写在前面:
项目需求用到这个功能,主要目的是实现老师设置位置签到范围,学生在一定范围内进行签到的功能。
功能如下方截图:
屏幕快照 2019-01-28 上午10.29.26.png
简要介绍:
下面记录一下主要的实现流程,功能的实现主要是根据百度地图开发者官网提供的api文档,各项功能之间组合。百度地图的SDK现在分成了地图功能和定位功能两块不同的SDK,BaIDuMapAPI这个是基础的地图功能,BMKLocationKit这个是定位功能。项目里实现定位签到功能用的的SDK包括上面说的这两个模块,所以在用cocopods引入framework的时候,需要引入: #百度地图 pod 'BMKLocationKit' pod 'BaIDuMapKit'
功能实现
一、在APPdelegate.m文件中引入:
#import <BaIDuMapAPI_Base/BMKBaseComponent.h>#import <BMKLocationKit/BMKLocationComponent.h>
加入功能代码:
#pragma mark 百度地图设置- (voID)configBaIDuMap { Nsstring *ak = @"xxxx"; BMKMapManager *mapManager = [[BMKMapManager alloc] init]; self.mapManager = mapManager; BOol ret = [mapManager start:ak generalDelegate:nil]; [[BMKLocationAuth sharedInstance] checkPermisionWithKey:ak authDelegate:self]; if (!ret) { NSLog(@"manager start Failed!"); }}
二、在用到地图定位功能的vIEwController中
#import <BMKLocationKit/BMKLocationComponent.h>#import <BaIDuMapAPI_Base/BMKBaseComponent.h>//引入base相关所有的头文件#import <BaIDuMapAPI_Map/BMKMapComponent.h>//引入地图功能所有的头文件
遵循协议<BMKMapVIEwDelegate,BMKLocationManagerDelegate>
声明全局变量
@property (nonatomic,strong) BMKUserLocation *userLocation; //当前位置对象@property (nonatomic,strong) BMKLocationManager *locationManager;/** locationManager*/@property (nonatomic,strong) BMKMapVIEw *mapVIEw;/** 百度地图*///@property (nonatomic,strong) BMKPointAnnotation* annotation ;/** 标记*/@property (nonatomic,strong) NSMutableArray *annotationArr;/** 标记数组*/@property (nonatomic,strong) NSMutableArray *circleArr;/** 圆形数组*/
地图SDK文档中建议在以下代码中如此设置, 目的是控制内存
- (voID)vIEwWillAppear:(BOol)animated { [super vIEwWillAppear:animated]; [_mapVIEw vIEwWillAppear]; _mapVIEw.delegate = self;}- (voID)vIEwWilldisappear:(BOol)animated { [super vIEwWilldisappear:animated]; [_mapVIEw vIEwWilldisappear]; _mapVIEw.delegate = nil;}- (voID)dealloc { if (_mapVIEw) { _mapVIEw = nil; }}
初始化数组,这两个数组在接下来会用到
- (NSMutableArray *)annotationArr { if (!_annotationArr) { _annotationArr = [NSMutableArray array]; } return _annotationArr;}- (NSMutableArray *)circleArr { if (!_circleArr) { _circleArr = [NSMutableArray array]; } return _circleArr;}
添加地图vIEw
#pragma mark 添加地图- (voID)addSignmapBgVIEw { if (!self.mapBgVIEw) { UIVIEw *mapBgVIEw = [UIVIEw new]; self.mapBgVIEw = mapBgVIEw; mapBgVIEw.backgroundcolor = [CommUtls colorWithHexString:APP_Bgcolor]; [self addSubvIEw:mapBgVIEw]; [mapBgVIEw makeConstraints:^(MASConstraintMaker *make) { make.top.equalTo(self.tipVIEw.bottom); make.left.right.bottom.equalTo(0); }]; _mapVIEw = [[BMKMapVIEw alloc] initWithFrame:CGRectZero];// _mapVIEw.delegate = self; [_mapVIEw setZoomLevel:21];//精确到5米 _mapVIEw.showsUserLocation = YES;//显示定位图层 [mapBgVIEw addSubvIEw:_mapVIEw]; [_mapVIEw makeConstraints:^(MASConstraintMaker *make) { make.edges.equalTo(0); }]; _mapVIEw.userTrackingMode = BMKUserTrackingModeNone; }}
