IOS MapKit框架的使用(专门用于地图显示)

青旅半醒 2021-10-01 02:52 448阅读 0赞

## ● MapKit框架使用前提 ##

● 导入框架

● 导入主头文件  
\#import <MapKit/MapKit.h>

●  MapKit框架使用须知

●  MapKit框架中所有数据类型的前缀都是MK

●  MapKit有一个比较重要的UI控件 :MKMapView,专门用于地图显示

## 跟踪显示用户的位置 ##

● 设置MKMapView的userTrackingMode属性可以跟踪显示用户的当前位置

● MKUserTrackingModeNone :不跟踪用户的位置

● MKUserTrackingModeFollow :跟踪并在地图上显示用户的当前位置

● MKUserTrackingModeFollowWithHeading :跟踪并在地图上显示用户的当前位 置,地图会跟随用户的前进方向进行旋转

● 下图是跟踪效果  
● 蓝色发光圆点就是用户的当前位置  
● 蓝色发光原点,专业术语叫做“大头针”

![496841-20170523163149476-771548052.png][]

## 地图的类型 ##

● 可以通过设置MKMapView的mapViewType设置地图类型  
● MKMapTypeStandard:普通地图(左图)  
● MKMapTypeSatellite:卫星云图(中图)  
● MKMapTypeHybrid:普通地图覆盖于卫星云图之上(右图)

![496841-20170523163319304-2077459598.png][]

## MKMapView的代理 ##

MKMapView可以设置一个代理对象,用来监听地图的相关行为

常见的代理方法有

\-(void)mapView:(MKMapView\*)mapViewdidUpdateUserLocation: (MKUserLocation \*)userLocation;

调用非常频繁,不断监测用户的当前位置

每次调用,都会把用户的最新位置(userLocation参数)传进来

\-(void)mapView:(MKMapView\*)mapViewregionWillChangeAnimated: (BOOL)animated;

地图的显示区域即将发生改变的时候调用

\-(void)mapView:(MKMapView\*)mapViewregionDidChangeAnimated: (BOOL)animated;

地图的显示区域已经发生改变的时候调用

### MKUserLocation ###

● MKUserLocation其实是个大头针模型,包括以下属性  
● @property(nonatomic,copy)NSString\*title;

• 显示在大头针上的标题

● @property(nonatomic,copy)NSString\*subtitle;

• 显示在大头针上的子标题

● @property(readonly,nonatomic)CLLocation\*location;

• 地理位置信息(大头针钉在什么地方?)

### 设置地图的显示 ###

通过MKMapView的下列方法,可以设置地图显示的位置和区域

1.设置地图的中心点位置

@property (nonatomic) CLLocationCoordinate2D centerCoordinate; - (void)setCenterCoordinate:(CLLocationCoordinate2D)coordinate

animated:(BOOL)animated; 2.设置地图的显示区域

@property (nonatomic) MKCoordinateRegion region;

- (void)setRegion:(MKCoordinateRegion)region animated: (BOOL)animated;

### MKCoordinateRegion ###

● MKCoordinateRegion是一个用来表示区域的结构体,定义如下

typedef struct \{

CLLocationCoordinate2D center; // 区域的中心点位置

MKCoordinateSpan span; // 区域的跨度

} MKCoordinateRegion;

● MKCoordinateSpan的定义

typedef struct \{

CLLocationDegrees latitudeDelta; // 纬度跨度

CLLocationDegrees longitudeDelta; // 经度跨度

\} MKCoordinateSpan;

### 大头针的基本操作 ###

● 添加一个大头针

● \-(void)addAnnotation:(id<MKAnnotation>)annotation;

● 添加多个大头针  
● \-(void)addAnnotations:(NSArray\*)annotations;

● 移除一个大头针  
● \-(void)removeAnnotation:(id<MKAnnotation>)annotation;

● 移除多个大头针  
● \-(void)removeAnnotations:(NSArray\*)annotations;

● (id<MKAnnotation>)annotation参数是什么东西?  
● 大头针模型对象:用来封装大头针的数据,比如大头针的位置、标题、子标题等数据

### 大头针模型 ###

● 新建一个大头针模型类

\#import <MapKit/MapKit.h>

@interface MJTuangouAnnotation : NSObject <MKAnnotation>  
/\*\* 坐标位置 \*/  
@property (nonatomic, assign) CLLocationCoordinate2D coordinate;

/\*\* 标题 \*/

@property (nonatomic, copy) NSString \*title;

