CLLocationManager *locationManager;//定义Manager
// 判断定位操作是否被允许
if([CLLocationManager locationServicesEnabled]) {
  CLLocationManager *locationManager = [[[CLLocationManager alloc] init] autorelease];

   self.locationManager.delegate = self;
}else {
   //提示用户无法进行定位操作
}

// 开始定位
[locationManager startUpdatingLocation];

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

 //latitude和lontitude均为NSString型变量
    //纬度
 self.latitude = [NSString stringWithFormat:@"%.4f", newLocation.coordinate.latitude];

    //经度
 self.longitude = [NSString stringWithFormat:@"%.4f",     newLocation.coordinate.longitude];
 
}

-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
  //此处locations存储了持续更新的位置坐标值，取最后一个值为最新位置，如果不想让其持续更新位置，则在此方法中获取到一个值之后让locationManager stopUpdatingLocation
  CLLocation *currentLocation = [locations lastObject];
  
  CLLocationCoordinate2D coor = currentLocation.coordinate;
  self.latitude = coor.latitude;
  self.longitude = coor.longitude;
  
  //[self.locationManager stopUpdatingLocation];
  
}

- (void)locationManager:(CLLocationManager *)manager
    didFailWithError:(NSError *)error {
 
 if (error.code == kCLErrorDenied) {
   // 提示用户出错原因，可按住Option键点击 KCLErrorDenied的查看更多出错信息，可打印error.code值查找原因所在
 }
}