一、MKMapView的基本使用
#import <MapKit/MapKit.h>
@interface ViewController (){
CLLocationManager *manger ;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
MKMapView *mapview =[[MKMapView alloc]init];
mapview.frame = self.view.bounds;
mapview.mapType = MKMapTypeStandard;
mapview.showsCompass = YES; // 是否显示指南针
mapview.showsScale = YES; // 是否显示比例尺
mapview.showsTraffic = YES; // 是否显示交通
mapview.showsBuildings = YES; // 是否显示建筑物
[self.view addSubview:mapview];
}
@end
二、在地图上显示用户的位置
显示用户的位置，就会涉及到定位。如果要显示用户位置就需要主动请求用户授权，自然你需要先去infoplist文件中配置定位的权限。
1、方式一
#import "ViewController.h"
#import <MapKit/MapKit.h>
@interface ViewController (){
CLLocationManager *Locatonmanger;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
MKMapView *mapview =[[MKMapView alloc]init];
mapview.frame = self.view.bounds;
[self.view addSubview:mapview];
//1、主动请求位置授权方式
Locatonmanger = [[CLLocationManager alloc]init];
[Locatonmanger requestAlwaysAuthorization];
//2、在地图上显示w用户位置
mapview.showsUserLocation = YES;
}
@end
效果：会在地图上显示一个蓝点, 标识用户所在位置; 但地图不会缩放, 而且当用户位置移动时, 地图不会跟随用户位置移动而移动
2、方式二
#import "ViewController.h"
#import <MapKit/MapKit.h>
@interface ViewController (){
CLLocationManager *Locatonmanger;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
MKMapView *mapview =[[MKMapView alloc]init];
mapview.frame = self.view.bounds;
[self.view addSubview:mapview];
//1、主动请求位置授权方式
Locatonmanger = [[CLLocationManager alloc]init];
[Locatonmanger requestAlwaysAuthorization];
//2、设置用户追踪模式
mapview.userTrackingMode= MKUserTrackingModeFollow;
}
@end
效果: 会在地图上显示一个蓝点, 标识用户所在位置; 而且地图缩放到合适比例,显示用户位置, 当用户位置移动时, 地图会跟随用户位置移动而移动; 但是有时候失效;
三、获取位置信息
#import "ViewController.h"
#import <MapKit/MapKit.h>
@interface ViewController ()<MKMapViewDelegate>{
CLLocationManager *Locatonmanger;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
MKMapView *mapview =[[MKMapView alloc]init];
mapview.delegate = self;
mapview.frame = self.view.bounds;
[self.view addSubview:mapview];
//1、主动请求位置授权方式
Locatonmanger = [[CLLocationManager alloc]init];
[Locatonmanger requestAlwaysAuthorization];
//2、设置用户追踪模式
mapview.userTrackingMode= MKUserTrackingModeFollow;
}
#pragma mark - 获取用户位置信息
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation{
CGFloat longtitude = userLocation.coordinate.longitude;
CGFloat latitud = userLocation.coordinate.latitude;
CLGeocoder *gecoder = [[CLGeocoder alloc]init];
CLLocation *location = [[CLLocation alloc]initWithLatitude:latitud longitude:longtitude];
[gecoder reverseGeocodeLocation:location completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {
CLPlacemark *placemark=[placemarks firstObject];
NSDictionary *dic = placemark.addressDictionary;
NSLog(@"详细信息:%@",dic);
}];
}
@end
MKUserLocation为大头针数据模型，只要遵守了MKAnnotation协议就可以作为大头针数据模型。
四、大头针的使用
在地图上操作大头针,实际上是控制大头针数据模型： 添加大头针就是添加大头针数据模型； 删除大头针就是删除大头针数据模型。
1、在地图上添加大头针视图
- (void)addAnnotation:(id <MKAnnotation>)annotation;
2、在地图上 删除大头针视图
- (void)removeAnnotation:(id <MKAnnotation>)annotation;
- (void)removeAnnotations:(NSArray<id<MKAnnotation>> *)annotations;
- 4.1 、创建一个 大头针数据模型
系统提供的MKUserLocation类就是一个大头针数据模型
#import <MapKit/MKFoundation.h>
#import <MapKit/MKAnnotation.h>
@class CLLocation;
@class MKUserLocationInternal;
@interface MKUserLocation : NSObject <MKAnnotation>
// Returns YES if the user's location is being updated.