/\*\* 子标题 \*/  
@property (nonatomic, copy) NSString \*subtitle;

@end

### 添加大头针 ###

MJTuangouAnnotation \*anno = \[\[MJTuangouAnnotation alloc\] init\];

anno.title = @"XX超市";  
anno.subtitle = @"地址:XX 公交是XX";

anno.coordinate = CLLocationCoordinate2DMake(40, 116);

\[self.mapView addAnnotation:anno\];

## 自定义大头针 ##

● 很多情况下,需要自定义大头针的显示样式,比如显示一张图片

![496841-20170523164541492-2071036264.png][]

### 自定义大头针 ###

● 如何自定义大头针

● 设置MKMapView的代理

● 实现下面的代理方法,返回大头针控件

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation; ●  根据传进来的(id <MKAnnotation>)annotation参数创建并返回对应的大头针控 件 ●  代理方法的使用注意 ●  如果返回nil,显示出来的大头针就采取系统的默认样式 ●  标识用户位置的蓝色发光圆点,它也是一个大头针,当显示这个大头针时,也会调用代 理方法 ●  因此,需要在代理方法中分清楚(id <MKAnnotation>)annotation参数代表自定 义的大头针还是蓝色发光圆点

\- (MKAnnotationView \*)mapView:(MKMapView \*)mapView viewForAnnotation: (id<MKAnnotation>)annotation

// 判断annotation的类型  
if (!\[annotation isKindOfClass:\[MJTuangouAnnotation class\]\]) return nil;

// 创建MKAnnotationView  
static NSString \*ID = @"tuangou";  
MKAnnotationView \*annoView = \[mapView dequeueReusableAnnotationViewWithIdentifier:ID\]; if (annoView == nil) \{

annoView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:ID];

annoView.canShowCallout = YES; }

// 传递模型数据

annoView.annotation = annotation;

// 设置图片  
MJTuangouAnnotation \*tuangouAnnotation = annotation;

annoView.image = \[UIImage imageNamed:tuangouAnnotation.icon\];

return annoView;

### MKAnnotationView ###

● 地图上的大头针控件是MKAnnotationView

● MKAnnotationView的属性

● @property(nonatomic,strong)id<MKAnnotation>annotation;

• 大头针模型

● @property(nonatomic,strong)UIImage\*image;

• 显示的图片

● @property(nonatomic)BOOLcanShowCallout;

• 是否显示标注

● @property(nonatomic)CGPointcalloutOffset;

• 标注的偏移量

● @property(strong,nonatomic)UIView\*rightCalloutAccessoryView;

• 标注右边显示什么控件

● @property(strong,nonatomic)UIView\*leftCalloutAccessoryView;

• 标注左边显示什么控件

### MKPinAnnotationView ###

● MKPinAnnotationView是MKAnnotationView的子类

● MKPinAnnotationView比MKAnnotationView多了2个属性

● @property(nonatomic)MKPinAnnotationColorpinColor;

• 大头针颜色

● @property(nonatomic)BOOLanimatesDrop;

• 大头针第一次显示时是否从天而降

实例：MpaKit基本使用

![ContractedBlock.gif][] ![ExpandedBlockStart.gif][]

/**
     CLLocation : 封装位置信息（经纬度、海拔）
     CLPlacemark : 封装地标信息（位置信息CLLocation、地名name、国家country）
     MKUserLocation : 封装地图上大头针的位置信息（位置信息CLLocation、标题title、子标题subtitle）
     CLLocationDegrees : 度数（经度、纬度）
     CLLocationCoordinate2D : 地理坐标（经度CLLocationDegrees longitude、纬度CLLocationDegrees latitude）
     MKCoordinateSpan : 跨度（经度跨度CLLocationDegrees longitudeDelta、纬度跨度CLLocationDegrees latitudeDelta）
     MKCoordinateRegion: 区域（中心位置CLLocationCoordinate2D center、区域跨度MKCoordinateSpan span）
     */
    
    #import "HMViewController.h"
    #import <MapKit/MapKit.h>
    
    @interface HMViewController () <MKMapViewDelegate, CLLocationManagerDelegate>
    @property (weak, nonatomic) IBOutlet MKMapView *mapView;
    @end
    
    @implementation HMViewController
    
    - (void)viewDidLoad
    {
        [super viewDidLoad];
        // 1.设置地图类型
        self.mapView.mapType = MKMapTypeStandard;
        
        // 2.设置跟踪模式(MKUserTrackingModeFollow == 跟踪)
        self.mapView.userTrackingMode = MKUserTrackingModeFollow;
        
