iphone - 在实现 MKAnnotation 时如何获取 pin 的标题和副标题？

Question

我已经实现了 MKAnnotation，如下所示。我会放置很多引脚，每个引脚的信息都存储在一个数组中。该数组的每个成员都是一个对象，其属性将给出图钉的标题和副标题的值。每个对象对应一个引脚。但是，当我单击一个引脚时，如何显示这些引脚的值？

@interface UserAnnotation : NSObject <MKAnnotation>
{
CLLocationCoordinate2D coordinate;

NSString *title;
NSString *subtitle;
NSString *city;
NSString *province;
}

@property (nonatomic, assign) CLLocationCoordinate2D coordinate;
@property (nonatomic, retain) NSString *title;
@property (nonatomic, retain) NSString *subtitle;
@property (nonatomic, retain) NSString *city;
@property (nonatomic, retain) NSString *province;

-(id)initWithCoordinate:(CLLocationCoordinate2D)c;

.m 是

@implementation UserAnnotation

@synthesize coordinate, title, subtitle, city, province;

- (NSString *)title
{
 return title;
}

- (NSString *)subtitle
{
 return subtitle;
}

- (NSString *)city
{
 return city;
}

- (NSString *)province
{
 return province;
}

-(id)initWithCoordinate:(CLLocationCoordinate2D)c
{
coordinate=c;
NSLog(@"%f,%f",c.latitude,c.longitude);
return self;
}


@end

Answer 1

只添加了两行，一切都完成了。

annView.canShowCallout = YES;
annView.calloutOffset = CGPointMake(-5, 5);