAtIndex:0] componentsSeparatedByString:@","];
   CLLocation *locA = [[CLLocation alloc] initWithLatitude:[[coor1 objectAtIndex:0] doubleValue] longitude:[[coor1 objectAtIndex:1] doubleValue]];

   NSArray *coor2=[[RouteLocation objectAtIndex:1] componentsSeparatedByString:@","];
   CLLocation *locB = [[CLLocation alloc] initWithLatitude:[[coor2 objectAtIndex:0] doubleValue] longitude:[[coor2 objectAtIndex:1] doubleValue]];
    CLLocationDistance distance = [locA distanceFromLocation:locB];
    NSLog(@"Distance :%.0f Meters",distance);


   NSString *baseUrl = [NSString stringWithFormat:@"http://maps.googleapis.com/maps/api/directions/json?origin=%@&destination=%@&sensor=true", [RouteLocation objectAtIndex:0],[RouteLocation objectAtIndex:1] ];

   NSURL *url = [NSURL URLWithString:[baseUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
   alldata = [[NSData alloc] initWithContentsOfURL:url];

    NSError *err;
    data1 =[NSJSONSerialization JSONObjectWithData:alldata options:NSJSONReadingMutableContainers|NSJSONReadingMutableLeaves error:&err];

    if (err)
    {
        NSLog(@" %@",[err localizedDescription]);
    }

    NSArray *routes = [data1 objectForKey:@"routes"];
    NSDictionary *firstRoute = [routes objectAtIndex:0];
    NSDictionary *leg =  [[firstRoute objectForKey:@"legs"] objectAtIndex:0];
    NSArray *steps = [leg objectForKey:@"steps"];

    int stepIndex = 0;
    CLLocationCoordinate2D stepCoordinates[[steps count]+1 ];

    for (NSDictionary *step in steps)
    {

        NSDictionary *start_location = [step objectForKey:@"start_location"];
        double latitude = [[start_location objectForKey:@"lat"] doubleValue];
        double longitude = [[start_location objectForKey:@"lng"] doubleValue];
        stepCoordinates[stepIndex] = CLLocationCoordinate2DMake(latitude, longitude);

        if (stepIndex==0)
        {
            TrailsMap *point=[[TrailsMap alloc] initWithLocation:stepCoordinates[stepIndex]];
            point.title =[RouteName objectAtIndex:0];
            point.subtitle=[NSString stringWithFormat:@"Distance :%.0f Meters",distance];
            [self.MapView addAnnotation:point];
        }
        if (stepIndex==[steps count]-1)
        {
            stepIndex++;
            NSDictionary *end_location = [step objectForKey:@"end_location"];
            double latitude = [[end_location objectForKey:@"lat"] doubleValue];
            double longitude = [[end_location objectForKey:@"lng"] doubleValue];
            stepCoordinates[stepIndex] = CLLocationCoordinate2DMake(latitude, longitude);

            TrailsMap *point=[[TrailsMap alloc] initWithLocation:stepCoordinates[stepIndex]];
            point.title = [RouteName objectAtIndex:1];
            point.subtitle=[NSString stringWithFormat:@"Distance :%.0f Meters",distance];

            [self.MapView addAnnotation:point];
        }
        stepIndex++;
    }

    MKPolyline *polyLine = [MKPolyline polylineWithCoordinates:stepCoordinates count: stepIndex];
    [MapView addOverlay:polyLine];
    [MapView setRegion:region animated:YES];
}

- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay
{
    MKPolylineView *polylineView = [[MKPolylineView alloc] initWithPolyline:overlay];
    polylineView.strokeColor = [UIColor colorWithRed:204/255. green:45/255. blue:70/255. alpha:1.0];
    polylineView.lineWidth = 5;

    return polylineView;
}

If You want to set multiple pin in map then just add this code. Annotaion is Objectfile.

