获取indexPath for mapView注释

Question

我使用来自plist的数据在地图上加载了一堆针脚。这里是我得到的数据：

for (int i=0; i<self.dataArray.count; i++){ 

    NSDictionary *dataDictionary = [self.dataArray objectAtIndex:i]; 
    NSArray *array = [dataDictionary objectForKey:@"Locations"]; 

    for (int i=0; i<array.count; i++){ 

     NSMutableDictionary *dictionary = [array objectAtIndex:i]; 

     double latitude = [[dictionary objectForKey:@"Latitude"] doubleValue]; 
     double longitude = [[dictionary objectForKey:@"Longitude"] doubleValue]; 

     CLLocationCoordinate2D coord = {.latitude = 
      latitude, .longitude = longitude}; 
     MKCoordinateRegion region = {coord}; 

     MapAnnotation *annotation = [[MapAnnotation alloc] init]; 
     annotation.title = [dictionary objectForKey:@"Name"]; 

     NSString *cityState = [dictionary objectForKey:@"City"]; 
     cityState = [cityState stringByAppendingString:@", "]; 
     NSString *state = [dictionary objectForKey:@"State"]; 
     cityState = [cityState stringByAppendingString:state]; 
     annotation.subtitle = cityState; 
     annotation.coordinate = region.center; 
     [mapView addAnnotation:annotation]; 
    } 
} 

现在对每一个注释，我添加了一个detailDisclosureButton。我想从plist中显示特定位置的详细信息。问题是我需要indexPath.section和indexPath.row。

如何获得pin的indexPath？有没有办法找到填充注释标题的字典的indexPath？

Answer 1

我建议不要跟踪“部分”和“行”，而是在注释对象中存储对dictionary本身的引用。

在MapAnnotation类，添加属性来保存对源参考字典：

@property (nonatomic, retain) NSMutableDictionary *sourceDictionary; 

在创建注释（在现有的循环），设置该属性与title一起，等：

在细节按钮处理方法

annotation.sourceDictionary = dictionary; 
annotation.title = [dictionary objectForKey:@"Name"]; 

然后（假设你正在使用的calloutAccessoryControlTapped委托方法），你投注释对象类，你就可以访问原来的词典注释来自：

MapAnnotation *mapAnn = (MapAnnotation *)view.annotation; 
NSLog(@"mapAnn.sourceDictionary = %@", mapAnn.sourceDictionary);