IOS MapKit框架的使用(專門用於地圖顯示)

● MapKit框架使用前提

● 導入框架

● 導入主頭文件
#import <MapKit/MapKit.h>

 

●  MapKit框架使用須知

●  MapKit框架中所有數據類型的前綴都是MK

●  MapKit有一個比較重要的UI控件 :MKMapView,專門用於地圖顯示

 

跟蹤顯示用戶的位置

● 設置MKMapView的userTrackingMode屬性可以跟蹤顯示用戶的當前位置

● MKUserTrackingModeNone :不跟蹤用戶的位置

● MKUserTrackingModeFollow :跟蹤並在地圖上顯示用戶的當前位置

● MKUserTrackingModeFollowWithHeading :跟蹤並在地圖上顯示用戶的當前位 置,地圖會跟隨用戶的前進方向進行旋轉

 

● 下圖是跟蹤效果
● 藍色發光圓點就是用戶的當前位置
● 藍色發光原點,專業術語叫做“大頭針”

 

地圖的類型

● 可以通過設置MKMapView的mapViewType設置地圖類型
● MKMapTypeStandard:普通地圖(左圖)
● MKMapTypeSatellite:衛星雲圖(中圖)
● MKMapTypeHybrid:普通地圖覆蓋於衛星雲圖之上(右圖)

 

 

MKMapView的代理

 

MKMapView可以設置一個代理對象,用來監聽地圖的相關行為

常見的代理方法有

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

調用非常頻繁,不斷監測用戶的當前位置

每次調用,都會把用戶的最新位置(userLocation參數)傳進來

 

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

地圖的顯示區域即將發生改變的時候調用

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

地圖的顯示區域已經發生改變的時候調用

MKUserLocation

● MKUserLocation其實是個大頭針模型,包括以下屬性
● @property(nonatomic,copy)NSString*title;

 • 顯示在大頭針上的標題

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

• 顯示在大頭針上的子標題

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

• 地理位置信息(大頭針釘在什么地方?)

 

 

設置地圖的顯示

通過MKMapView的下列方法,可以設置地圖顯示的位置和區域

1.設置地圖的中心點位置

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

animated:(BOOL)animated; 

2.設置地圖的顯示區域 

@property (nonatomic) MKCoordinateRegion region; 

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

MKCoordinateRegion

● MKCoordinateRegion是一個用來表示區域的結構體,定義如下

typedef struct {

CLLocationCoordinate2D center; // 區域的中心點位置

MKCoordinateSpan span; // 區域的跨度

} MKCoordinateRegion;

● MKCoordinateSpan的定義

typedef struct {

CLLocationDegrees latitudeDelta; // 緯度跨度

CLLocationDegrees longitudeDelta; // 經度跨度

} MKCoordinateSpan;

 

大頭針的基本操作

 ● 添加一個大頭針

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

 ● 添加多個大頭針
● -(void)addAnnotations:(NSArray*)annotations;

● 移除一個大頭針
● -(void)removeAnnotation:(id<MKAnnotation>)annotation;

● 移除多個大頭針
● -(void)removeAnnotations:(NSArray*)annotations;

● (id<MKAnnotation>)annotation參數是什么東西?
● 大頭針模型對象:用來封裝大頭針的數據,比如大頭針的位置、標題、子標題等數據

 

 

大頭針模型

● 新建一個大頭針模型類

#import <MapKit/MapKit.h>

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

/** 標題 */

@property (nonatomic, copy) NSString *title;

/** 子標題 */
@property (nonatomic, copy) NSString *subtitle;

@end

 

添加大頭針

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];

 

自定義大頭針

● 很多情況下,需要自定義大頭針的顯示樣式,比如顯示一張圖片

 

 

自定義大頭針

● 如何自定義大頭針

 

● 設置MKMapView的代理

● 實現下面的代理方法,返回大頭針控件

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation;
●  根據傳進來的(id <MKAnnotation>)annotation參數創建並返回對應的大頭針控 件 

●  代理方法的使用注意 

●  如果返回nil,顯示出來的大頭針就采取系統的默認樣式 

●  標識用戶位置的藍色發光圓點,它也是一個大頭針,當顯示這個大頭針時,也會調用代 理方法 

●  因此,需要在代理方法中分清楚(id <MKAnnotation>)annotation參數代表自定 義的大頭針還是藍色發光圓點 

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

{

// 判斷annotation的類型
if (![annotation isKindOfClass:[MJTuangouAnnotation class]]) return nil;

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

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

       annoView.canShowCallout = YES; } 

// 傳遞模型數據

annoView.annotation = annotation;

 

// 設置圖片
MJTuangouAnnotation *tuangouAnnotation = annotation;

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

return annoView; 

}

 

 

 

MKAnnotationView

● 地圖上的大頭針控件是MKAnnotationView

● MKAnnotationView的屬性

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

• 大頭針模型

 

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

• 顯示的圖片

 

● @property(nonatomic)BOOLcanShowCallout;

• 是否顯示標注

 