如果您想在地图中设置多个引脚，则只需添加此代码。注释是对象文件。

-(void)LoadMultiplePin
{
    RouteName = [[NSMutableArray alloc] initWithObjects:@"Ahmedabad",@"Rajkot",@"Limdi", nil];
    RouteLocation = [[NSMutableArray alloc] initWithObjects:@"23.0300,72.5800",@"22.3000,70.7833",@"22.5728,71.8114", nil];

    MKCoordinateSpan span = MKCoordinateSpanMake(2.9, 2.9);
    MKCoordinateRegion region;

    region.span = span;
    region.center= CLLocationCoordinate2DMake(22.5728,71.8114);

    int cnt=RouteLocation.count;

    for (int p=0 ; p<cnt ; p++ )
    {
        NSArray *coor=[[RouteLocation objectAtIndex:p] componentsSeparatedByString:@","];

        CLLocationCoordinate2D location=CLLocationCoordinate2DMake([[coor objectAtIndex:0] doubleValue],[[coor objectAtIndex:1] doubleValue]);

        Annotaion *point=[[Annotaion alloc] initWithLocation:location];
        point.title =[RouteName objectAtIndex:p];
        [Map addAnnotation:point];
    }
    [Map setRegion:region animated:YES];

}

By using this code You can easily Drope two pin and draw line between that two Pin Enjoy Happy Coding...:)

通过使用此代码，您可以轻松地Drope两个pin和两个引脚之间画线享受快乐编码... :)

Answer 5

回答by Leon

I took the great answer from @graver and did this for Swift 3:

我从@graver 那里得到了很好的答案，并为 Swift 3 做了这个：

// Called from viewDidLoad
func setupMap() {
    mapView.delegate = self
    // BusStop implements the MKAnnotation protocol, I have an array of them
    let routeCoordinates = busStops.map({ -(NSArray*) calculateRoutesFrom:(CLLocationCoordinate2D) f to: (CLLocationCoordinate2D) t {
    NSString* saddr = [NSString stringWithFormat:@"%f,%f", f.latitude, f.longitude];
    NSString* daddr = [NSString stringWithFormat:@"%f,%f", t.latitude, t.longitude];

NSString* apiUrlStr = [NSString stringWithFormat:@"http://maps.google.com/maps?             output=dragdir&saddr=%@&daddr=%@", saddr, daddr];
//    NSString* apiUrlStr = @"http://maps.google.com/maps?output=dragdir&saddr=40.769264,-73.958995&daddr=47.286522,-122.312932";
NSURL* apiUrl = [NSURL URLWithString:apiUrlStr];
NSLog(@"api url: %@", apiUrl);
NSString *apiResponse = [NSString stringWithContentsOfURL:apiUrl encoding:NSUTF8StringEncoding error:nil];
NSString* encodedPoints = [apiResponse stringByMatching:@"points:\\"([^\\"]*)\\"" capture:1L];
return [self decodePolyLine:[encodedPoints mutableCopy]];
}


-(NSMutableArray *)decodePolyLine: (NSMutableString *)encoded {
    [encoded replaceOccurrencesOfString:@"\\" withString:@"\"
                                options:NSLiteralSearch
                                  range:NSMakeRange(0, [encoded length])];
    NSInteger len = [encoded length];
    NSInteger index = 0;
    NSMutableArray *array = [[NSMutableArray alloc] init];
    NSInteger lat=0;
    NSInteger lng=0;
    while (index < len) {
        NSInteger b;
        NSInteger shift = 0;
        NSInteger result = 0;
        do {
            b = [encoded characterAtIndex:index++] - 63;
            result |= (b & 0x1f) << shift;
            shift += 5;
        } while (b >= 0x20);
        NSInteger dlat = ((result & 1) ? ~(result >> 1) : (result >> 1));
        lat += dlat;
        shift = 0;
        result = 0;
        do {
            b = [encoded characterAtIndex:index++] - 63;
            result |= (b & 0x1f) << shift;
            shift += 5;
        } while (b >= 0x20);
        NSInteger dlng = ((result & 1) ? ~(result >> 1) : (result >> 1));
        lng += dlng;
        NSNumber *latitude = [[NSNumber alloc] initWithFloat:lat * 1e-5];
        NSNumber *longitude = [[NSNumber alloc] initWithFloat:lng * 1e-5];
        printf("[%f,", [latitude doubleValue]);
        printf("%f]", [longitude doubleValue]);
        CLLocation *loc = [[CLLocation alloc] initWithLatitude:[latitude floatValue] longitude:[longitude floatValue]];
        [array addObject:loc];
    }

    return array;
}

-(void) updateRouteView:(UIColor *)clr {
    CGContextRef context =CGBitmapContextCreate(nil,routeView.frame.size.width,routeView.frame.size.height,8,4 * routeView.frame.size.width,CGColorSpaceCreateDeviceRGB(), kCGImageAlphaPremultipliedLast);