        // 3.设置代理（监控地图的相关行为：比如显示的区域发生了改变）
        self.mapView.delegate = self;
    }
    
    #pragma mark - MKMapViewDelegate
    /**
     *  更新到用户的位置时就会调用(显示的位置、显示范围改变)
     *  userLocation : 大头针模型数据， 对大头针位置的一个封装（这里的userLocation描述的是用来显示用户位置的蓝色大头针）
     */
    - (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
    {
        userLocation.title = @"天朝帝都";
        userLocation.subtitle = @"帝都是个牛逼的地方";
    }
    
    /**
     *  地图显示的区域改变了就会调用(显示的位置、显示范围改变)
     */
    - (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated
    {
        CLLocationCoordinate2D center = mapView.region.center;
        MKCoordinateSpan span = mapView.region.span;
        
        NSLog(@"中心点=(%f, %f), 区域跨度=(%f, %f)", center.longitude, center.latitude, span.longitudeDelta, span.latitudeDelta);
    }
    
    /**
     *  地图显示的区域即将改变了就会调用
     */
    - (void)mapView:(MKMapView *)mapView regionWillChangeAnimated:(BOOL)animated
    {
    //    NSLog(@"regionWillChangeAnimated");
    }
    
    @end

实例：MpaKit \->显示特定位置和区域

![ContractedBlock.gif][] ![ExpandedBlockStart.gif][]

#import "HMViewController.h"
    #import <MapKit/MapKit.h>
    
    @interface HMViewController () <MKMapViewDelegate>
    @property (weak, nonatomic) IBOutlet MKMapView *mapView;
    - (IBAction)backToUserLocation;
    
    @end
    
    @implementation HMViewController
    
    - (void)viewDidLoad
    {
        [super viewDidLoad];
        
    //    [self.mapView setCenterCoordinate:<#(CLLocationCoordinate2D)#>];
        
        // 设置地图显示的中心位置
    //    CLLocationCoordinate2D coordinate = CLLocationCoordinate2DMake(39, 116);
    //    [self.mapView setCenterCoordinate:coordinate animated:YES];
        
        // 设置地图显示的区域
    //    [self.mapView setRegion:<#(MKCoordinateRegion)#>];
    //    CLLocationCoordinate2D center = CLLocationCoordinate2DMake(39, 116);
    //    MKCoordinateSpan span = MKCoordinateSpanMake(0.1, 0.1);
    //    MKCoordinateRegion region = MKCoordinateRegionMake(center, span);
    //    [self.mapView setRegion:region animated:YES];
        
        self.mapView.userTrackingMode = MKUserTrackingModeFollow;
        self.mapView.delegate = self;
    }
    
    #pragma mark - MKMapViewDelegate
    - (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
    {
    //    [mapView setCenterCoordinate:userLocation.location.coordinate animated:YES];
        CLLocationCoordinate2D center = userLocation.location.coordinate;
        MKCoordinateSpan span = MKCoordinateSpanMake(0.2509, 0.2256);
        MKCoordinateRegion region = MKCoordinateRegionMake(center, span);
        [self.mapView setRegion:region animated:YES];
    }
    
    //- (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated
    //{
    //    NSLog(@"%f %f", mapView.region.span.latitudeDelta, mapView.region.span.longitudeDelta);
    //}
    - (IBAction)backToUserLocation {
        CLLocationCoordinate2D center =  self.mapView.userLocation.location.coordinate;
        [self.mapView setCenterCoordinate:center animated:YES];
    }
    @end

实例：MpaKit ->添加大头针

![ContractedBlock.gif][] ![ExpandedBlockStart.gif][]

#import "HMViewController.h"
    #import <MapKit/MapKit.h>
    #import "HMAnnotation.h"
    
    @interface HMViewController () <MKMapViewDelegate>
    @property (weak, nonatomic) IBOutlet MKMapView *mapView;
    @end
    
    @implementation HMViewController
    
    - (void)viewDidLoad
    {
        [super viewDidLoad];
        
    //    HMAnnotation *anno1 = [[HMAnnotation alloc] init];
    //    anno1.coordinate = CLLocationCoordinate2DMake(39, 119);
    //    anno1.title = @"帝都";
    //    anno1.subtitle = @"帝都帝都帝都帝都帝都";
    //    // 添加一个大头针模型（模型：描述大头针的信息）
    //    [self.mapView addAnnotation:anno1];
    //    
    //    HMAnnotation *anno2 = [[HMAnnotation alloc] init];
    //    anno2.coordinate = CLLocationCoordinate2DMake(23, 116);
    //    anno2.title = @"广东";
    //    anno2.subtitle = @"广东广东广东广东广东";
    //    [self.mapView addAnnotation:anno2];
        
        /**
         纬度范围：N 3°51′ ~  N 53°33′
         经度范围：E 73°33′ ~  E 135°05′
         */
        
        for (int i = 0; i<100; i++) {
            CLLocationDegrees latitude = 23 + arc4random_uniform(20);
            CLLocationDegrees longitude = 73.2 + arc4random_uniform(50);
            
            HMAnnotation *anno = [[HMAnnotation alloc] init];
            anno.coordinate = CLLocationCoordinate2DMake(latitude, longitude);
            [self.mapView addAnnotation:anno];
        }
    }
    
    @end

实例：MpaKit ->自定义大头针

![ContractedBlock.gif][] ![ExpandedBlockStart.gif][]

#import <Foundation/Foundation.h>
    #import <MapKit/MapKit.h>
    
    @interface HMAnnotation : NSObject <MKAnnotation>
    @property (nonatomic, assign) CLLocationCoordinate2D coordinate;
    @property (nonatomic, copy) NSString *title;
    @property (nonatomic, copy) NSString *subtitle;
    /**
     *  图片名
     */
    @property (nonatomic, copy) NSString *icon;
    @end

![ContractedBlock.gif][] ![ExpandedBlockStart.gif][]

#import "HMAnnotationView.h"
    #import "HMAnnotation.h"
    
    @interface HMAnnotationView()
    @property (nonatomic, weak) UIImageView *iconView;
    @end
    
    @implementation HMAnnotationView
    
    + (instancetype)annotationViewWithMapView:(MKMapView *)mapView
    {
        static NSString *ID = @"anno";
        HMAnnotationView *annotationView = (HMAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:ID];
        if (annotationView == nil) {
            // 传入循环利用标识来创建大头针控件
            annotationView = [[HMAnnotationView alloc] initWithAnnotation:nil reuseIdentifier:ID];
        }
        return annotationView;
    }
    
    - (id)initWithAnnotation:(id<MKAnnotation>)annotation reuseIdentifier:(NSString *)reuseIdentifier
    {
        if (self = [super initWithAnnotation:annotation reuseIdentifier:reuseIdentifier]) {
            // 显示标题和子标题
            self.canShowCallout = YES;
            
            // 左边显示一个图片
            UIImageView *iconView = [[UIImageView alloc] init];
            iconView.bounds = CGRectMake(0, 0, 50, 50);
            self.leftCalloutAccessoryView = iconView;
            self.iconView = iconView;
        }
        return self;
    }
    
    - (void)setAnnotation:(HMAnnotation *)annotation
    {
        [super setAnnotation:annotation];
        
        self.image = [UIImage imageNamed:annotation.icon];
        self.iconView.image = self.image;
    }
    
    @end

![ContractedBlock.gif][] ![ExpandedBlockStart.gif][]

#import "HMViewController.h"
    #import <MapKit/MapKit.h>
    #import "HMAnnotation.h"
    #import "HMAnnotationView.h"
    
    @interface HMViewController () <MKMapViewDelegate>
    @property (weak, nonatomic) IBOutlet MKMapView *mapView;
    - (IBAction)add;
    
    @end
    
    @implementation HMViewController
    
    - (void)viewDidLoad
    {
        [super viewDidLoad];
        
        self.mapView.delegate = self;
        
        self.mapView.userTrackingMode = MKUserTrackingModeFollow;
    }
    
    - (IBAction)add {
    //    HMAnnotation *anno1 = [[HMAnnotation alloc] init];
    //    anno1.coordinate = CLLocationCoordinate2DMake(39, 119);
    //    anno1.title = @"帝都";
    //    anno1.subtitle = @"帝都帝都帝都帝都帝都";
    //    anno1.icon = @"me";
    //    [self.mapView addAnnotation:anno1];
    //    
    //    HMAnnotation *anno2 = [[HMAnnotation alloc] init];
    //    anno2.coordinate = CLLocationCoordinate2DMake(23, 116);
    //    anno2.title = @"广东";
    //    anno2.subtitle = @"广东广东广东广东广东";
    //    anno2.icon = @"other";
    //    [self.mapView addAnnotation:anno2];
        HMAnnotation *tg1 = [[HMAnnotation alloc] init];
        tg1.title = @"xxx大饭店";
        tg1.subtitle = @"全场一律15折，会员20折";
        tg1.icon = @"category_1";
        tg1.coordinate = CLLocationCoordinate2DMake(37, 116);
        [self.mapView addAnnotation:tg1];
        