初始化地图定位:这里我用的是一次定位而没有选择持续定位。
#pragma mark 初始化locationManager- (voID)initUserLocationManager { //因为mapVIEw是在一个分离出来的vIEw中创建的,所以在这里将signSetTypeVIEw中的mapVIEw赋给当前vIEwcontroller的mapVIEw; self.mapVIEw = self.mainVIEw.signSetTypeVIEw.mapVIEw; self.mapVIEw.delegate = self;// self.annotation = [[BMKPointAnnotation alloc] init]; // self.mapVIEw是BMKMapVIEw对象 //精度圈设置 BMKLocationVIEwdisplayParam *param = [[BMKLocationVIEwdisplayParam alloc] init]; //设置显示精度圈,默认YES param.isAccuracyCircleShow = YES; //精度圈 边框颜色 param.accuracyCirclestrokecolor = [UIcolor colorWithRed:242/255.0 green:129/255.0 blue:126/255.0 Alpha:1]; //精度圈 填充颜色 param.accuracyCircleFillcolor = [UIcolor colorWithRed:242/255.0 green:129/255.0 blue:126/255.0 Alpha:0.3]; [self.mapVIEw updateLocationVIEwWithParam:param]; self.userLocation = [[BMKUserLocation alloc] init]; //初始化实例 _locationManager = [[BMKLocationManager alloc] init]; //设置delegate _locationManager.delegate = self; //设置返回位置的坐标系类型 _locationManager.coordinateType = BMKLocationCoordinateTypeBMK09LL; //设置距离过滤参数 _locationManager.distanceFilter = kCLdistanceFilterNone; //设置预期精度参数 _locationManager.desiredAccuracy = kCLLocationAccuracyBest; //设置应用位置类型 _locationManager.activityType = CLActivityTypeautomotiveNavigation; //设置是否自动停止位置更新 _locationManager.pausesLocationUpdatesautomatically = NO; //设置是否允许后台定位 //_locationManager.allowsBackgroundLocationUpdates = YES; //设置位置获取超时时间 _locationManager.locationTimeout = 15; //设置获取地址信息超时时间 _locationManager.reGeocodeTimeout = 15; //请求一次定位 [self requestLocation];}
请求定位,获取经纬度
#pragma mark 请求定位- (voID)requestLocation { [_locationManager requestLocationWithReGeocode:YES withNetworkState:YES completionBlock:^(BMKLocation * _Nullable location,BMKLocationNetworkState state,NSError * _Nullable error) { if (error) { NSLog(@"locError:{%ld - %@};",(long)error.code,error.localizedDescription); } if (location) {//得到定位信息,添加annotation if (location.location) { NSLog(@"LOC = %@",location.location); } if (location.rgcdata) { NSLog(@"rgc = %@",[location.rgcdata description]); } if (!location) { return; } if (!self.userLocation) { self.userLocation = [[BMKUserLocation alloc] init]; } self.userLocation.location = location.location; [self.mapVIEw updateLocationData:self.userLocation]; CLLocationCoordinate2D mycoordinate = location.location.coordinate; self.mapVIEw.centerCoordinate = mycoordinate; //赋予初始值 self.viewmodel.lat = [Nsstring stringWithFormat:@"%f",location.location.coordinate.latitude]; self.viewmodel.lng = [Nsstring stringWithFormat:@"%f",location.location.coordinate.longitude]; self.viewmodel.radius = @"50"; //打印经纬度 NSLog(@"dIDUpdateUserLocation lat %f,long %f",location.location.coordinate.latitude,location.location.coordinate.longitude); } NSLog(@"netstate = %d",state); }];}
地图长按选点功能实现:
