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#import "DDAnnotation.h"<\/span><\/div> <\/div>@interface<\/span> DDAnnotation<\/span> ()<\/span><\/div>@property<\/span> (<\/span>nonatomic<\/span>,<\/span> retain<\/span>)<\/span> NSString<\/span> *<\/span>title<\/span>;<\/span><\/div>@property<\/span> (<\/span>nonatomic<\/span>,<\/span> retain<\/span>)<\/span> MKPlacemark<\/span> *<\/span>placemark<\/span>;<\/span><\/div>-<\/span> (<\/span>void<\/span>)<\/span>notifyCalloutInfo:<\/span>(<\/span>MKPlacemark<\/span> *<\/span>)<\/span>placemark<\/span>;<\/span><\/div>@end<\/span><\/div> <\/div> <\/div>#pragma mark -<\/span><\/div>#pragma mark DDAnnotation implementation<\/span><\/div> <\/div>@implementation<\/span> DDAnnotation<\/span><\/div> <\/div>@synthesize<\/span> coordinate<\/span> =<\/span> _coordinate<\/span>;<\/span> // property declared in MKAnnotation.h<\/span><\/div>@synthesize<\/span> title<\/span> =<\/span> _title<\/span>;<\/span><\/div>@synthesize<\/span> placemark<\/span> =<\/span> _placemark<\/span>;<\/span><\/div> <\/div>-<\/span> (<\/span>id<\/span>)<\/span>initWithCoordinate:<\/span>(<\/span>CLLocationCoordinate2D<\/span>)<\/span>coordinate<\/span> title:<\/span>(<\/span>NSString<\/span>*<\/span>)<\/span>title<\/span> {<\/span><\/div>    if<\/span> ((<\/span>self<\/span> =<\/span> [<\/span>super<\/span> init<\/span>]))<\/span> {<\/span><\/div>        [<\/span>self<\/span> changeCoordinate:<\/span>coordinate<\/span>];<\/span><\/div>        _title<\/span> =<\/span> [<\/span>title<\/span> retain<\/span>];<\/span><\/div>        _placemark<\/span> =<\/span> nil<\/span>;<\/span><\/div>    }<\/span><\/div>    return<\/span> self<\/span>;<\/span><\/div>}<\/span><\/div> <\/div>#pragma mark -<\/span><\/div>#pragma mark MKAnnotation Methods<\/span><\/div> <\/div>-<\/span> (<\/span>NSString<\/span> *<\/span>)<\/span>title<\/span> {<\/span><\/div>    return<\/span> _title<\/span>;<\/span><\/div>}<\/span><\/div> <\/div>-<\/span> (<\/span>NSString<\/span> *<\/span>)<\/span>subtitle<\/span> {<\/span><\/div>    if<\/span> (<\/span>_placemark<\/span>)<\/span> {<\/span><\/div>        return<\/span> [[<\/span>_placemark<\/span>.<\/span>addressDictionary<\/span> valueForKey:<\/span>@"FormattedAddressLines"<\/span>]<\/span> componentsJoinedByString:<\/span>@", "<\/span>];<\/span><\/div>    }<\/span> <\/div> <\/div>    return<\/span> [<\/span>NSString<\/span> stringWithFormat:<\/span>@"%lf, %lf"<\/span>,<\/span> _coordinate<\/span>.<\/span>latitude<\/span>,<\/span> _coordinate<\/span>.<\/span>longitude<\/span>];<\/span><\/div>}<\/span><\/div> <\/div>#pragma mark -<\/span><\/div>#pragma mark Change coordinate<\/span><\/div> <\/div>-<\/span> (<\/span>void<\/span>)<\/span>changeCoordinate:<\/span>(<\/span>CLLocationCoordinate2D<\/span>)<\/span>coordinate<\/span> {<\/span><\/div>    _coordinate<\/span> =<\/span> coordinate<\/span>;<\/span><\/div> <\/div>    // Try to reverse geocode here<\/span><\/div>    // Note: LLVM/Clang Static analyzer might report potentical leak, but it won't because we release in delegate methods <\/span><\/div>    MKReverseGeocoder<\/span> *<\/span>reverseGeocoder<\/span> =<\/span> [[<\/span>MKReverseGeocoder<\/span> alloc<\/span>]<\/span> initWithCoordinate:<\/span>_coordinate<\/span>];<\/span><\/div>    reverseGeocoder<\/span>.