• iOS 使用百度地图,仿滴滴打车的定位方法。拖动时时定位


    这里的思路: 
    (1)把图片放到屏幕的中间,这样在拖动的时候就不会跟随着地图移动了。 
    (2)百度地图提供了,View坐标和地理坐标转换的方法。正式这个方法的存在,方便我们及时的获取拖动后的,屏幕中间的图片所在位置的经纬度。

    这里写图片描述

    当拖动地图的时候,定位的图片一直在屏幕的中央,当拖动停止的时候会显示出具体的信息

    #import "HouseTypeMapVC.h"
    
    @interface HouseTypeMapVC ()<BMKMapViewDelegate,BMKLocationServiceDelegate,BMKGeoCodeSearchDelegate>{
    
        BMKLocationService * _locService;
    
    }
    @property (nonatomic,strong) UIView * locationView;
    @property (nonatomic,strong) UIImageView * locImageView;
    @property (nonatomic,strong) UIView * messageView;
    @property (nonatomic,strong) UILabel * addressLabel;
    @property (nonatomic,strong) UIButton * sureButton;
    @property (nonatomic,strong) NSString * name;
    @property (nonatomic,assign) CLLocationCoordinate2D location2D;
    
    @property (nonatomic, strong)BMKGeoCodeSearch* searchAddress;
    @property (strong, nonatomic) IBOutlet BMKMapView *mapView;
    @property (nonatomic,strong)BMKUserLocation *userLocation; //定位功能
    @end
    
    @implementation HouseTypeMapVC
    
    -(void)viewWillAppear:(BOOL)animated{
    
        [super viewWillAppear: animated];
        [_mapView viewWillAppear];
        _mapView.delegate = self; // 此处记得不用的时候需要置nil,否则影响内存的释放
        _locService.delegate = self;
    }
    
    -(void)viewWillDisappear:(BOOL)animated{
        [_mapView viewWillDisappear];
        _mapView.delegate = nil; // 不用时,置nil
        _locService.delegate = nil;
    }
    
    - (void)viewDidLoad {
        [super viewDidLoad];
    }
    
    - (void)initUI{
        [self goBackBtn];
         _mapView.mapType=BMKMapTypeStandard;
        [self initlocationService];
    
    }
    
    #pragma mark --initlocationService--定位
    
    -(void)initlocationService{
    
        _locService = [[BMKLocationService alloc]init];
    
        [_locService startUserLocationService];
        _mapView.showsUserLocation = NO;//先关闭显示的定位图层
        _mapView.userTrackingMode = BMKUserTrackingModeNone;//设置定位的状态
        _mapView.showsUserLocation = YES;//显示定位图层
        _mapView.showMapScaleBar = YES;//显示比例尺
        _mapView.zoomLevel = 17;//地图显示的级别
    
        _searchAddress = [[BMKGeoCodeSearch alloc]init];
        _searchAddress.delegate = self;
    
    }
    
    //这里是创建中心显示的图片和显示详细地址的View
    
    - (void)createLocationSignImage{
    
        //LocationView定位在当前位置,换算为屏幕的坐标,创建的定位的图标
    
        self.locationView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 28, 35)];
        self.locImageView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 28, 35)];
        self.locImageView.image = [UIImage imageNamed:@"myLocation"];
        [self.locationView addSubview:self.locImageView];
    
        //messageView 展示定位信息的View和Label和button
    
        self.messageView = [[UIView alloc]init];
        self.messageView.backgroundColor = [UIColor whiteColor];
    
        //把当前定位的经纬度换算为了View上的坐标
    
        CGPoint point = [self.mapView convertCoordinate:_mapView.centerCoordinate toPointToView:_mapView];
    
        //当解析出现错误的时候,会出现超出屏幕的情况,一种是大于了屏幕,一种是小于了屏幕
        if(point.x > ScreenWidth || point.x < ScreenWidth/5){
    
            point.x = _mapView.centerX;
            point.y = _mapView.centerY-64;
    
        }
    
        NSLog(@"Point------%f-----%f",point.x,point.y);
        //重新定位了LocationView
    
        self.locationView.center = point;
    
        [self.locationView setFrame:CGRectMake(point.x-14, point.y-18, 28, 35)];
    
        //重新定位了messageView
        [self.messageView setFrame:CGRectMake(30, point.y-40-20, SCREEN_WIDTH-60, 40)];
    
