iOS 使用百度地图进行定位和路线规划-白红宇

先去百度地图开发者中心申请APPkey：http://developer.baidu.com/map/index.php?title=iossdk ，下载百度地图的SDK。

导入SDK的framework文件，BaiduMapAPI_Base.framework是基础包，是必须要导入的，根据自己的需求导入需要的百度SDK的framework，新版的SDK已经可以选择下载哪些framework，减小了包的大小。

引入所需的系统库，在Xcode工程中引入

CoreLocation.framework                    QuartzCore.framework                    OpenGLES.framework                    SystemConfiguration.framework                    CoreGraphics.framework                    Security.framework                    libsqlite3.0.tbd（xcode7以前为 libsqlite3.0.dylib）                    CoreTelephony.framework                    libstdc++.6.0.9.tbd（xcode7以前为libstdc++.6.0.9.dylib）复制代码

根据需求引入头文件，我们只要定位，搜索和路线绘制，所以不必要全部引入。

#import 
    
     //引入base相关所有的头文件 #import 
     
      //引入地图功能所有的头文件 #import 
      
       //引入检索功能所有的头文件 #import 
       
        //引入云检索功能所有的头文件 #import 
        
         //引入定位功能所有的头文件 #import 
         
          //引入计算工具所有的头文件 #import 
          
           //引入周边雷达功能所有的头文件 #import < BaiduMapAPI_Map/BMKMapView.h>//只引入所需的单个头文件复制代码

下面开始进行代码的实践：

首先引用代理方法：

BMKMapViewDelegate//基础代理BMKRouteSearchDelegate//搜索代理BMKLocationServiceDelegate//定位代理BMKGeoCodeSearchDelegate//地理反编码代理复制代码

定义声明文件：

@interface RouteSearchDemoViewController : BaseViewCtrl
    
      {    IBOutlet BMKMapView* _mapView;//地图view    IBOutlet UITextField* _startCityText;//开始的城市    IBOutlet UITextField* _startAddrText;//开始的位置    IBOutlet UITextField* _endCityText;//终点城市    IBOutlet UITextField* _endAddrText;//终点位置    BMKRouteSearch* _routesearch;//搜索    BMKLocationService *locService;//定位}-(IBAction)onClickBusSearch;//公交路线-(IBAction)onClickDriveSearch;//开车路线-(IBAction)onClickWalkSearch;//不行路线- (IBAction)textFiledReturnEditing:(id)sender;@property(nonatomic,retain)MapAlertView *mapview;//一个遮盖view@end复制代码

使用的是类中使用了XIB文件，所以根据自己的需要进行控件的拖放、位置及大小设置。

在实现文件中添加一个图片出的函数，有些路线的绘制和图标的变化需要用到（百度的Demo中就有这个函数）

@implementation UIImage(InternalMethod)- (UIImage*)imageRotatedByDegrees:(CGFloat)degrees{        CGFloat width = CGImageGetWidth(self.CGImage);    CGFloat height = CGImageGetHeight(self.CGImage);        CGSize rotatedSize;        rotatedSize.width = width;    rotatedSize.height = height;        UIGraphicsBeginImageContext(rotatedSize);    CGContextRef bitmap = UIGraphicsGetCurrentContext();    CGContextTranslateCTM(bitmap, rotatedSize.width/2, rotatedSize.height/2);    CGContextRotateCTM(bitmap, degrees * M_PI / 180);    CGContextRotateCTM(bitmap, M_PI);    CGContextScaleCTM(bitmap, -1.0, 1.0);    CGContextDrawImage(bitmap, CGRectMake(-rotatedSize.width/2, -rotatedSize.height/2, rotatedSize.width, rotatedSize.height), self.CGImage);    UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();    UIGraphicsEndImageContext();    return newImage;}@end复制代码

下面就到了地图的真正实施阶段： 封装一个获取资源文件的函数，从百度的bundle中获取图片等等：

- (void)viewDidLoad {    [super viewDidLoad];    //适配ios7    if( ([[[UIDevice currentDevice] systemVersion] doubleValue]>=7.0))    {        self.navigationController.navigationBar.translucent = NO;    }    _routesearch = [[BMKRouteSearch alloc] init];     _routesearch.delegate = self;    [_mapView setZoomEnabled:YES];    [_mapView setZoomLevel:13];//级别，3-19    _mapView.showMapScaleBar = YES;//比例尺    _mapView.mapScaleBarPosition = CGPointMake(10,_mapView.frame.size.height-45);//比例尺的位置    _mapView.showsUserLocation=YES;//显示当前设备的位置    _mapView.userTrackingMode = BMKUserTrackingModeFollow;//定位跟随模式    _mapView.delegate = self;    [_mapView setMapType:BMKMapTypeStandard];//地图的样式(标准地图)        //定位    locService = [[BMKLocationService alloc] init];    locService.delegate = self;    //启动LocationService    [locService startUserLocationService];}复制代码