    CGContextSetStrokeColorWithColor(context, clr.CGColor);
    CGContextSetRGBFillColor(context, 0.0, 0.0, 1.0, 1.0);
    CGContextSetLineWidth(context, 3.0);

    for(int i = 0; i < routes.count; i++) {
        CLLocation* location = [routes objectAtIndex:i];
        CGPoint point = [mapView convertCoordinate:location.coordinate toPointToView:routeView];

        if(i == 0) {
            CGContextMoveToPoint(context, point.x, routeView.frame.size.height - point.y);
        } else {
            CGContextAddLineToPoint(context, point.x, routeView.frame.size.height - point.y);

        }
    }

    CGContextStrokePath(context);

    CGImageRef image = CGBitmapContextCreateImage(context);
    UIImage* img = [UIImage imageWithCGImage:image];

    routeView.image = img;
    CGContextRelease(context);

}
.coordinate })
    let routeLine = MKPolyline(coordinates: routeCoordinates, count: routeCoordinates.count)
    mapView.setVisibleMapRect(routeLine.boundingMapRect, animated: false)
    mapView.add(routeLine)
}

// MARK: MKMapViewDelegate

func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
    if let polyline = overlay as? MKPolyline {
        let polylineRenderer = MKPolylineRenderer(overlay: polyline)
        polylineRenderer.strokeColor = .blue
        polylineRenderer.lineWidth = 3
        return polylineRenderer
    }
    return MKOverlayRenderer(overlay: overlay)
}

Answer 6

回答by Avinash Meghanathi

pass your address cordination

通过您的地址编码

@IBOutlet weak var mapView:MKMapView!
var locationManager: CLLocationManager!
var routeArr:[CLLocationCoordinate2D] = []
var isStarted:Bool = false

// MARK:- Life cycle
override func viewDidLoad() {
    super.viewDidLoad()

    locationManager = CLLocationManager()
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    locationManager.delegate = self;
    locationManager.startMonitoringSignificantLocationChanges()
    locationManager.allowsBackgroundLocationUpdates = true
    locationManager.pausesLocationUpdatesAutomatically = false

    // user activated automatic authorization info mode
    let status = CLLocationManager.authorizationStatus()
    if status == .notDetermined || status == .denied || status == .authorizedWhenInUse {
           // present an alert indicating location authorization required
           // and offer to take the user to Settings for the app via
           // UIApplication -openUrl: and UIApplicationOpenSettingsURLString
           locationManager.requestAlwaysAuthorization()
           locationManager.requestWhenInUseAuthorization()
       }

    locationManager.startUpdatingLocation()
    locationManager.startUpdatingHeading()

    mapView.delegate = self
    mapView.showsUserLocation = true
    mapView.mapType = MKMapType(rawValue: 0)!
    mapView.userTrackingMode = MKUserTrackingMode(rawValue: 2)!
}

// MARK:- Button Actions

@IBAction func startBtnClick(_ sender: Any) {
    isStarted = true
}

@IBAction func endBtnClick(_ sender: Any) {
    isStarted = false
    routeArr.removeAll()
}

// MARK:- LocationManager Delegate

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    let location = locations.last

    if isStarted == true {
        if locations.count > 0 {
            let newLocation:CLLocationCoordinate2D = (location?.coordinate ?? nil)!
            routeArr.append(newLocation)
            DispatchQueue.main.async {
                if self.routeArr.count > 2 {
                    let route:[CLLocationCoordinate2D] = [self.routeArr[self.routeArr.count - 2] ,self.routeArr.last!]
                    print(route)
                    let polyline = MKPolyline(coordinates: route, count: route.count)
                    self.mapView.addOverlay(polyline)
                }
            }
        }
    }
}

func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
    if (overlay is MKPolyline) {
        let pr = MKPolylineRenderer(overlay: overlay)
        pr.strokeColor = UIColor.red
        pr.fillColor = .green
        pr.lineWidth = 5
        return pr
    }else {
      return MKOverlayRenderer()
    }
}

Answer 7

回答by Bhavsang Jam

I have created demo in swift with continue update location on map with polyline.

