mapkit，标注一个注释索引的披露按钮

Question

我一直在为此奋斗了几天，我甚至重写了一半的代码尝试另一种方式。

我有从csv导入我的注释，并放置在贴图和字幕上，我试图徒劳地向披露按钮添加一个标签，以便我可以看到哪一个被挖掘，但有问题，无论值我分配给注解我似乎无法访问它们（如索引）我可以访问标题和副标题，但多数民众赞成它。

如何将指标分配到注释，然后我就可以添加到按钮作为标记，这样我就可以记录水龙头

这里是我的代码

 NSURL *dataUrl = [NSURL URLWithString:@"http://nne.ezadspro.co.uk/cms/testmap.txt"]; 
    // URLWithString:@"http://neic.usgs.gov/neis/gis/qed.asc"]; 
    NSString *fileString = [NSString stringWithContentsOfURL:dataUrl 
                encoding:NSUTF8StringEncoding 
                 error:nil]; 
    int count = 0; 
    NSScanner *scanner = [NSScanner scannerWithString:fileString]; 

    points = [[NSMutableArray array] retain]; 
    AnnotationData *event; 
    NSString *line; 
    NSArray *values; 
    while ([scanner isAtEnd] == NO) { 
     [scanner scanUpToString:@"\n" intoString:&line]; 
     //skip the first line 
     if(count > 0) { 
      values = [line componentsSeparatedByString:@","]; 
      event = [[[AnnotationData alloc] init] autorelease]; 
      event.latitude = [[values objectAtIndex:5] floatValue]; 
      event.longitude = [[values objectAtIndex:6] floatValue]; 
      event.companyID = [[values objectAtIndex:0]intValue]; 
      event.title = [values objectAtIndex:1]; 
      event.subtitle = [values objectAtIndex:2]; 
      //event.magnitude = [[values objectAtIndex:4] floatValue]; 
      //event.depth = [[values objectAtIndex:5] floatValue]; 
      //NSLog(@"%@",event.companyID); 
      [points addObject:event]; 

     } 
     count++; 
     if(count == 300) { 
      //limit number of events to 300 
      break; 
     } 
    } 



    for (int i=0; i<points.count; i++) { 
     AnnotationData *annData = [points objectAtIndex:i]; 


     coordinate.latitude = annData.latitude; 
     coordinate.longitude = annData.longitude; 
     CLLocationCoordinate2D newCoord = {coordinate.latitude, coordinate.longitude}; 
     PlaceAnnotation* annotation = [[PlaceAnnotation alloc] initWithCoordinate:newCoord andID:i]; 
     annotation.mTitle = annData.title; 
     annotation.mSubtitle = annData.subtitle; 
     annotation.indexID = i; 

     //annotation.indexID = [[i]intValue]; 


     [mapView addAnnotation:annotation]; 

     [annotation release]; 

    } 


} 




- (void)didReceiveMemoryWarning { 
    // Releases the view if it doesn't have a superview. 
    [super didReceiveMemoryWarning]; 

    // Release any cached data, images, etc that aren't in use. 
} 

- (void)viewDidUnload { 
    // Release any retained subviews of the main view. 
    // e.g. self.myOutlet = nil; 
} 




- (MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:(id <MKAnnotation>)annotation 
{ 
    MKPinAnnotationView *pinAnnotation = nil; 
    if(annotation != mV.userLocation) 
    { 
     static NSString *defaultPinID = @"myPin"; 
     pinAnnotation = (MKPinAnnotationView *)[mV dequeueReusableAnnotationViewWithIdentifier:defaultPinID]; 
     if (pinAnnotation == nil) 
      pinAnnotation = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:defaultPinID] autorelease]; 

     pinAnnotation.canShowCallout = YES; 

     //instatiate a detail-disclosure button and set it to appear on right side of annotation 
     UIButton *infoButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure]; 
     pinAnnotation.rightCalloutAccessoryView = infoButton; 





     //infoButton.tag = 
     //[infoButton addTarget:self action:@selector(onMapVenueSelect) forControlEvents:UIControlEventTouchUpInside]; 
     //defaultPinID.rightCalloutAccessoryView = infoButton; 
     //infoButton.tag = [event indexOfObject:tmpVenueData]; 
     // [defaultPinID release]; 

    } 

    return pinAnnotation; 
    [pinAnnotation release]; 
} 

感谢

Answer 1

考虑使用MKAnnotation协议并存储您需要的任何ID或数据。

的一个起点头可能会去是这样的：

#import <Foundation/Foundation.h> 
#import <MapKit/MapKit.h> 
#import <CoreLocation/CoreLocation.h> 


@interface YourFancyAnnotationClass : NSObject <MKAnnotation> { 
    CLLocationCoordinate2D coordinate; 
    NSString *title; 
    NSString *subtitle; 
    NSNumber *companyID; 
} 

@property(nonatomic, assign) CLLocationCoordinate2D coordinate; 
@property(nonatomic, copy) NSString *title; 
@property(nonatomic, copy) NSString *subtitle; 
@property(nonatomic, copy) NSNumber *companyID; 



@end 




Then in your delegate do something like this... 

    - (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control 
    { 
     NSLog(@"calloutAccessoryControlTapped:"); 
     YourFancyAnnotationClass *tappedSite = (SiteAnnotation *)[view annotation]; 
     NSNumber *companyIDThatWasClickedExample = [tappedSite companyID]; 

等等