开始定位，并且地理反编码，获取到位置信息：

/** *  更新定位信息 * *  @param userLocation 获取到的位置数据 */-(void)didUpdateBMKUserLocation:(BMKUserLocation *)userLocation {        CLLocationCoordinate2D coordinate = userLocation.location.coordinate;    // 缩放    BMKCoordinateSpan span = BMKCoordinateSpanMake(0.1, 0.1);    BMKCoordinateRegion region = BMKCoordinateRegionMake(coordinate, span);    [_mapView setRegion:region];        BMKReverseGeoCodeOption *option = [[BMKReverseGeoCodeOption alloc] init];    option.reverseGeoPoint = CLLocationCoordinate2DMake(userLocation.location.coordinate.latitude, userLocation.location.coordinate.longitude);    BMKGeoCodeSearch *geoCode = [[BMKGeoCodeSearch alloc] init];    geoCode.delegate = self;    [geoCode reverseGeoCode:option];    [option release];    [geoCode release];}/** *  反编码地理位置返回代理 * *  @param result   返回结果 */-(void)onGetReverseGeoCodeResult:(BMKGeoCodeSearch *)searcher result:(BMKReverseGeoCodeResult *)result errorCode:(BMKSearchErrorCode)error {    if (result) {        _startCityText.text = result.addressDetail.city;;        _startAddrText.text = result.addressDetail.streetName;        //已经获取到经纬度，可以停止定位服务        [locService stopUserLocationService];    }}复制代码

经过上面的两个函数，已经可以获取到所在的城市跟位置地址，具体更加详细的信息，可以在addressDetail中看到，一般就是所在的区，街道，街道号码等。

在view上自己添加一个按钮，当点击的时候弹出一个自定义alertview，上面有三个按钮，分别是公交，行车，步行，并且添加一个手势，点击按钮之外的地方，remove或者隐藏alertview。

点击需要进行的导航线路绘制，有对应的搜索类：

-(IBAction)onClickBusSearch{    if ([_startCityText.text isEqualToString:@""]) {         [self AddStatusLabelWithText:@"正在获取位置"];        return;    }    [self.mapview removeFromSuperview];    BMKPlanNode* start = [[[BMKPlanNode alloc]init] autorelease];    start.name = _startAddrText.text;    BMKPlanNode* end = [[[BMKPlanNode alloc]init] autorelease];    end.name = _endAddrText.text;        //公交    BMKTransitRoutePlanOption *transitRouteSearchOption = [[BMKTransitRoutePlanOption alloc]init];    transitRouteSearchOption.city = _startCityText.text;    transitRouteSearchOption.from = start;    transitRouteSearchOption.to = end;    BOOL flag = [_routesearch transitSearch:transitRouteSearchOption];        [transitRouteSearchOption release];    if(flag)    {        NSLog(@"bus检索发送成功");    }    else    {        NSLog(@"bus检索发送失败");    }}-(IBAction)onClickDriveSearch{    if ([_startCityText.text isEqualToString:@""]) {        [self AddStatusLabelWithText:@"正在获取位置"];        return;    }    [self.mapview removeFromSuperview];    BMKPlanNode* start = [[[BMKPlanNode alloc]init] autorelease];    start.name = _startAddrText.text;    BMKPlanNode* end = [[[BMKPlanNode alloc]init] autorelease];    end.name = _endAddrText.text;        /// 驾车查询基础信息类    BMKDrivingRoutePlanOption *drivingRouteSearchOption = [[BMKDrivingRoutePlanOption alloc]init];    drivingRouteSearchOption.from = start;    drivingRouteSearchOption.to = end;    BOOL flag = [_routesearch drivingSearch:drivingRouteSearchOption];    [drivingRouteSearchOption release];    if(flag)    {        NSLog(@"car检索发送成功");    }    else    {        NSLog(@"car检索发送失败");    }}-(IBAction)onClickWalkSearch{    if ([_startCityText.text isEqualToString:@""]) {    [self AddStatusLabelWithText:@"正在获取位置"];    return;}    [self.mapview removeFromSuperview];    BMKPlanNode* start = [[[BMKPlanNode alloc]init] autorelease];    start.name = _startAddrText.text;    BMKPlanNode* end = [[[BMKPlanNode alloc]init] autorelease];    end.name = _endAddrText.text;    /// 步行查询基础信息类    BMKWalkingRoutePlanOption *walkingRouteSearchOption = [[BMKWalkingRoutePlanOption alloc]init];    walkingRouteSearchOption.from = start;    walkingRouteSearchOption.to = end;    BOOL flag = [_routesearch walkingSearch:walkingRouteSearchOption];    [walkingRouteSearchOption release];    if(flag)    {        NSLog(@"walk检索发送成功");    }    else    {        NSLog(@"walk检索发送失败");    }}复制代码

