xcode：打印MKMapView区域，span，latitudeDelta，longitudeDelta

Question

我正在尝试NSLogM区域，span，latitudeDelta，MKMapView的longitudeDelta。但是它发送了像

这样的消息

Program received signal:  “EXC_BAD_ACCESS”.

我的代码是这样的：

@interface TaetPaViewController : UIViewController <MKMapViewDelegate, CLLocationManagerDelegate, NSXMLParserDelegate> {
    IBOutlet MKMapView *regionsMapView;
}

@property (nonatomic, retain) IBOutlet MKMapView *regionsMapView;

@synthesize regionsMapView;

- (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated{
    NSLog(@"regionsMapView.region.span.latitudeDelta: %@", regionsMapView.region.span.latitudeDelta);

}

- (void)dealloc {
    [super dealloc];
    [regionsMapView release];
}

Answer 1

你重新打印双（latitudeDelta）作为指针。使用%f代替或类似的