        HMAnnotation *tg2 = [[HMAnnotation alloc] init];
        tg2.title = @"xxx影院";
        tg2.subtitle = @"最新大片：美国队长2，即将上映。。。";
        tg2.icon = @"category_5";
        tg2.coordinate = CLLocationCoordinate2DMake(29, 110);
        [self.mapView addAnnotation:tg2];
    }
    
    #pragma mark - MKMapViewDelegate
    - (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(HMAnnotation *)annotation
    {
        // 返回nil就会按照系统的默认做法
        if (![annotation isKindOfClass:[HMAnnotation class]]) return nil;
        
        // 1.获得大头针控件
        HMAnnotationView *annoView = [HMAnnotationView annotationViewWithMapView:mapView];
        
        // 2.传递模型
        annoView.annotation = annotation;
        
        return annoView;
    }
    
    //- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation
    //{
    //    // 1.先从缓存池中取出可以循环利用的大头针控件
    //    static NSString *ID = @"anno";
    //    MKPinAnnotationView *annotationView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:ID];
    //    
    //    // 2.缓存池中没有可以循环利用的大头针控件
    //    if (annotationView == nil) {
    //        // 传入循环利用标识来创建大头针控件
    //        annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:nil reuseIdentifier:ID];
    //        // 设置头的颜色
    //        annotationView.pinColor = MKPinAnnotationColorPurple;
    //        // 从天而降
    //        annotationView.animatesDrop = YES;
    //        // 显示标题和子标题
    //        annotationView.canShowCallout = YES;
    ////        annotationView.calloutOffset = CGPointMake(0, -10);
    ////        annotationView.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeContactAdd];
    ////        annotationView.leftCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeInfoDark];
    //        
    //        // 往大头针里面添加一个按钮（测试）
    ////        [annotationView addSubview:[UIButton buttonWithType:UIButtonTypeContactAdd]];
    //    }
    //    
    //    // 3.传递模型(更新大头针数据，覆盖掉之前的旧数据)
    //    annotationView.annotation = annotation;
    //    
    //    return annotationView;
    //}
    
    //- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(HMAnnotation *)annotation
    //{
    //    // 1.先从缓存池中取出可以循环利用的大头针控件
    //    static NSString *ID = @"anno";
    //    MKAnnotationView *annotationView = [mapView dequeueReusableAnnotationViewWithIdentifier:ID];
    //    
    //    // 2.缓存池中没有可以循环利用的大头针控件
    //    if (annotationView == nil) {
    //        // 传入循环利用标识来创建大头针控件
    //        annotationView = [[MKAnnotationView alloc] initWithAnnotation:nil reuseIdentifier:ID];
    //        // 显示标题和子标题
    //        annotationView.canShowCallout = YES;
    //    }
    //    
    //    // 3.传递模型(更新大头针数据，覆盖掉之前的旧数据)
    //    annotationView.annotation = annotation;
    //    
    //    // 4.设置图片
    //    annotationView.image = [UIImage imageNamed:annotation.icon];
    //    
    //    return annotationView;
    //}
    @end

实例：MpaKit ->在地图上画线

![ContractedBlock.gif][] ![ExpandedBlockStart.gif][]

#import "HMViewController.h"
    #import <MapKit/MapKit.h>
    #import "HMAnnotation.h"
    
    @interface HMViewController () <MKMapViewDelegate>
    @property (weak, nonatomic) IBOutlet MKMapView *mapView;
    @property (nonatomic, strong) CLGeocoder *geocoder;
    - (IBAction)startNavigation;
    
    @property (nonatomic, strong) MKPlacemark *sourceMKPm;
    @property (nonatomic, strong) MKPlacemark *destinationMKPm;
    @end
    
    @implementation HMViewController
    
    - (CLGeocoder *)geocoder
    {
        if (!_geocoder) {
            self.geocoder = [[CLGeocoder alloc] init];
        }
        return _geocoder;
    }
    
    - (IBAction)startNavigation {
        if (self.sourceMKPm == nil || self.destinationMKPm == nil) return;
        
        // 起点
        MKMapItem *sourceItem = [[MKMapItem alloc] initWithPlacemark:self.sourceMKPm];
        
        // 终点
        MKMapItem *destinationItem = [[MKMapItem alloc] initWithPlacemark:self.destinationMKPm];
        
