尝试这个:
CLLocationCoordinate2D coord;
coord.latitude = 45.733333;
coord.longitude = 9.133333;
MKAnnotation *ann = [[MKAnnotation alloc] initWithLocation:coord];
[ann setTitle:@"Title"];
[ann setSubtitle:@"Subtitle"];
[map addAnnotation:ann];
不要忘记将变量更改为变量的名称。
编辑
解决方案:
创建一个类 AddressAnnotation 并粘贴此代码:
地址注解.h
#import <Foundation/Foundation.h>
#import <MapKit/MapKit.h>
@interface AddressAnnotation : NSObject <MKAnnotation> {
CLLocationCoordinate2D _coordinate;
NSString *_title;
}
@property (nonatomic, retain) NSString *title;
-(id)initWithCoordinate:(CLLocationCoordinate2D)c;
@end
地址注释.m
#import "AddressAnnotation.h"
@implementation AddressAnnotation
- (NSString *)subtitle{
return nil;
}
- (NSString *)title{
return _title;
}
- (CLLocationCoordinate2D)coordinate{
return _coordinate;
}
-(id)initWithCoordinate:(CLLocationCoordinate2D)c{
_coordinate = c;
return self;
}
@end
现在,这是一个处理地图并创建注释的类:
MapViewController.h
#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
@interface MapViewController : UIViewController
@property (nonatomic, retain) IBOutlet MKMapView *mapView;
- (IBAction)changeMapType:(UISegmentedControl *)control;
@end
MapViewController.m
#import "MapViewController.h"
#import "AddressAnnotation.h"
@interface MapViewController ()
@end
@implementation MapViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
CLLocationCoordinate2D location;
location.latitude = -15.830731; // change to your coordinate latitude
location.longitude = -47.8753; // change to your coordinate longitude
AddressAnnotation *addAnnotation = [[AddressAnnotation alloc] initWithCoordinate:location];
addAnnotation.title = [NSString stringWithFormat:@"Title for you annotation"];
MKCoordinateRegion region;
MKCoordinateSpan span;
span.latitudeDelta = 0.002; // 0.0 is min value u van provide for zooming
span.longitudeDelta= 0.002;
region.span=span;
region.center =location; // to locate to the center
[_mapView addAnnotation:addAnnotation];
[_mapView setRegion:region animated:TRUE];
[_mapView regionThatFits:region];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end