iOS 百度地图获取当前地理位置

//
//  ViewController.m
//  BaiDuDemo
//
//  Created by Chocolate. on 15-3-2.
//  Copyright (c) 2015年 redasen. All rights reserved.
//

#import "ViewController.h"
#import "BMapKit.h"

@interface ViewController () <BMKGeoCodeSearchDelegate,BMKMapViewDelegate, BMKLocationServiceDelegate>
@property (strong, nonatomic) BMKMapView *mapView;
@property (strong, nonatomic) BMKGeoCodeSearch *search;
@property (strong, nonatomic) BMKLocationService *locService;
@end

@implementation ViewController
{
    BMKUserLocation *myLocation;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    _mapView = [[BMKMapView alloc] initWithFrame:self.view.bounds];
    [self.view addSubview:_mapView];

    _search = [[BMKGeoCodeSearch alloc]init];

    //初始化BMKLocationService
    _locService = [[BMKLocationService alloc]init];
    _locService.delegate = self;
    //启动LocationService
    [_locService startUserLocationService];
}

-(void)viewWillAppear:(BOOL)animated
{
    [_mapView viewWillAppear];
    _mapView.delegate = self;
     _search.delegate = self;
}

-(void)viewDidAppear:(BOOL)animated
{
    [_mapView setShowsUserLocation:YES];
}

-(void)viewWillDisappear:(BOOL)animated
{
    [_mapView setShowsUserLocation:NO];
    _mapView.delegate = nil;
    _search.delegate = nil;
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark - BMKLocationServiceDelegate
/**
 *在将要启动定位时，会调用此函数
 */
- (void)willStartLocatingUser
{

}

/**
 *在停止定位后，会调用此函数
 */
- (void)didStopLocatingUser
{
    CLLocationCoordinate2D pt = (CLLocationCoordinate2D){0, 0};

    pt = (CLLocationCoordinate2D){myLocation.location.coordinate.latitude, myLocation.location.coordinate.longitude};

    BMKReverseGeoCodeOption *option = [[BMKReverseGeoCodeOption alloc]init];
    option.reverseGeoPoint = pt;
    BOOL result = [_search reverseGeoCode:option];

    if(result)
    {
        NSLog(@"反geo检索发送成功");
    }
    else
    {
        NSLog(@"反geo检索发送失败");
    }
}

/**
 *用户方向更新后，会调用此函数
 *@param userLocation 新的用户位置
 */
- (void)didUpdateUserHeading:(BMKUserLocation *)userLocation
{
    NSLog(@"heading is %@",userLocation.heading);
}

/**
 *用户位置更新后，会调用此函数
 *@param userLocation 新的用户位置
 */
- (void)didUpdateBMKUserLocation:(BMKUserLocation *)userLocation
{
    if (userLocation != nil) {

        NSLog(@"get location success");
        myLocation = userLocation;
        _mapView.showsUserLocation = NO;
        [_locService stopUserLocationService];
    }

    NSLog(@"didUpdateUserLocation lat %f,long %f",userLocation.location.coordinate.latitude,userLocation.location.coordinate.longitude);
}

/**
 *定位失败后，会调用此函数
 *@param error 错误号
 */
- (void)didFailToLocateUserWithError:(NSError *)error
{

}

#pragma mark - BMKGeoCodeSearchDelegate

/**
 *返回地址信息搜索结果
 *@param searcher 搜索对象
 *@param result 搜索结BMKGeoCodeSearch果
 *@param error 错误号，@see BMKSearchErrorCode
 */
- (void)onGetGeoCodeResult:(BMKGeoCodeSearch *)searcher result:(BMKGeoCodeResult *)result errorCode:(BMKSearchErrorCode)error
{

}

/**
 *返回反地理编码搜索结果
 *@param searcher 搜索对象
 *@param result 搜索结果
 *@param error 错误号，@see BMKSearchErrorCode
 */
- (void)onGetReverseGeoCodeResult:(BMKGeoCodeSearch *)searcher result:(BMKReverseGeoCodeResult *)result errorCode:(BMKSearchErrorCode)error
{
    UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"" message:result.address delegate:self cancelButtonTitle:@"关闭" otherButtonTitles:nil, nil];
    [alert show];
}

@end