//长按地图选点- (voID)mapvIEw:(BMKMapVIEw *)mapVIEw onLongClick:(CLLocationCoordinate2D)coordinate { if (self.annotationArr.count > 0) { [mapVIEw removeAnnotations:self.annotationArr]; [self.annotationArr removeAllObjects]; BMKPointAnnotation *annotation = [[BMKPointAnnotation alloc]init]; annotation.coordinate = coordinate; [self.annotationArr addobject:annotation]; [mapVIEw addAnnotations:self.annotationArr]; } else { BMKPointAnnotation *annotation = [[BMKPointAnnotation alloc]init]; annotation.coordinate = coordinate; [self.annotationArr addobject:annotation]; [mapVIEw addAnnotations:self.annotationArr]; } //d出半径选择框 [self showLocationSelecTradiusVIEwWithCoordinate:coordinate];}
选点后d出选择定位范围d框
#pragma mark d出位置d框- (voID)showLocationSelecTradiusVIEwWithCoordinate:(CLLocationCoordinate2D)coordinate { ExtraActLocationSignPopVIEw *popVIEw = [ExtraActLocationSignPopVIEw new]; [popVIEw show]; @weakify(self); [popVIEw.locatioonSureSignal subscribeNext:^(Nsstring *x) { @strongify(self); self.viewmodel.radius = x; CGfloat radius = [x floatValue]; [self circleWithCenterWithCoordinate2D:coordinate radius:radius]; }];}
设置好定位点以及半径范围后绘制范围圈,开始的时候声明的circleArr在这里用来盛放添加的区域圆形,在添加新的圆圈的时候,将之前旧的移除,保证每次绘制的范围都是最新的,同理annotationArr也是这个功能,因为API有提供的- (voID)addOverlays:(NSArray *)overlays;这个方法:/** *向地图窗口添加一组Overlay,需要实现BMKMapVIEwDelegate的-mapVIEw:vIEwForOverlay:函数来生成标注对应的VIEw *@param overlays 要添加的overlay数组 */
#pragma mark 添加区域圆形覆盖- (voID)circleWithCenterWithCoordinate2D:(CLLocationCoordinate2D )coor radius:(CGfloat)radius { NSLog(@"coordinate lat %f,coor.latitude,coor.longitude); //赋予点击选点值 self.viewmodel.lat = [Nsstring stringWithFormat:@"%f",coor.latitude]; self.viewmodel.lng = [Nsstring stringWithFormat:@"%f",coor.longitude]; if (self.circleArr.count > 0) { [_mapVIEw removeOverlays:self.circleArr]; [self.circleArr removeAllObjects]; BMKCircle *circle = [BMKCircle circleWithCenterCoordinate:coor radius:radius]; [self.circleArr addobject:circle]; [_mapVIEw addOverlays:self.circleArr]; } else { BMKCircle *circle = [BMKCircle circleWithCenterCoordinate:coor radius:radius]; [self.circleArr addobject:circle]; [_mapVIEw addOverlays:self.circleArr]; }}#pragma mark 重绘overlay- (BMKOverlayVIEw *)mapVIEw:(BMKMapVIEw *)mapVIEw vIEwForOverlay:(ID <BMKOverlay>)overlay{ if ([overlay isKindOfClass:[BMKCircle class]]){ BMKCircleVIEw* circleVIEw = [[BMKCircleVIEw alloc] initWithOverlay:overlay]; circleVIEw.fillcolor = [UIcolor colorWithRed:33/255.0 green:196/255.0 blue:206/255.0 Alpha:0.3]; circleVIEw.strokecolor = [UIcolor colorWithRed:33/255.0 green:196/255.0 blue:206/255.0 Alpha:1]; circleVIEw.linewidth = 1.0; return circleVIEw; } return nil;}
至此,在地图上选点进行签到功能基本实现,另外,关于 自定义的范围圆圈的颜色,边框大小都是可以自定义的,选点的标记也是可以自定义的,官方文档有说明
总结
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