地图划线Demo

#import "ViewController.h"
#import <MapKit/MapKit.h>
#import <CoreLocation/CoreLocation.h>
#import "HLannotation.h"
@interface ViewController ()<MKMapViewDelegate>


//位置管理者
@property (nonatomic,strong) CLLocationManager *manager ;

//地图
@property (nonatomic,strong) MKMapView *mapView ;

//显示我的位置2D坐标
@property (nonatomic) CLLocationCoordinate2D locationCoordinate2D ;

//目的地的2D坐标
@property (nonatomic) CLLocationCoordinate2D desCoordinate2D ;


@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
   
    self.mapView = [[MKMapView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, 600)];
    [self.view addSubview:_mapView];
    
    self.manager = [[CLLocationManager alloc] init];
    if ([[UIDevice currentDevice].systemVersion floatValue] >=8.0) {
        
        [self.manager requestAlwaysAuthorization];
        
        [self.manager requestWhenInUseAuthorization];
    }
    
    //设置目的地的位置
    self.desCoordinate2D = CLLocationCoordinate2DMake(23.123, 113.123) ;
    
    self.mapView.delegate = self ;
    
}


#pragma mark --起点关联的方法
- (IBAction)btnAction1:(UIButton *)sender {
    
    self.mapView.showsUserLocation = YES ;
}

#pragma mark --目的地关联的方法
- (IBAction)btnAction2:(UIButton *)sender {
    
//    self.locationCoordinate2D = self.mapView.userLocation.coordinate ;
    
    //创建一个标注视图
    HLannotation *annotation = [[HLannotation alloc] init];
    
    //为标注视图标注位置
    annotation.coordinate = self.desCoordinate2D ;
    annotation.title = @"天河区";
    annotation.subtitle = @"天源路";
    
    //讲标注视图添加到地图上面
    [self.mapView addAnnotation:annotation];
    
    //对地图的比例尺和区域范围进行设置
    MKCoordinateRegion region ;
    region.span.latitudeDelta = 0.5 ;
    region.span.longitudeDelta = 0.5 ;
    region.center = self.desCoordinate2D ;
    [self.mapView setRegion:region];
    
}

#pragma mark --路线关联的方法
- (IBAction)btnAction3:(UIButton *)sender {
    
    //1.拿到起点和终点的坐标
    CLLocationCoordinate2D formCoordinate2D = self.locationCoordinate2D ;
    CLLocationCoordinate2D toCoordinate2D = self.desCoordinate2D ;
    
    //2.将2D坐标类型的位置转化为MKplace
    MKPlacemark *formPlaceMark = [[MKPlacemark alloc] initWithCoordinate:formCoordinate2D addressDictionary:nil];
    MKPlacemark *toPlaceMark = [[MKPlacemark alloc] initWithCoordinate:toCoordinate2D addressDictionary:nil];
    
    //3.用placeMark创建mapItem
    MKMapItem *formItem = [[MKMapItem alloc] initWithPlacemark:formPlaceMark];
    MKMapItem *toItem = [[MKMapItem alloc] initWithPlacemark:toPlaceMark];
    
    
    //4.请求两点之间的路线
    //>>>>1.创建一个方向请求
    MKDirectionsRequest *request = [[MKDirectionsRequest alloc] init];
    request.source = formItem ;
    request.destination = toItem ;
    
    //如果来那点之间有多条线路返回多条，默认NO
    request.requestsAlternateRoutes = YES ;
    
    //5.创建一个线路信息
    MKDirections *directions = [[MKDirections alloc] initWithRequest:request];
    
    //6.画出路线
    [directions calculateDirectionsWithCompletionHandler:^(MKDirectionsResponse *response, NSError *error) {
       
        if (error) {
            
            NSLog(@"请检查你的网络...");
        }
        else
        {
            //创建一个线路
            MKRoute *route = [response.routes firstObject];
            
            //把路线在地图上显示出来
            [self.mapView addOverlay:route.polyline];
        }
        
    }];
    
    
}


#pragma mark --自定义地图上线路的方法
-(MKOverlayRenderer *)mapView:(MKMapView *)mapView rendererForOverlay:(id<MKOverlay>)overlay
{
    
    MKPolylineRenderer *renderer = [[MKPolylineRenderer alloc] initWithOverlay:overlay];
    
    //
    renderer.lineWidth = 5.0f ;
    renderer.strokeColor = [UIColor purpleColor];
    return renderer ;
    
}
#pragma mark --更细用户的位置
-(void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
    self.locationCoordinate2D = self.mapView.userLocation.coordinate ;
}

自定义标注视图：继承NSObject

#import <Foundation/Foundation.h>
#import <MapKit/MapKit.h>
@interface HLannotation : NSObject<MKAnnotation> //必需遵守的协议
//必选
@property (nonatomic) CLLocationCoordinate2D coordinate;
//可选
@property (nonatomic, copy) NSString *title;
@property (nonatomic, copy) NSString *subtitle;

@end