        //展示地址信息的label
        self.addressLabel = [[UILabel alloc]initWithFrame:CGRectMake(10, 0, self.messageView.frame.size.width - 80, 40)];
    
        self.addressLabel.font = [UIFont systemFontOfSize:13.0f];
    
        [self.messageView addSubview:self.addressLabel];
    
        //把地址信息传递到上个界面的button
    
        self.sureButton = [[UIButton alloc]initWithFrame:CGRectMake(self.addressLabel.frame.origin.x + self.addressLabel.frame.size.width, 0,self.messageView.frame.size.width - self.addressLabel.frame.origin.x - self.addressLabel.frame.size.width, 40)];
    
        [self.messageView addSubview:self.sureButton];
    
        self.sureButton.backgroundColor = [UIColor colorWithHex:0x2ecb7d];
    
        [self.sureButton setTitle:@"确定" forState:UIControlStateNormal];
    
        self.sureButton.titleLabel.font = [UIFont systemFontOfSize:13.0f];
    
        [self.sureButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    
        [self.sureButton addTarget:self action:@selector(sureButtonClick:) forControlEvents:UIControlEventTouchUpInside];
    
        [self.mapView addSubview:self.messageView];
    
        [self.mapView addSubview:self.locationView];
    
    }
    
    /**
     *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{
    
        BMKCoordinateRegion region;
    
        region.center.latitude  = userLocation.location.coordinate.latitude;
        region.center.longitude = userLocation.location.coordinate.longitude;
        region.span.latitudeDelta = 0;
        region.span.longitudeDelta = 0;
    
        NSLog(@"当前的坐标是:%f,%f",userLocation.location.coordinate.latitude,userLocation.location.coordinate.longitude);
    
    
        [_mapView updateLocationData:userLocation];
        [_locService stopUserLocationService];//取消定位  这个一定要写,不然无法移动定位了
        _mapView.centerCoordinate = userLocation.location.coordinate;
        NSLog(@" _mapView.centerCoordinate------%f-----%f", _mapView.centerCoordinate.latitude, _mapView.centerCoordinate.longitude);
        [self createLocationSignImage];
    
    }
    
    
    //确定按钮的点击
    
    - (void)sureButtonClick:(UIButton *)button{
    
        if([self.chosseAddressDelegate respondsToSelector:@selector(chosseAddressBack:name:point:)]){
           [self.chosseAddressDelegate chosseAddressBack:self.addressLabel.text name:self.name point:self.location2D];
        }
        [self.navigationController popViewControllerAnimated:YES];
    }
    
    - (void)mapView:(BMKMapView *)mapView annotationViewForBubble:(BMKAnnotationView *)view{
        NSLog(@"点击了");
        CLLocationCoordinate2D pt=(CLLocationCoordinate2D){0,0};
        pt=(CLLocationCoordinate2D){mapView.region.center.latitude,mapView.region.center.longitude};
        BMKReverseGeoCodeOption * option = [[BMKReverseGeoCodeOption alloc]init];
        option.reverseGeoPoint = pt;
        BOOL flag=[_searchAddress reverseGeoCode:option];
    
        if (flag) {
    //        _mapView.showsUserLocation=NO;//不显示自己的位置
    
        }
    }
    
    
    //地图被拖动的时候,需要时时的渲染界面,当渲染结束的时候我们就去定位然后获取图片对应的经纬度
    
    - (void)mapView:(BMKMapView *)mapView onDrawMapFrame:(BMKMapStatus*)status{
        NSLog(@"onDrawMapFrame");
    }
    
    - (void)mapView:(BMKMapView *)mapView regionWillChangeAnimated:(BOOL)animated{
         NSLog(@"regionWillChangeAnimated");
    }
    
    - (void)mapView:(BMKMapView *)mapView regionDidChangeAnimated:(BOOL)animated{
         NSLog(@"regionDidChangeAnimated");
    
    
        CGPoint touchPoint = self.locationView.center;
    
        CLLocationCoordinate2D touchMapCoordinate =
        [self.mapView convertPoint:touchPoint toCoordinateFromView:self.mapView];//这里touchMapCoordinate就是该点的经纬度了
        NSLog(@"touching %f,%f",touchMapCoordinate.latitude,touchMapCoordinate.longitude);
    
        BMKReverseGeoCodeOption * option = [[BMKReverseGeoCodeOption alloc]init];
        option.reverseGeoPoint = touchMapCoordinate;
        BOOL flag=[_searchAddress reverseGeoCode:option];
    
        if (flag) {
            //        _mapView.showsUserLocation=NO;//不显示自己的位置
        }
    }
    
    
    //定位自己的位置
    - (IBAction)locationButtonClick:(UIButton *)sender {
    
        [_locService startUserLocationService];
        _mapView.showsUserLocation = NO;//先关闭显示的定位图层
        _mapView.userTrackingMode = BMKUserTrackingModeNone;//设置定位的状态
        _mapView.showsUserLocation = YES;//显示定位图层
    }
    
    //点击地图的空白区域
    
    - (void)mapView:(BMKMapView *)mapView onClickedMapBlank:(CLLocationCoordinate2D)coordinate{
    
        NSLog(@"onClickedMapBlank-latitude==%f,longitude==%f",coordinate.latitude,coordinate.longitude);
    }
    
    //点击地图中的背景有标记的区域
    
    - (void)mapView:(BMKMapView *)mapView onClickedMapPoi:(BMKMapPoi *)mapPoi{
        NSLog(@"点击onClickedMapPoi---%@",mapPoi.text);
    
        CLLocationCoordinate2D coordinate = mapPoi.pt;
        //长按之前删除所有标注
        NSArray *arrayAnmation=[[NSArray alloc] initWithArray:_mapView.annotations];
        [_mapView removeAnnotations:arrayAnmation];
        //设置地图标注
        BMKPointAnnotation* annotation = [[BMKPointAnnotation alloc]init];
        annotation.coordinate = coordinate;
        annotation.title = mapPoi.text;
        [_mapView addAnnotation:annotation];
        BMKReverseGeoCodeOption *re = [[BMKReverseGeoCodeOption alloc] init];
        re.reverseGeoPoint = coordinate;
        [SVProgressHUD show];
        [_searchAddress reverseGeoCode:re];
        BOOL flag =[_searchAddress reverseGeoCode:re];
        if (!flag){
            NSLog(@"search failed!");
        }
    }
    
    //根据经纬度返回点击的位置的名称
    -(void)onGetReverseGeoCodeResult:(BMKGeoCodeSearch *)searcher result:(BMKReverseGeoCodeResult *)result errorCode:(BMKSearchErrorCode)error{
    
        [SVProgressHUD dismiss];
        NSString * resultAddress = @"";
        NSString * houseName = @"";
    
        CLLocationCoordinate2D  coor = result.location;
    
        if(result.poiList.count > 0){
           BMKPoiInfo * info = result.poiList[0];
            if([info.name rangeOfString:@"-"].location != NSNotFound){
                houseName = [info.name componentsSeparatedByString:@"-"][0];
            }else{
                houseName = info.name;
            }
            resultAddress = [NSString stringWithFormat:@"%@%@",result.address,info.name];
        }else{
            resultAddress =result.address;
        }
    
        if(resultAddress.length == 0){
             self.addressLabel.text = @"位置解析错误,请拖动重试!";
            return;
        }
    
        self.addressLabel.text = resultAddress;
    
        self.location2D = coor;
        self.name = houseName;
    }
    
    //点击一个大头针
    
    - (void)mapView:(BMKMapView *)mapView didSelectAnnotationView:(BMKAnnotationView *)view{
         NSLog(@"点击didSelectAnnotationView-");
    }
    
    /**
     *在地图View将要启动定位时,会调用此函数
     *@param mapView 地图View
     */
    - (void)willStartLocatingUser
    {
        NSLog(@"start locate");
    }
    
    /**
     *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
    {
        [_mapView updateLocationData:userLocation];
        NSLog(@"heading is %@",userLocation.heading);
    }
    
    
    /**
     *在地图View停止定位后,会调用此函数
     *@param mapView 地图View
     */
    - (void)didStopLocatingUser
    {
        NSLog(@"stop locate");
    }
    
    /**
     *定位失败后,会调用此函数
     *@param mapView 地图View
     *@param error 错误号,参考CLError.h中定义的错误号
     */
    - (void)didFailToLocateUserWithError:(NSError *)error
    {
        NSLog(@"location error");
    }
    
    - (void)dealloc {
    
        if (_mapView) {
            _mapView = nil;
        }
    }
    
    - (void)didReceiveMemoryWarning {
        [super didReceiveMemoryWarning];
    
    }
    
    @end
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  • 原文地址:https://www.cnblogs.com/-ios/p/6225291.html
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