CLLocation获得EXC_BAD_ACCESS

Question

我在尝试访问CLLocation时遇到错误，您能解释一下原因吗？

CLLocation *currentLocation;
@property (nonatomic, retain) CLLocation *currentLocation;

我正在通过位置管理员对该位置进行反馈：

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {

    if (newLocation != nil) {
        currentLocation = newLocation;
        NSLog(@"locationManager: %@", currentLocation);
    }
}

  

locationManager：＆lt; +36.45307493，   + 28.22220462＆GT; +/- 100.00m（速度-1.00 mps /航向-1.00）@ 9/2/11 10:14:58   π.μ. GMT + 02：00

但是当我尝试从DidSelectAnnotationView访问currentLocation时，我得到了EXC_BAD_ACCESS：

- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view {

    NSLog(@"current Location: %@", currentLocation);

}

你可以解释为什么我无法访问它吗？

非常感谢！

Answer 1

您没有保留该位置。这样做：

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {

    if (newLocation != nil) {
        self.currentLocation = newLocation; /// The change is here
        NSLog(@"locationManager: %@", currentLocation);
    }
}