        // 存放起点和终点
        NSArray *items = @[sourceItem, destinationItem];
        
        // 参数
        NSMutableDictionary *options = [NSMutableDictionary dictionary];
        // 导航模式：驾驶导航
        options[MKLaunchOptionsDirectionsModeKey] = MKLaunchOptionsDirectionsModeDriving;
        // 是否要显示路况
        options[MKLaunchOptionsShowsTrafficKey] = @YES;
        
        // 打开苹果官方的导航应用
        [MKMapItem openMapsWithItems:items launchOptions:options];
    }
    
    - (void)viewDidLoad
    {
        [super viewDidLoad];
        
        self.mapView.delegate = self;
        
        NSString *sourceAddress = @"广州";
        NSString *destinationAddress = @"帝都";
        
        [self.geocoder geocodeAddressString:sourceAddress completionHandler:^(NSArray *placemarks, NSError *error) {
            CLPlacemark *gzPm = [placemarks firstObject];
            if (gzPm == nil) return;
            
            // 添加广州大头针
            HMAnnotation *gzAnno = [[HMAnnotation alloc] init];
            gzAnno.coordinate = gzPm.location.coordinate;
            gzAnno.title = sourceAddress;
            gzAnno.subtitle = gzPm.name;
            [self.mapView addAnnotation:gzAnno];
            
            [self.geocoder geocodeAddressString:destinationAddress completionHandler:^(NSArray *placemarks, NSError *error) {
                CLPlacemark *bjPm = [placemarks firstObject];
                if (bjPm == nil) return;
                
                // 添加北京大头针
                HMAnnotation *bjAnno = [[HMAnnotation alloc] init];
                bjAnno.coordinate = bjPm.location.coordinate;
                bjAnno.title = destinationAddress;
                bjAnno.subtitle = bjPm.name;
                [self.mapView addAnnotation:bjAnno];
                
                [self drawLineWithSourceCLPm:gzPm destinationCLPm:bjPm];
            }];
        }];
    }
    
    - (void)drawLineWithSourceCLPm:(CLPlacemark *)sourceCLPm destinationCLPm:(CLPlacemark *)destinationCLPm
    {
        if (sourceCLPm == nil || destinationCLPm == nil) return;
        
        // 1.初始化方向请求
        // 方向请求
        MKDirectionsRequest *request = [[MKDirectionsRequest alloc] init];
        
        // 设置起点
        MKPlacemark *sourceMKPm = [[MKPlacemark alloc] initWithPlacemark:sourceCLPm];
        request.source = [[MKMapItem alloc] initWithPlacemark:sourceMKPm];
        self.sourceMKPm = sourceMKPm;
        
        // 设置终点
        MKPlacemark *destinationMKPm = [[MKPlacemark alloc] initWithPlacemark:destinationCLPm];
        request.destination = [[MKMapItem alloc] initWithPlacemark:destinationMKPm];
        self.destinationMKPm = destinationMKPm;
        
        // 2.根据请求创建方向
        MKDirections *directions = [[MKDirections alloc] initWithRequest:request];
        
        // 3.执行请求
        [directions calculateDirectionsWithCompletionHandler:^(MKDirectionsResponse *response, NSError *error) {
            if (error) return;
            
            for (MKRoute *route in response.routes) {
                // 添加路线遮盖（传递路线的遮盖模型数据）
                [self.mapView addOverlay:route.polyline];
            }
        }];
        
        // 遮盖 overlay
    }
    
    #pragma mark - 代理方法
    - (MKOverlayRenderer *)mapView:(MKMapView *)mapView rendererForOverlay:(id<MKOverlay>)overlay
    {
        MKPolylineRenderer *redender = [[MKPolylineRenderer alloc] initWithOverlay:overlay];
        redender.lineWidth = 5;
        redender.strokeColor = [UIColor blueColor];
        return redender;
    }
    
    @end

转载于:https://www.cnblogs.com/liuwj/p/6894782.html

[496841-20170523163149476-771548052.png]: /images/20210724/cd3e5e2f501749538b9b68e86c21e7c1.png
[496841-20170523163319304-2077459598.png]: /images/20210724/dda2349559004fd0b9cd3c169fc8c33a.png
[496841-20170523164541492-2071036264.png]: /images/20210724/3e01aeea398541c891bb00930f743549.png
[ContractedBlock.gif]: https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif
[ExpandedBlockStart.gif]: /images/20210724/68a8b844370c4e66bcf47f8e198249d3.png