相关疑难解决方法(0)

我想在地图中为我的注释添加自定义图像.我已经制作了以下自定义MapAnnotationView:

#import <UIKit/UIKit.h>
#import <Foundation/Foundation.h>
#import <MapKit/MapKit.h>
#import <CoreLocation/CoreLocation.h>
@class POI;

@interface MapAnnotation : MKAnnotationView <MKAnnotation >

@property (nonatomic) CGFloat lat; 
@property (nonatomic) CGFloat lon;
@property (nonatomic) CGFloat altitude; 
@property (nonatomic,  copy) NSString * title;
@property (nonatomic, copy) NSString * subtitle;
@property (nonatomic,retain) NSString *source;
@property (nonatomic,retain) UIImage  *image;

@end

@implementation MapAnnotation
@synthesize coordinate;
@synthesize lat=_lat,lon=_lon,altitude= _altitude;
@synthesize subtitle= _subtitle, title= _title, source=_source, image =_img;


- (CLLocationCoordinate2D)coordinate;{
    CLLocationCoordinate2D position;
    if (_lat != 0.0 && _lon != 0.0) {
        position.latitude = …