import <mapkit/mapkit.h>

new MKMapView *_mapview

xib mapview -> mapview

2.定位

获取地理位置

if([CLLocationManager locationServicesEnabled]){
//定位功能开启的情况下进行定位
_manager = [[CLLocationManager alloc] init];
_manager.distanceFilter = kCLDistanceFilterNone;//距离筛选器，单位米（移动多少米才回调更新）
_manager.desiredAccuracy = kCLLocationAccuracyBest; //精确度
[_manager setDelegate:self];
[_manager startUpdatingLocation];
}

pragma mark – CLLocationManagerDelegate

//成功回调

(void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation
//失败回调
(void)locationManager:(CLLocationManager *)manager
didFailWithError:(NSError *)error
注意：

主线程调用

多次校准更精确

2）定位地理位置

CLLocationCoordinate2D location=CLLocationCoordinate2DMake(_latitude, _longitude);

MKCoordinateRegion region=MKCoordinateRegionMakeWithDistance(location, DEFAULTSPAN ,DEFAULTSPAN );
MKCoordinateRegion adjustedRegion = [_mapView regionThatFits:region];
[_mapView setRegion:adjustedRegion animated:YES];
3）获得附近的信息

(void)fetchNearbyInfo
{
CLLocationDegrees latitude=116.13554;
CLLocationDegrees longitude=38.413546;
CLLocationCoordinate2D location=CLLocationCoordinate2DMake(latitude, longitude);

MKCoordinateRegion region=MKCoordinateRegionMakeWithDistance(location, DEFAULTSPAN ,DEFAULTSPAN );

MKLocalSearchRequest *requst = [[MKLocalSearchRequest alloc] init];
requst.region = region;
requst.naturalLanguageQuery = @"place"; //想要的信息
MKLocalSearch *localSearch = [[MKLocalSearch alloc] initWithRequest:requst];

[localSearch startWithCompletionHandler:^(MKLocalSearchResponse *response, NSError *error){
if (!error)
{
[_nearbyInfoArray addObjectsFromArray:response.mapItems];
//
}
else
{
//
}
}];
1. naturalLanguageQuery 大家可以看到
requst.naturalLanguageQuery = @"place"; //想要的信息
这一句很重要，因为他要是一个NSString类型的字符串，但是往往不知道应该赋值什么，其实我试过了，只要是你能想到的英语单词（地面）几乎都能显示出来，如：

医院：hospital

旅馆：hotel

小区：village

学校：school

这些都可以获得你想要的信息，当然你如果想要全部类型的可以使用place（我试了很多，发现这个最合适）

2.苹果提供的这个接口，一次只会返回固定的10个数组，如果你有需求要获得多个的话，建议使用不同naturalLanguageQuery获得多次请求后将其拼组在一起（有什么好的办法，也求大神们评论告诉我）

3.除了苹果地图提供这个接口外还有其他的地图也能获得，可以使用http协议获得，如：

google接口：

https://maps.googleapis.com/maps/api/place/nearbysearch/json?location=%f,%f&language=en&radius=1000&sensor=false&key=%@

百度接口：

http://api.map.baidu.com/place/v2/search?&query=%@&location=%f,%f&radius=2000&output=json&ak=%@

具体使用方法，请参考官方文档，这里我就不介绍了。

3.打点

1.基本点

void)addAnnotation:(id <MKAnnotation>)annotation;
- (void)addAnnotations:(NSArray *)annotations;
@protocol MKAnnotation <NSObject>

// Center latitude and longitude of the annotion view.
// The implementation of this property must be KVO compliant.
@property (nonatomic, readonly) CLLocationCoordinate2D coordinate;

@optional

// Title and subtitle for use by selection UI.
@property (nonatomic, readonly, copy) NSString *title;
@property (nonatomic, readonly, copy) NSString *subtitle;

// Called as a result of dragging an annotation view.
- (void)setCoordinate:(CLLocationCoordinate2D)newCoordinate NS_AVAILABLE(10_9, 4_0);

@end

头文件定义
@interface CalloutMapAnnotation : NSObject <MKAnnotation>

@property (nonatomic) CLLocationDegrees latitude;
@property (nonatomic) CLLocationDegrees longitude;
@property(nonatomic, copy) NSString *title;
@property(nonatomic, copy) NSString *subtitle;

@end
2.冒泡

(void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view {
    if ([view.annotation isKindOfClass:[REVClusterPin class]]) {
        if (_calloutAnnotation && _calloutAnnotation.coordinate.latitude == view.annotation.coordinate.latitude&&
            _calloutAnnotation.coordinate.longitude == view.annotation.coordinate.longitude) {
            return;
        }
        if (_calloutAnnotation) {
            [mapView removeAnnotation:_calloutAnnotation];
            _calloutAnnotation = nil;
        }
        _calloutAnnotation = [[CalloutMapAnnotation alloc]
                              initWithLatitude:view.annotation.coordinate.latitude
                              andLongitude:view.annotation.coordinate.longitude];

        _calloutAnnotation.title = view.annotation.title;
        [mapView addAnnotation:_calloutAnnotation];
    }}

- (void)mapView:(MKMapView *)mapView didDeselectAnnotationView:(MKAnnotationView *)view {
    if (_calloutAnnotation && ![view isKindOfClass:[CallOutAnnotationView class]] && !_isShowLevelMood) {
        if (_calloutAnnotation.coordinate.latitude == view.annotation.coordinate.latitude&&
            _calloutAnnotation.coordinate.longitude == view.annotation.coordinate.longitude) {

            CalloutMapAnnotation *oldAnnotation = _calloutAnnotation;
            _calloutAnnotation = nil;
            dispatch_async(dispatch_get_main_queue(), ^{
                [mapView removeAnnotation:oldAnnotation];
            });
        }
    }
}

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

    if ([annotation isKindOfClass:[CalloutMapAnnotation class]]) {

        CallOutAnnotationView *annotationView = (CallOutAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:@"CalloutView"];
        if (!annotationView) {
            annotationView = [[CallOutAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"CalloutView"];
            JingDianMapCell  *cell = [[[NSBundle mainBundle] loadNibNamed:@"JingDianMapCell" owner:self options:nil] objectAtIndex:0];
            [annotationView.contentView addSubview:cell];
            
        }
    }
}
注：轮播冒泡只需要遍历点逐个select就行

4.聚合

聚合使用了第三方库REVClusterMap，原理：

在- (void) mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated中，进行计算：

排除屏幕外的点

画出4*4的宫格块

遍历所有点，将点add到某个宫格的数组中

给出每个宫格中点的平均位置