我静态地显示了一个引脚注释,但我想动态地在地图上显示标题和副标题的许多引脚。
提前谢谢。答案 0 :(得分:2)
我有一个字典数组有两个对象lat,很长,我正在这样做 -
if ([resultArray count])
{
for (int i =0; i < [resultArray count]; i++)
{
NSDictionary *dict = [resultArray objectAtIndex:i];
MKCoordinateRegion region = { {0.0, 0.0 }, { 0.0, 0.0 } };
region.center.latitude = [[dict objectForKey:@"lat"] floatValue];
region.center.longitude = [[dict objectForKey:@"long"] floatValue];
region.span.longitudeDelta = 70.0f;
region.span.latitudeDelta = 70.0f;
MyAnnotations *ann = [[MyAnnotations alloc] init];
ann.title = @"title";
ann.coordinate = region.center;
[mapView addAnnotation:ann];
}
}
//
// MyAnnotation.h
//
#import <Foundation/Foundation.h>
#import <MapKit/MapKit.h>
@interface MyAnnotation : NSObject <MKAnnotation> {
CLLocationCoordinate2D coordinate;
NSString *title;
NSString *subtitle;
}
@property (nonatomic, assign) CLLocationCoordinate2D coordinate;
@property (nonatomic, copy) NSString *title;
@property (nonatomic, copy) NSString *subtitle;
@end
//
// MyAnnotation.m
//
#import "MyAnnotation.h"
@implementation MyAnnotation
@synthesize coordinate,title,subtitle;
-(void)dealloc
{
[title release];
[subtitle release];
[super dealloc];
}
@end
将此委托用于标注 -
- (MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:(id )annotation
{
MKPinAnnotationView *pinView = nil;
static NSString *defaultPinID = @"com.invasivecode.pin";
pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID];
if ( pinView == nil )
pinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:defaultPinID] autorelease];
pinView.pinColor = MKPinAnnotationColorPurple;
pinView.canShowCallout = YES;
pinView.animatesDrop = YES;
UIButton *infoButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
[infoButton addTarget:self action:@selector(infoButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
pinView.rightCalloutAccessoryView = infoButton;
[defaultPinID release];
return pinView;
}