我已经快速创建了演示，并使用折线继续更新地图上的位置。

Please follow below steps :

请按照以下步骤操作：

1) Create new project and set up required things. 2) Go to project target->Build Phases -> Link Binary with Libraries and add MapKit.framwork, CoreLocation.framework. 3) Go to sotryboard and add mapview and linkup with your viewcontroller. 4) Add properties and delegates that i am providing code below.

1）创建新项目并设置所需的东西。2）转到项目目标->构建阶段->链接二进制与库并添加 MapKit.framework，CoreLocation.framework。3）转到sotryboard并添加mapview和与您的viewcontroller的链接。4）添加我在下面提供代码的属性和委托。

ViewController.Swift

视图控制器.Swift

import UIKit

导入 UIKit

import MapKit

导入 MapKit

import CoreLocation

导入核心位置

class ViewController: UIViewController,CLLocationManagerDelegate,MKMapViewDelegate{

类 ViewController: UIViewController,CLLocationManagerDelegate,MKMapViewDelegate{

   directionsRequest.transportType = MKDirectionsTransportType.automobile

        //Draw polyline by using MKRoute so it follows the street roads...
        for (k, item) in arrayarrayPlacemarks.enumerated() {
            if k < (arrayarrayPlacemarks.count - 1) {
                directionsRequest.source = item
                directionsRequest.destination = arrayarrayPlacemarks[k+1]

                let directions = MKDirections(request: directionsRequest)
          directions.calculate { (response:MKDirections.Response!, error: Error!) -> Void in
                    if error == nil {
                        self.locRoute = response.routes[0] as? MKRoute
                        let geodesic:MKPolyline = self.locRoute!.polyline
                        self.mapView.addOverlay(geodesic)
                    }
                }
            }
        }

}

Run your project and click on start button for tracking and you can see polyline on map. If you click on stop button then it will stop to draw polyline.

运行您的项目并单击开始按钮进行跟踪，您可以在地图上看到折线。如果您单击停止按钮，它将停止绘制折线。

Thankyou

谢谢

Answer 8

回答by Mr.Javed Multani

Get full code:https://github.com/javedmultani16/MapKitWithPolyLine

获取完整代码：https: //github.com/javedmultani16/MapKitWithPolyLine

Draw line like:

画线如下：

  func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
        if overlay.isKind(of: MKPolyline.self){
                var polylineRenderer = MKPolylineRenderer(overlay: overlay)
                polylineRenderer.fillColor = UIColor.blue
                polylineRenderer.strokeColor = UIColor.blue
                polylineRenderer.lineWidth = 2

            return polylineRenderer
     }
        return MKOverlayRenderer(overlay: overlay)
    }

Delegate method :

委托方法：

##代码##

Answer 9

回答by MCKapur

You can draw lines in map using MKPolyline.

您可以使用 MKPolyline 在地图中绘制线条。

See this link

看这个链接

http://spitzkoff.com/craig/?p=136

ALSO:

还：

https://github.com/kishikawakatsumi/MapKit-Route-Directions

http://cloudmade.com/

These are all tutorials and open source libraries which you can easily refer to. Currently MapKit does notsupport this feature...

这些都是您可以轻松参考的教程和开源库。目前 MapKit不支持此功能...

Answer 10

回答by Paras Joshi

here you must calculate the route with its latitude and longtitude and then draw the poly line on MapView........ I do this things in my app....i draw route on mapview with all information....

在这里你必须用它的纬度和经度计算路线，然后在 MapView 上绘制折线......我在我的应用程序中做这些事情......我在带有所有信息的地图视图上绘制路线......

here if you MapKit and also use RagexKitLite then its too simple for you just get Demo of RagexKitLite....

在这里，如果您使用 MapKit 并使用 RagexKitLite，那么它太简单了，您只需获得 RagexKitLite 的 Demo ....

ios iPhone：如何在 MapKit 上的两点之间画线？

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