ios自带地图笔记

// ios自带地图笔记

导入<MapKit/MapKit.h> <CoreLocation/CoreLocation.h> 两个库
引用地图前 尽量用真机测试 模拟器的话 等程序运行起来之后点击 xcode下方的 位置图片按钮标识 便可
需在info.plist中追加NSLocationWhenInUseUsageDescription或NSLocationAlwaysUsageDescription字段.其中：
NSLocationWhenInUseUsageDescription表示应用在前台的时候可以搜到更新的位置信息。
NSLocationAlwaysUsageDescription表示应用在前台和后台（suspend或terminated)都可以获取到更新的位置数据。

*/
#import "ViewController.h"
#import <MapKit/MapKit.h>
#import <CoreLocation/CoreLocation.h>

@interface ViewController ()<MKMapViewDelegate,CLLocationManagerDelegate>
{
MKMapView *_mapView;
CLLocationManager *locationManager;
CLLocation *location;
}

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
_mapView =[[MKMapView alloc]initWithFrame:self.view.bounds];
_mapView.zoomEnabled = YES;
_mapView.showsUserLocation = YES;
_mapView.scrollEnabled = YES;
_mapView.delegate = self;
[self.view addSubview:_mapView];
if([[UIDevice currentDevice].systemVersion floatValue] > 8.0f)
{
[self getUserLocation];
}
// 长按手势 长按添加大头针
UILongPressGestureRecognizer *lpgr = [[UILongPressGestureRecognizer alloc]initWithTarget:self
action:@selector(lpgrClick:)];
[_mapView addGestureRecognizer:lpgr];

}
//获取当前位置
- (void)getUserLocation
{
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
//kCLLocationAccuracyBest:设备使用电池供电时候最高的精度
locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters;
locationManager.distanceFilter = 50.0f;
if (([[[UIDevice currentDevice] systemVersion] doubleValue] >= 8.0))
{
[locationManager requestAlwaysAuthorization];
}
//更新位置
[locationManager startUpdatingLocation];
}
#pragma mark-CLLocationManagerDelegate 位置更新后的回调
-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
//停止位置更新
[locationManager stopUpdatingLocation];

CLLocation *loc = [locations firstObject];
CLLocationCoordinate2D theCoordinate;
//位置更新后的经纬度
theCoordinate.latitude = loc.coordinate.latitude;
theCoordinate.longitude = loc.coordinate.longitude;
//设定显示范围
MKCoordinateSpan theSpan;
theSpan.latitudeDelta=0.01;
theSpan.longitudeDelta=0.01;
//设置地图显示的中心及范围
MKCoordinateRegion theRegion;
theRegion.center=theCoordinate;
theRegion.span=theSpan;
[_mapView setRegion:theRegion];
location = [locations lastObject];
CLGeocoder *geocoder = [[CLGeocoder alloc] init];

[geocoder reverseGeocodeLocation:location completionHandler:^(NSArray *array,
NSError *error)
{
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
[geocoder reverseGeocodeLocation:location completionHandler:^(NSArray *array,
NSError *error) {

if (array.count > 0)
{
CLPlacemark *placemark = [array objectAtIndex:0];
// 将获得的所有信息显示到label上
NSLog(@"%@",placemark.administrativeArea);
// 获取城市
NSString *city = placemark.administrativeArea;
if (!city) {
// 四大直辖市的城市信息无法通过locality获得，只能通过获取省份的方法来获得（如果city为空，则可知为直辖市）
city = placemark.administrativeArea;
}
NSLog(@"当前城市:%@",city);
// 设置地图显示的类型及根据范围进行显示 安放大头针
MKPointAnnotation *pinAnnotation = [[MKPointAnnotation alloc] init];
pinAnnotation.coordinate = theCoordinate;
pinAnnotation.title = city;
[_mapView addAnnotation:pinAnnotation];
}
else
if (error ==
nil && [array count] == 0)
{
NSLog(@"No results were returned.");
}
else
if (error !=
nil)
{
NSLog(@"An error occurred = %@", error);
}

}];

}];
}

// 每次添加大头针都会调用此方法 可以设置大头针的样式
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation
{
// 判断大头针位置是否在原点,如果是则不加大头针
if([annotation isKindOfClass:[mapView.userLocation
class]])
return
nil;
static
NSString *annotationName = @"annotation";
MKPinAnnotationView *anView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:annotationName];
if(anView ==
nil)
{
anView = [[MKPinAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:annotationName];
}
anView.animatesDrop = YES;
// // 显示详细信息
anView.canShowCallout = YES;
// anView.leftCalloutAccessoryView 可以设置左视图
// anView.rightCalloutAccessoryView 可以设置右视图
return anView;
}

//长按添加大头针事件
- (void)lpgrClick:(UILongPressGestureRecognizer *)lpgr
{
// 判断只在长按的起始点下落大头针
if(lpgr.state ==
UIGestureRecognizerStateBegan)
{
// 首先获取点
CGPoint point = [lpgr locationInView:_mapView];
// 将一个点转化为经纬度坐标
CLLocationCoordinate2D center = [_mapView convertPoint:point toCoordinateFromView:_mapView];
MKPointAnnotation *pinAnnotation = [[MKPointAnnotation alloc] init];
pinAnnotation.coordinate = center;
pinAnnotation.title = @"长按";
[_mapView addAnnotation:pinAnnotation];
}
}

//计算两个位置之间的距离
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
NSLog(@"%@",error);
}

- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

@end