● @property(nonatomic)CGPointcalloutOffset;

• 標注的偏移量

 

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

• 標注右邊顯示什么控件

 

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

• 標注左邊顯示什么控件

 

MKPinAnnotationView

 ● MKPinAnnotationView是MKAnnotationView的子類

● MKPinAnnotationView比MKAnnotationView多了2個屬性

 

● @property(nonatomic)MKPinAnnotationColorpinColor;

• 大頭針顏色

 

● @property(nonatomic)BOOLanimatesDrop;

• 大頭針第一次顯示時是否從天而降

實例：MpaKit基本使用

 

/**
 CLLocation : 封裝位置信息（經緯度、海拔）
 CLPlacemark : 封裝地標信息（位置信息CLLocation、地名name、國家country）
 MKUserLocation : 封裝地圖上大頭針的位置信息（位置信息CLLocation、標題title、子標題subtitle）
 CLLocationDegrees : 度數（經度、緯度）
 CLLocationCoordinate2D : 地理坐標（經度CLLocationDegrees longitude、緯度CLLocationDegrees latitude）
 MKCoordinateSpan : 跨度（經度跨度CLLocationDegrees longitudeDelta、緯度跨度CLLocationDegrees latitudeDelta）
 MKCoordinateRegion: 區域（中心位置CLLocationCoordinate2D center、區域跨度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.設置地圖類型
    self.mapView.mapType = MKMapTypeStandard;
    
    // 2.設置跟蹤模式(MKUserTrackingModeFollow == 跟蹤)
    self.mapView.userTrackingMode = MKUserTrackingModeFollow;
    
    // 3.設置代理（監控地圖的相關行為：比如顯示的區域發生了改變）
    self.mapView.delegate = self;
}

#pragma mark - MKMapViewDelegate
/**
 *  更新到用戶的位置時就會調用(顯示的位置、顯示范圍改變)
 *  userLocation : 大頭針模型數據， 對大頭針位置的一個封裝（這里的userLocation描述的是用來顯示用戶位置的藍色大頭針）
 */
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
    userLocation.title = @"天朝帝都";
    userLocation.subtitle = @"帝都是個牛逼的地方";
}

/**
 *  地圖顯示的區域改變了就會調用(顯示的位置、顯示范圍改變)
 */
- (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated
{
    CLLocationCoordinate2D center = mapView.region.center;
    MKCoordinateSpan span = mapView.region.span;
    
    NSLog(@"中心點=(%f, %f), 區域跨度=(%f, %f)", center.longitude, center.latitude, span.longitudeDelta, span.latitudeDelta);
}

/**
 *  地圖顯示的區域即將改變了就會調用
 */
- (void)mapView:(MKMapView *)mapView regionWillChangeAnimated:(BOOL)animated
{
//    NSLog(@"regionWillChangeAnimated");
}

@end

 

實例：MpaKit ->顯示特定位置和區域

 

#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)#>];
    
    // 設置地圖顯示的中心位置
//    CLLocationCoordinate2D coordinate = CLLocationCoordinate2DMake(39, 116);
//    [self.mapView setCenterCoordinate:coordinate animated:YES];
    
    // 設置地圖顯示的區域
//    [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

 

實例：MpaKit ->添加大頭針

#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";
//    // 添加一個大頭針模型（模型：描述大頭針的信息）
//    [self.mapView addAnnotation:anno1];
//    
//    HMAnnotation *anno2 = [[HMAnnotation alloc] init];
//    anno2.coordinate = CLLocationCoordinate2DMake(23, 116);
//    anno2.title = @"廣東";
//    anno2.subtitle = @"廣東廣東廣東廣東廣東";
//    [self.mapView addAnnotation:anno2];
    
    /**
     緯度范圍：N 3°51′ ~  N 53°33′
     經度范圍：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

實例：MpaKit ->自定義大頭針

#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;
/**
 *  圖片名
 */
@property (nonatomic, copy) NSString *icon;
@end

#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) {
        // 傳入循環利用標識來創建大頭針控件
        annotationView = [[HMAnnotationView alloc] initWithAnnotation:nil reuseIdentifier:ID];
    }
    return annotationView;
}

- (id)initWithAnnotation:(id<MKAnnotation>)annotation reuseIdentifier:(NSString *)reuseIdentifier
{
    if (self = [super initWithAnnotation:annotation reuseIdentifier:reuseIdentifier]) {
        // 顯示標題和子標題
        self.canShowCallout = YES;
        
        // 左邊顯示一個圖片
        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

#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 = @"廣東";
//    anno2.subtitle = @"廣東廣東廣東廣東廣東";
//    anno2.icon = @"other";
//    [self.mapView addAnnotation:anno2];
    HMAnnotation *tg1 = [[HMAnnotation alloc] init];
    tg1.title = @"xxx大飯店";
    tg1.subtitle = @"全場一律15折，會員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：美國隊長2，即將上映。。。";
    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就會按照系統的默認做法
    if (![annotation isKindOfClass:[HMAnnotation class]]) return nil;
    
    // 1.獲得大頭針控件
    HMAnnotationView *annoView = [HMAnnotationView annotationViewWithMapView:mapView];
    
    // 2.傳遞模型
    annoView.annotation = annotation;
    
    return annoView;
}

//- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation
//{
//    // 1.先從緩存池中取出可以循環利用的大頭針控件
//    static NSString *ID = @"anno";
//    MKPinAnnotationView *annotationView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:ID];
//    
//    // 2.緩存池中沒有可以循環利用的大頭針控件
//    if (annotationView == nil) {
//        // 傳入循環利用標識來創建大頭針控件
//        annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:nil reuseIdentifier:ID];
//        // 設置頭的顏色
//        annotationView.pinColor = MKPinAnnotationColorPurple;
//        // 從天而降
//        annotationView.animatesDrop = YES;
//        // 顯示標題和子標題
//        annotationView.canShowCallout = YES;
////        annotationView.calloutOffset = CGPointMake(0, -10);
////        annotationView.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeContactAdd];
////        annotationView.leftCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeInfoDark];
//        
//        // 往大頭針里面添加一個按鈕（測試）
////        [annotationView addSubview:[UIButton buttonWithType:UIButtonTypeContactAdd]];
//    }
//    
//    // 3.傳遞模型(更新大頭針數據，覆蓋掉之前的舊數據)
//    annotationView.annotation = annotation;
//    
//    return annotationView;
//}

//- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(HMAnnotation *)annotation
//{
//    // 1.先從緩存池中取出可以循環利用的大頭針控件
//    static NSString *ID = @"anno";
//    MKAnnotationView *annotationView = [mapView dequeueReusableAnnotationViewWithIdentifier:ID];
//    
//    // 2.緩存池中沒有可以循環利用的大頭針控件
//    if (annotationView == nil) {
//        // 傳入循環利用標識來創建大頭針控件
//        annotationView = [[MKAnnotationView alloc] initWithAnnotation:nil reuseIdentifier:ID];
//        // 顯示標題和子標題
//        annotationView.canShowCallout = YES;
//    }
//    
//    // 3.傳遞模型(更新大頭針數據，覆蓋掉之前的舊數據)
//    annotationView.annotation = annotation;
//    
//    // 4.設置圖片
//    annotationView.image = [UIImage imageNamed:annotation.icon];
//    
//    return annotationView;
//}
@end

 

實例：MpaKit ->在地圖上畫線

 

#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;
@end

#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;
    
    // 起點
    MKMapItem *sourceItem = [[MKMapItem alloc] initWithPlacemark:self.sourceMKPm];
    
    // 終點
    MKMapItem *destinationItem = [[MKMapItem alloc] initWithPlacemark:self.destinationMKPm];
    
    // 存放起點和終點
    NSArray *items = @[sourceItem, destinationItem];
    
    // 參數
    NSMutableDictionary *options = [NSMutableDictionary dictionary];
    // 導航模式：駕駛導航
    options[MKLaunchOptionsDirectionsModeKey] = MKLaunchOptionsDirectionsModeDriving;
    // 是否要顯示路況
    options[MKLaunchOptionsShowsTrafficKey] = @YES;
    
    // 打開蘋果官方的導航應用
    [MKMapItem openMapsWithItems:items launchOptions:options];
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    self.mapView.delegate = self;
    
    NSString *sourceAddress = @"廣州";
    NSString *destinationAddress = @"帝都";
    
    [self.geocoder geocodeAddressString:sourceAddress completionHandler:^(NSArray *placemarks, NSError *error) {
        CLPlacemark *gzPm = [placemarks firstObject];
        if (gzPm == nil) return;
        
        // 添加廣州大頭針
        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;
            
            // 添加北京大頭針
            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.初始化方向請求
    // 方向請求
    MKDirectionsRequest *request = [[MKDirectionsRequest alloc] init];
    
    // 設置起點
    MKPlacemark *sourceMKPm = [[MKPlacemark alloc] initWithPlacemark:sourceCLPm];
    request.source = [[MKMapItem alloc] initWithPlacemark:sourceMKPm];
    self.sourceMKPm = sourceMKPm;
    
    // 設置終點
    MKPlacemark *destinationMKPm = [[MKPlacemark alloc] initWithPlacemark:destinationCLPm];
    request.destination = [[MKMapItem alloc] initWithPlacemark:destinationMKPm];
    self.destinationMKPm = destinationMKPm;
    
    // 2.根據請求創建方向
    MKDirections *directions = [[MKDirections alloc] initWithRequest:request];
    
    // 3.執行請求
    [directions calculateDirectionsWithCompletionHandler:^(MKDirectionsResponse *response, NSError *error) {
        if (error) return;
        
        for (MKRoute *route in response.routes) {
            // 添加路線遮蓋（傳遞路線的遮蓋模型數據）
            [self.mapView addOverlay:route.polyline];
        }
    }];
    
    // 遮蓋 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