@property (readonly, nonatomic, getter=isUpdating) BOOL updating;
// Returns nil if the owning MKMapView's showsUserLocation is NO or the user's location has yet to be determined.
@property (readonly, nonatomic, nullable) CLLocation *location;
// Returns nil if not in MKUserTrackingModeFollowWithHeading
@property (readonly, nonatomic, nullable) CLHeading *heading NS_AVAILABLE(10_9, 5_0) __TVOS_PROHIBITED;
// The title to be displayed for the user location annotation.
@property (nonatomic, copy, nullable) NSString *title;
// The subtitle to be displayed for the user location annotation.
@property (nonatomic, copy, nullable) NSString *subtitle;
@end
然而location这里是readonly,这样我们就无法愉快地创建。
因此需要新建一个自定义的大头针数据模型。
#import <Foundation/Foundation.h>
#import <MapKit/MKAnnotation.h>
@interface MyMKUserLocation : NSObject <MKAnnotation>
@property (nonatomic, assign) CLLocationCoordinate2D coordinate;//插在地图上的位置
@property (nonatomic, copy, nullable) NSString *title;
@property (nonatomic, copy, nullable) NSString *subtitle;
@end
#import "MyMKUserLocation.h"
@implementation MyMKUserLocation
@end
//鼠标点击在地图哪个位置, 就在对应的位置添加一个大头针, 并在标注弹框中显示对应的城市和街道;
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
//1. 获取触摸点在地图上对应的坐标
UITouch *touch = [touches anyObject];
CGPoint touchPoint = [touch locationInView:self.mapview];
//2. 将坐标转换成为经纬度
CLLocationCoordinate2D coordinate = [self.mapview convertPoint:touchPoint toCoordinateFromView:self.mapview];
//3. 根据经纬度创建大头针数据模型, 并添加在地图上
MyMKUserLocation *myLocation = [[MyMKUserLocation alloc] init];
myLocation.coordinate = coordinate;
myLocation.title = @"中国";
myLocation.subtitle = @"你好";
[self.mapview addAnnotation:myLocation];
}
- 4.2 、自定义大头针视图
- 如果想要自定义大头针, 必须使用 MKAnnotationView 或者 自定义的子类
- 但是不能直接使用系统默认的大头针, 会无效
#import "ViewController.h"
#import <MapKit/MapKit.h>
#import "MyMKUserLocation.h"
@interface ViewController ()<MKMapViewDelegate>{
CLLocationManager *Locatonmanger;
MKUserLocation *_userLocation;
}
@property(nonatomic,strong)MKMapView *mapview;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
MKMapView *mapview =[[MKMapView alloc]init];
mapview.delegate = self;
mapview.frame = self.view.bounds;
[self.view addSubview:mapview];
//1、主动请求位置授权方式
Locatonmanger = [[CLLocationManager alloc]init];
[Locatonmanger requestAlwaysAuthorization];
//2、设置用户追踪模式
mapview.userTrackingMode = MKUserTrackingModeFollow;
self.mapview = mapview;
}
/**
如果方法没有实现，或者返回的是nil,那么系统就会使用默认 的大头针视图，显示到地图上
@param mapView 地图
@param annotation 大头针数据模型
@return 大头针视图 MKAnnotationView系统大头针视图对应的类
*/
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation{
//大头针，也是有“循环利用机制”
static NSString *ide = @"Mk";
MKAnnotationView *annotationView = [mapView dequeueReusableAnnotationViewWithIdentifier:ide];
if (annotationView == nil) {
annotationView = [[MKAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:ide];
}
annotationView.annotation = annotation;
// 设置大头针图片
annotationView.image = [UIImage imageNamed:@"category_3"];
// 设置大头针可以弹出标注
annotationView.canShowCallout = YES;
// 设置标注左侧视图
UIImageView *leftIV = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];
leftIV.image = [UIImage imageNamed:@"huba.jpeg"];
annotationView.leftCalloutAccessoryView = leftIV;
// 设置标注右侧视图
UIImageView *rightIV = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];
rightIV.image = [UIImage imageNamed:@"eason.jpg"];
annotationView.rightCalloutAccessoryView = rightIV;
// 设置标注详情视图（iOS9.0）
annotationView.detailCalloutAccessoryView = [[UISwitch alloc] init];
return annotationView;
}
@end
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