我正在 iPhone 上测试 MapKit 框架,非常想将显示位置的标准图钉切换为名为“location.png”的图像。
我如何修改我的代码以允许这样做?
主控
- (void)viewDidLoad
{
[super viewDidLoad];
//
// Set the map center
//
CLLocationCoordinate2D coordinate;
coordinate.latitude = 49.2802;
coordinate.longitude = -123.1182;
mapView.region = MKCoordinateRegionMakeWithDistance(coordinate, 2000, 2000);
//
// Set 10 random locations on the map for testing purposes
//
for(int i = 0; i < 10; i++)
{
CGFloat latDelta = rand()*.035/RAND_MAX -.02;
CGFloat longDelta = rand()*.03/RAND_MAX -.015;
CLLocationCoordinate2D newCoord = { coordinate.latitude + latDelta, coordinate.longitude + longDelta };
MapAnnotation* annotation = [[MapAnnotation alloc] initWithCoordinate:newCoord];
[mapView addAnnotation:annotation];
[annotation release];
}
[mapView setDelegate:self];
}
MapAnnotation.h
#import <Foundation/Foundation.h>
#import <MapKit/MapKit.h>
@interface MapAnnotation : NSObject <MKAnnotation> {
CLLocationCoordinate2D _coordinate;
}
- (id)initWithCoordinate:(CLLocationCoordinate2D)coordinate;
@end
MapAnnotation.m
#import "MapAnnotation.h"
@implementation MapAnnotation
@synthesize coordinate = _coordinate;
- (id)initWithCoordinate:(CLLocationCoordinate2D)coordinate
{
self = [super init];
if (self != nil)
{
_coordinate = coordinate;
}
return self;
}
@end
谢谢!
最佳答案
我在查看 MapCallouts 的源代码后解决了这个问题
这是我的解决方案:
- (MKAnnotationView *)mapView:(MKMapView *)map viewForAnnotation:(id <MKAnnotation>)annotation
{
static NSString *AnnotationViewID = @"annotationViewID";
MKAnnotationView *annotationView = (MKAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationViewID];
if (annotationView == nil)
{
annotationView = [[[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationViewID] autorelease];
}
annotationView.image = [UIImage imageNamed:@"location.png"];
annotationView.annotation = annotation;
return annotationView;
}
关于objective-c - 如何将自定义图钉添加到 iPhone MapKit?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/2699171/