ios菜鸟之路：iphone google map 定位的实现

一、导入MapAnnotations类。

在工程的build phases中的link binary with libraryies中点击+号添加MapAnnotations类。

二、头文件中加载类以及协议

#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>
#import <MapKit/MapKit.h>
#import "MapAnnotations.h"
@interface panyongViewController : UIViewController<CLLocationManagerDelegate,MKMapViewDelegate>
- (IBAction)getphoto:(id)sender;
@property (nonatomic,strong)IBOutlet MKMapView *map;
@property (strong, nonatomic) IBOutlet UISegmentedControl *segmentControl;
@property (nonatomic,strong)IBOutlet CLLocationManager *locManager;
@property(nonatomic) CLLocationCoordinate2D loc;
  @property(nonatomic,strong) IBOutlet  MapAnnotations *mapAnnotations;
-(void)setCurrentLocation:(CLLocation *)location;
- (IBAction)segmentChange:(id)sender;
@end

三、定位具体实现

//在viewdidload中添加map及locmanager的初始化

 map=[[MKMapView alloc]initWithFrame:CGRectMake(0.0f, 0.0f, 320.0f, 410.0f)];
    map.showsUserLocation=YES;
    [self.view addSubview:map];
    locManager=[[CLLocationManager alloc]init];
    locManager.delegate=self;
    locManager.desiredAccuracy=kCLLocationAccuracyBest;
    locManager.distanceFilter=10.0f;
    [locManager startUpdatingHeading];

    mapAnnotations=[[MapAnnotations alloc]initWithCoordinate:loc];
    mapAnnotations.title=@"test";
    mapAnnotations.subtitle=@"have a try";
    [map addAnnotation:mapAnnotations];

//三种地图格式的转换

- (IBAction)segmentChange:(id)sender {
    
    if (segmentControl.selectedSegmentIndex==0) {
        map.mapType=MKMapTypeStandard;
    }
    if (segmentControl.selectedSegmentIndex==1) {
        map.mapType=MKMapTypeHybrid;
    }
    if (segmentControl.selectedSegmentIndex==2) {
        map.mapType=MKMapTypeSatellite;
    }
}
#pragma mark-
#pragma mark Core Location Delegate Methods

//地图定位的实现
-(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation{
    loc=[newLocation coordinate];
    MKCoordinateRegion region;
    MKCoordinateSpan span;
    
    span.latitudeDelta=0.1;
    span.longitudeDelta=0.1;
    region.span=span;
    region.center=loc;
    map.mapType=MKMapTypeStandard;
    [map setRegion:region animated:YES];
    [map regionThatFits:region];
    UILabel *label1=[[UILabel alloc]initWithFrame:CGRectMake(0, 0, 10, 10)];
    UILabel *label2=[[UILabel alloc]initWithFrame:CGRectMake(0, 15, 10, 10)];
    label1.text=[[NSString alloc]initWithFormat:@"%f",span.latitudeDelta];
    label2.text=[[NSString alloc]initWithFormat:@"%f",span.longitudeDelta];
    [map addSubview: label1];
        [map addSubview: label2];
}

//用户拒绝使用地图服务
-(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
    NSString *errorMessage;
    if ([error code]==kCLErrorDenied) {
        errorMessage=@"被拒绝访问";
    }
    if ([error code]==kCLErrorLocationUnknown) {
        errorMessage=@"";
        UIAlertView *alert=[[UIAlertView alloc]initWithTitle:nil message:errorMessage delegate:self cancelButtonTitle:@"返回" otherButtonTitles:nil, nil];
        [alert show];
    }
}

//更新用户定位地址
-(void)setCurrentLocation:(CLLocation *)location{
    MKCoordinateRegion region;
    region.center=location.coordinate;
    region.span.longitudeDelta=0.15f;
    region.span.latitudeDelta=0.15f;
    [map setRegion:region animated:YES];
}