未调用CLLocationManager委托

Question

我CLLocationManager在设备上使用,并且没有调用委托方法.这是我的代码(我可以看到该类也没有被解除分配):

#import <Foundation/Foundation.h>
#import <CoreLocation/CoreLocation.h>

@interface CurrentLocation : NSObject <CLLocationManagerDelegate> {
    CLLocationManager *locationManager;

}
@property (nonatomic, retain) CLLocationManager *locationManager;  

@end

#import "CurrentLocation.h"
#import "SBJson.h"
@implementation CurrentLocation
@synthesize locationManager;

- (id)init
{
    self = [super init];
    if (self) {
        NSLog(@"Initialized");
        locationManager = [[[CLLocationManager alloc] init] autorelease];
        locationManager.delegate = self;
        [locationManager startUpdatingLocation];
        BOOL enable = [CLLocationManager locationServicesEnabled];
        NSLog(@"%@", enable? @"Enabled" : @"Not Enabled");
    }

    return self;
}

- (void)locationManager:(CLLocationManager *)manager
    didUpdateToLocation:(CLLocation *)newLocation
           fromLocation:(CLLocation *)oldLocation {
    NSLog(@"A");
    NSString *stringURL = [NSString stringWithFormat:@"http://maps.googleapis.com/maps/api/geocode/json?latlng=%f,%f&sensor=true", newLocation.coordinate.latitude, newLocation.coordinate.longitude];
    NSLog(@"%@", stringURL);

    NSURL *url = [NSURL URLWithString:stringURL];

    NSData *data = [NSURLConnection sendSynchronousRequest:[NSURLRequest requestWithURL:url] returningResponse:nil error:nil];

    SBJsonParser *parser = [[SBJsonParser alloc] init];
    NSDictionary *dict = [parser objectWithData:data];
    NSLog(@"%@", dict);
}

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
    NSLog(@"B");
}

- (void)dealloc {
    NSLog(@"Dealloc called");
    [super dealloc];
    [locationManager release];
}

@end

在日志中,我看到:

2011-10-02 19:49:04.095 DixieMatTracker[1404:707] Initialized
2011-10-02 19:49:04.109 DixieMatTracker[1404:707] Enabled

我究竟做错了什么？谢谢

Answer 1

你使用的是locationManagerivar,而不是财产; 这意味着它CLLocationManager不会被保留,并且会在您自动释放它时释放.用途self.locationManager:

self.locationManager = [[[CLLocationManager alloc] init] autorelease];