<\/span>delegate<\/span> =<\/span> self<\/span>;<\/span><\/div>    [<\/span>reverseGeocoder<\/span> start<\/span>];<\/span><\/div>}<\/span><\/div> <\/div>#pragma mark -<\/span><\/div>#pragma mark MKReverseGeocoderDelegate methods<\/span><\/div> <\/div>-<\/span> (<\/span>void<\/span>)<\/span>reverseGeocoder:<\/span>(<\/span>MKReverseGeocoder<\/span> *<\/span>)<\/span>geocoder<\/span> didFindPlacemark:<\/span>(<\/span>MKPlacemark<\/span> *<\/span>)<\/span>newPlacemark<\/span> {<\/span><\/div>    [<\/span>self<\/span> notifyCalloutInfo:<\/span>newPlacemark<\/span>];<\/span><\/div>    geocoder<\/span>.<\/span>delegate<\/span> =<\/span> nil<\/span>;<\/span><\/div>    [<\/span>geocoder<\/span> release<\/span>];<\/span><\/div>}<\/span><\/div> <\/div>-<\/span> (<\/span>void<\/span>)<\/span>reverseGeocoder:<\/span>(<\/span>MKReverseGeocoder<\/span> *<\/span>)<\/span>geocoder<\/span> didFailWithError:<\/span>(<\/span>NSError<\/span> *<\/span>)<\/span>error<\/span> {<\/span><\/div>    [<\/span>self<\/span> notifyCalloutInfo:<\/span>nil<\/span>];<\/span><\/div>    geocoder<\/span>.<\/span>delegate<\/span> =<\/span> nil<\/span>;<\/span><\/div>    [<\/span>geocoder<\/span> release<\/span>];<\/span><\/div>}<\/span><\/div> <\/div>#pragma mark -<\/span><\/div>#pragma mark MKAnnotationView Notification<\/span><\/div> <\/div>-<\/span> (<\/span>void<\/span>)<\/span>notifyCalloutInfo:<\/span>(<\/span>MKPlacemark<\/span> *<\/span>)<\/span>newPlacemark<\/span> {<\/span><\/div>    [<\/span>self<\/span> willChangeValueForKey:<\/span>@"subtitle"<\/span>];<\/span> // Workaround for SDK 3.0, otherwise callout info won't update.<\/span><\/div>    self<\/span>.<\/span>placemark<\/span> =<\/span> newPlacemark<\/span>;<\/span><\/div>    [<\/span>self<\/span> didChangeValueForKey:<\/span>@"subtitle"<\/span>];<\/span> // Workaround for SDK 3.0, otherwise callout info won't update.<\/span><\/div> <\/div>    [[<\/span>NSNotificationCenter<\/span> defaultCenter<\/span>]<\/span> postNotification:<\/span>[<\/span>NSNotification<\/span> notificationWithName:<\/span>@"MKAnnotationCalloutInfoDidChangeNotification"<\/span> object:<\/span>self<\/span>]];<\/span><\/div>}<\/span><\/div> <\/div>#pragma mark -<\/span><\/div>#pragma mark Memory Management<\/span><\/div> <\/div>-<\/span> (<\/span>void<\/span>)<\/span>dealloc<\/span> {<\/span><\/div>    [<\/span>_title<\/span> release<\/span>],<\/span> _title<\/span> =<\/span> nil<\/span>;<\/span><\/div>    [<\/span>_placemark<\/span> release<\/span>],<\/span> _placemark<\/span> =<\/span> nil<\/span>;<\/span><\/div>    [<\/span>super<\/span> dealloc<\/span>];<\/span><\/div>}<\/span><\/div> <\/div>@end<\/span><\/div><\/pre><\/div>\n          \n        <\/div>\n\n        \n          view raw<\/a>\n          DDAnnotation.m<\/a>\n          This Gist<\/a> brought to you by GitHub<\/a>.\n        <\/div>\n      <\/div>\n    \n  \n<\/div>\n')