UI：地图和定位

参考学习链接

各种IOS设备可以使用　Core　Location　框架确定它的物理位置。core　location　主要使用三种技术来实现功能。GPS、蜂窝基站三角网络定位、 wifi 定位服务。这三种技术都会非常的消耗电能，所以在使用Core Location 的时候，要注意，除非必要，要尽量少对你的位置进行轮询。使用 core location 的时候，通过指定所需的最低精度级别，可以减少不必要的电能损耗。

获取定位

 

if ([CLLocationManagerlocationServicesEnabled]) {

        [CLLocationManager authorizationStatus];
        self.locationManager = [[CLLocationManager alloc] init];
        [self.locationManager startUpdatingLocation];
        [self.locationManager requestWhenInUseAuthorization];

    }

 

 

 

// 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;

 

 

 

// 设置经纬度
    CLLocationCoordinate2D ddd = CLLocationCoordinate2DMake(23, 116);
//
//    [self.mapView setCenterCoordinate:ddd];
   
   
    // 设置跨度

    [self.mapView setRegion:MKCoordinateRegionMake(ddd, MKCoordinateSpanMake(1, 1)) animated:YES];

 

 

归位

- (IBAction)guiweiAction:(id)sender {
    [self.mapView setUserTrackingMode:MKUserTrackingModeFollow animated:YES];

}

 

 

 

代理方法  显示系统自带的大头针

- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
    userLocation.title = @"天朝帝都";
    userLocation.subtitle = @"帝都是个牛逼的地方";

}

 

 

 

自定义大头针类

#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

 

// 创建两个大头针
    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];

 

 

创建100个大头针

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];

    }

 

 

 

大图片的大头针

// 带图片的大头针
    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];

 

 

设置带图片的大头针

//- (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;

//}

 

 

 

导航  

 

@property (nonatomic, strong) CLGeocoder *geocoder;
- (IBAction)startNavigation;

@property (nonatomic, strong) MKPlacemark *sourceMKPm;

@property (nonatomic, strong) MKPlacemark *destinationMKPm; 

 

先划线

- (void)viewDidLoad
{
    [super viewDidLoad];
   
    self.mapView.delegate = self;
   
    NSString *sourceAddress = @"广州";
    NSString *destinationAddress = @"北京";
   
    [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;

}

 

 

 

开始导航

- (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];

}