Question

我正在使用来自plist的数据在地图上加载一堆引脚。以下是我获取数据的方法：

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，对于每个注释，我都添加了detailDisclosureButton。我想从plist中显示该特定位置的详细信息。问题是我需要indexPath.section和indexPath.row。

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

Answer 1

我建议在注释对象中存储对dictionary本身的引用，而不是跟踪“section”和“row”。

在MapAnnotation类中，添加一个属性以保存对源词典的引用：

@property (nonatomic, retain) NSMutableDictionary *sourceDictionary;

创建注释（在现有循环中）时，请将此属性与title等一起设置：

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

然后在详细按钮处理程序方法中（假设您使用calloutAccessoryControlTapped委托方法），将注释对象强制转换为类，并且您将能够访问注释来自的原始字典：< / p>

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

获取mapView Annotation的indexPath

1 个答案: