要得到当前的位置，只需要2步就能完成

      1：判断设备是否支持定位功能，然后创建MKMapView

if ([CLLocationManager locationServicesEnabled]) {        myMapView =[[MKMapView alloc] init];        myMapView.delegate=self;        myMapView.showsUserLocation=YES;    }

       2:实现MKMapViewDelegate协议

-(void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation{    //得到经纬度    CLLocation *newLocation=userLocation.location;    NSLog(@"locaiton---%f---%f",userLocation.coordinate.latitude,userLocation.coordinate.longitude);        //反地理编码    CLGeocoder *clGeoCoder=[[CLGeocoder alloc] init];    CLGeocodeCompletionHandler handle=^(NSArray *placemarks,NSError *error){        for (CLPlacemark *placeMark in placemarks) {                        //获取地理位置名称            NSDictionary *addressDic=placeMark.addressDictionary;            NSString *state=[addressDic objectForKey:@"State"];            NSString *city=[addressDic objectForKey:@"City"];            NSString *subLocality=[addressDic objectForKey:@"SubLocality"];            NSString *street=[addressDic objectForKey:@"Street"];                        NSLog(@"%@%@%@",state,subLocality,street);        }    };//执行    [clGeoCoder reverseGeocodeLocation:newLocation completionHandler:handle];}

那么定位当前位置就完成，代码量非常的少，也非常的简单