每个start的城市和地址都可以设置，其中公交线路的start城市和transitRouteSearchOption的城市是必须要有的，否则会检索失败或者检索不到线路；

发送检索成功后会回调对应的绘制线路代理方法：

- (void)onGetTransitRouteResult:(BMKRouteSearch*)searcher result:(BMKTransitRouteResult*)result errorCode:(BMKSearchErrorCode)error{    MapExplainViewController *exp=[[[MapExplainViewController alloc]init]autorelease];    exp.array=result.routes;    [self.navigationController pushViewController:exp animated:YES];    NSArray* array = [NSArray arrayWithArray:_mapView.annotations];    [_mapView removeAnnotations:array];    array = [NSArray arrayWithArray:_mapView.overlays];    [_mapView removeOverlays:array];    if (error == BMK_SEARCH_NO_ERROR) {        BMKTransitRouteLine* plan = (BMKTransitRouteLine*)[result.routes objectAtIndex:0];        // 计算路线方案中的路段数目        int size = [plan.steps count];        int planPointCounts = 0;        for (int i = 0; i < size; i++) {            BMKTransitStep* transitStep = [plan.steps objectAtIndex:i];            if(i==0){                RouteAnnotation* item = [[RouteAnnotation alloc]init];                item.coordinate = plan.starting.location;                item.title = @"起点";                item.type = 0;                [_mapView addAnnotation:item]; // 添加起点标注                [item release];                            }else if(i==size-1){                RouteAnnotation* item = [[RouteAnnotation alloc]init];                item.coordinate = plan.terminal.location;                item.title = @"终点";                item.type = 1;                [_mapView addAnnotation:item]; // 添加起点标注                [item release];            }            RouteAnnotation* item = [[RouteAnnotation alloc]init];            item.coordinate = transitStep.entrace.location;            item.title = transitStep.instruction;            item.type = 3;            [_mapView addAnnotation:item];            [item release];                        //轨迹点总数累计            planPointCounts += transitStep.pointsCount;        }                //轨迹点        BMKMapPoint * temppoints = new BMKMapPoint[planPointCounts];        int i = 0;        for (int j = 0; j < size; j++) {            BMKTransitStep* transitStep = [plan.steps objectAtIndex:j];            int k=0;            for(k=0;k

