学步园

- (void)viewDidLoad
｛
    // 初始化位置管理器
    if (![CLLocationManager locationServicesEnabled])
    {
        UIAlertView *locationServiceAlert = [[UIAlertView alloc] initWithTitle:nil message:@"定位不可用" delegate:nil cancelButtonTitle:@"我知道了" otherButtonTitles:nil];
        [locationServiceAlert show];
        [locationServiceAlert release];
    }
    else
    {
        locationManager = [[CLLocationManager alloc] init];
        locationManager.delegate = self;
        [locationManager startUpdatingLocation];
    }
｝

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
    // 获取当前所在的城市名
    CLGeocoder *geocoder = [[CLGeocoder alloc] init]; 
    [geocoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray *array, NSError *error)
    {
        if (array.count > 0)
        {
            CLPlacemark *placemark = [array objectAtIndex:0];
            NSString *city = placemark.locality;
        }
        else if (error == nil && [array count] == 0)
        {
            NSLog(@"No results were returned.");
        }
        else if (error != nil)
        {
            NSLog(@"An error occurred = %@", error);
        }
    }];
}