搜索的回调代理成功后，需要在mapview 上绘制线条：

///<0:起点 1：终点 2：公交 3：地铁 4:驾乘 5:途经点- (BMKAnnotationView*)getRouteAnnotationView:(BMKMapView *)mapview viewForAnnotation:(RouteAnnotation*)routeAnnotation{    BMKAnnotationView* view = nil;    switch (routeAnnotation.type) {        case 0:        {            view = [mapview dequeueReusableAnnotationViewWithIdentifier:@"start_node"];            if (view == nil) {                view = [[[BMKAnnotationView alloc]initWithAnnotation:routeAnnotation reuseIdentifier:@"start_node"] autorelease];                view.image = [UIImage imageWithContentsOfFile:[self getMyBundlePath1:@"images/icon_nav_start.png"]];                view.centerOffset = CGPointMake(0, -(view.frame.size.height * 0.5));                view.canShowCallout = TRUE;            }            view.annotation = routeAnnotation;        }            break;        case 1:        {            view = [mapview dequeueReusableAnnotationViewWithIdentifier:@"end_node"];            if (view == nil) {                view = [[[BMKAnnotationView alloc]initWithAnnotation:routeAnnotation reuseIdentifier:@"end_node"] autorelease];                view.image = [UIImage imageWithContentsOfFile:[self getMyBundlePath1:@"images/icon_nav_end.png"]];                view.centerOffset = CGPointMake(0, -(view.frame.size.height * 0.5));                view.canShowCallout = TRUE;            }            view.annotation = routeAnnotation;        }            break;        case 2:        {            view = [mapview dequeueReusableAnnotationViewWithIdentifier:@"bus_node"];            if (view == nil) {                view = [[[BMKAnnotationView alloc]initWithAnnotation:routeAnnotation reuseIdentifier:@"bus_node"] autorelease];                view.image = [UIImage imageWithContentsOfFile:[self getMyBundlePath1:@"images/icon_nav_bus.png"]];                view.canShowCallout = TRUE;            }            view.annotation = routeAnnotation;        }            break;        case 3:        {            view = [mapview dequeueReusableAnnotationViewWithIdentifier:@"rail_node"];            if (view == nil) {                view = [[[BMKAnnotationView alloc]initWithAnnotation:routeAnnotation reuseIdentifier:@"rail_node"] autorelease];                view.image = [UIImage imageWithContentsOfFile:[self getMyBundlePath1:@"images/icon_nav_rail.png"]];                view.canShowCallout = TRUE;            }            view.annotation = routeAnnotation;        }            break;        case 4:        {            view = [mapview dequeueReusableAnnotationViewWithIdentifier:@"route_node"];            if (view == nil) {                view = [[[BMKAnnotationView alloc]initWithAnnotation:routeAnnotation reuseIdentifier:@"route_node"] autorelease];                view.canShowCallout = TRUE;            } else {                [view setNeedsDisplay];            }                        UIImage* image = [UIImage imageWithContentsOfFile:[self getMyBundlePath1:@"images/icon_direction.png"]];            view.image = [image imageRotatedByDegrees:routeAnnotation.degree];            view.annotation = routeAnnotation;                    }            break;        case 5:        {            view = [mapview dequeueReusableAnnotationViewWithIdentifier:@"waypoint_node"];            if (view == nil) {                view = [[[BMKAnnotationView alloc]initWithAnnotation:routeAnnotation reuseIdentifier:@"waypoint_node"] autorelease];                view.canShowCallout = TRUE;            } else {                [view setNeedsDisplay];            }                        UIImage* image = [UIImage imageWithContentsOfFile:[self getMyBundlePath1:@"images/icon_nav_waypoint.png"]];            view.image = [image imageRotatedByDegrees:routeAnnotation.degree];            view.annotation = routeAnnotation;        }            break;        default:            break;    }        return view;}- (BMKAnnotationView *)mapView:(BMKMapView *)view viewForAnnotation:(id 
    
     )annotation{    if ([annotation isKindOfClass:[RouteAnnotation class]]) {        return [self getRouteAnnotationView:view viewForAnnotation:(RouteAnnotation*)annotation];    }    return nil;}//加载线路- (BMKOverlayView*)mapView:(BMKMapView *)map viewForOverlay:(id
     
      )overlay{    if ([overlay isKindOfClass:[BMKPolyline class]]) {        BMKPolylineView* polylineView = [[[BMKPolylineView alloc] initWithOverlay:overlay] autorelease];        polylineView.fillColor = [[UIColor cyanColor] colorWithAlphaComponent:1];        polylineView.strokeColor = [[UIColor blueColor] colorWithAlphaComponent:0.7];        polylineView.lineWidth = 3.0;        return polylineView;    }    return nil;}复制代码

经过以上方法，基本上在mapview上就可以看到线路导航图，如果不行，可以那些错误枚举去查看原因，毕竟百度是中国的，所以SDK里的注释都是中文，对于英文渣渣的我来说，简直太幸福了。

还有一个地方使用了百度定位来获取天气信息，比系统的地理反编码快很多，很快就获取到了所在位置的城市。

同样的天气api使用的是百度天气，返回的数据里直接就有对应天气的图片的url，虽然图片很丑，但是总比没有的强，下面是百度天气的api地址：

-(void)WeatherRequest{     [self ShowWaitView:@"正在加载中。。。"];    //[GlobalData GetInstance].GB_CityString 是自己获取到城市    NSString *str = [[GlobalData GetInstance].GB_CityString URLEncoding];    //用定位的城市请求 ak是自己申请的百度密钥    NSString *strurl=[NSString stringWithFormat:@"http://api.map.baidu.com/telematics/v3/weather?location=%@&output=json&ak=C3d2845360d091a5e8f42f605b7472ea",str];    ASIFormDataRequest *weatherRequest = [[ASIFormDataRequest alloc] initWithURL:[NSURL URLWithString:strurl]];        weatherRequest.delegate = self;    [weatherRequest startAsynchronous];}复制代码