这次给大家分享一个在地图上画出行程,轨迹的方法.
我使用的是高德地图SDK.
首先得初始化高德地图,在Appdelegate.m中
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions;
初始化高德地图. GDAPIKey就是你申请的key.
//高德地图SDK
- (void)configureAPIKey {
[MAMapServices sharedServices].apiKey = (NSString *)GDAPIKey;
}
然后你需要在你使用地图的那个类的.m文件的后缀改成.mm.
我们现在创建一个地图.并且打开定位.
- (instancetype)init {
self = [super init];
if (self) {
self.pointArr = [NSMutableArray array];//存储轨迹的数组.
[self setMapView];
}
return self;
}
- (void)setMapView {
//地图初始化
self.mapView = [[MAMapView alloc] initWithFrame:[UIScreen mainScreen].bounds];
_mapView.backgroundColor = [UIColor whiteColor];
self.mapView.delegate = self;
//设置定位精度
_mapView.desiredAccuracy = kCLLocationAccuracyBest;
//设置定位距离
_mapView.distanceFilter = 1.0f;
//普通样式
_mapView.mapType = MAMapTypeStandard;
//地图跟着位置移动
[_mapView setUserTrackingMode:MAUserTrackingModeFollow animated:YES];
//设置成NO表示关闭指南针；YES表示显示指南针
_mapView.showsCompass= YES;
//设置指南针位置
_mapView.compassOrigin= CGPointMake(_mapView.compassOrigin.x, 22);
//设置成NO表示不显示比例尺；YES表示显示比例尺
_mapView.showsScale= YES;
//设置比例尺位置
_mapView.scaleOrigin= CGPointMake(_mapView.scaleOrigin.x, 22);
//开启定位
_mapView.showsUserLocation = YES;
//缩放等级
[_mapView setZoomLevel:18 animated:YES];
//防止系统自动杀掉定位 -- 后台定位
_mapView.pausesLocationUpdatesAutomatically = NO;
_mapView.allowsBackgroundLocationUpdates = YES;
[self.view addSubview:self.mapView];
}
实现相应的协议.
#pragma mark - MAMapViewDelegate
//当位置改变时候调用
- (void)mapView:(MAMapView *)mapView didUpdateUserLocation:(MAUserLocation *)userLocation updatingLocation:(BOOL)updatingLocation {
//updatingLocation 标示是否是location数据更新, YES:location数据更新 NO:heading数据更新
if (updatingLocation == YES) {
self.currentUL = userLocation;//设置当前位置
//手机位置信息
[self setPointArrWithCurrentUserLocation];
}
}
//定位失败
- (void)mapView:(MAMapView *)mapView didFailToLocateUserWithError:(NSError *)error {
NSString *errorString = @"";
switch([error code]) {
case kCLErrorDenied:
//Access denied by user
errorString = @"Access to Location Services denied by user";
break;
case kCLErrorLocationUnknown:
//Probably temporary...
errorString = @"Location data unavailable";
//Do something else...
break;
default:
errorString = @"An unknown error has occurred";
break;
}
}
那么重点来了,既然要画出轨迹,就要设置地图覆盖物.
//画线方法
- (MAOverlayView *)mapView:(MAMapView *)mapView viewForOverlay:(id <MAOverlay>)overlay {
//画线
if ([overlay isKindOfClass:[MAPolyline class]]) {
MAPolylineView *polylineView = [[MAPolylineView alloc] initWithPolyline:overlay];
polylineView.lineWidth = 8.f;
polylineView.strokeColor = [UIColor colorWithRed:177 / 255.0 green:152 / 255.0 blue:198 / 255.0 alpha:0.6];
return polylineView;
}
return nil;
}
然后上方在在位置变更的时候调用了一个方法.我把每个变更的点统一转成MAPointAnnotation对象,并且添加到数组.
[self setPointArrWithCurrentUserLocation];
//设置数组元素并且去执行画线操作
- (void)setPointArrWithCurrentUserLocation {
// NSLog(@"记录一个点");
//检查零点
if (_currentUL.location.coordinate.latitude == 0.0f ||
_currentUL.location.coordinate.longitude == 0.0f)
return;
MAPointAnnotation *point = [[MAPointAnnotation alloc] init];
point.coordinate = _currentUL.location.coordinate;
[_pointArr addObject:point];
//画线
[self drawTrackingLine];
}
然后开始执行画线操作.
//绘制旅行路线
- (void)drawTrackingLine {
MAMapPoint *pointArray = new MAMapPoint[_pointArr.count];//创建结构体数组
for(int index = 0; index < _pointArr.count; index++) {
MAPointAnnotation *locationUser = [[MAPointAnnotation alloc] init];
locationUser = [_pointArr objectAtIndex:index];
MAMapPoint point = MAMapPointForCoordinate(locationUser.coordinate);
pointArray[index] = point;
}
//在每次画出轨迹线的时候把之前的线删除掉.不然会多次添加.
if (self.routeLine) {
[self.mapView removeOverlay:self.routeLine];
}
self.routeLine = [MAPolyline polylineWithPoints:pointArray count:_pointArr.count];
if (nil != self.routeLine) {
//将折线绘制在地图底图标注和兴趣点图标之下
[self.mapView addOverlay:self.routeLine];
}
delete []pointArray;
}
这样子就可以运行了.整个轨迹记录的过程分享完了.
当然在关闭地图界面注意释放内存.
#pragma mark - clear mapview
- (void)clearMapView {
self.mapView.showsUserLocation = NO;
[self.mapView removeAnnotations:self.mapView.annotations];
[self.mapView removeOverlays:self.mapView.overlays];
self.mapView.delegate = nil;
}
demo github地址:BYTrackDemo
demo中提供的方法,自己也可以将圆形覆盖物和地理围栏相结合,在记录行程过程中,可以判断有没有经过某个点的多少范围(半径)内.
demo编译不通过,运行不了的话,可以将BYMapViewVC这个类,放到自己的已经配置好高德地图的项目进行测试.
使用百度地图的话,有个更好的选择百度鹰眼.如果想自己写的话,就把高德的协议改成百度的,类也改成百度的就好了.
只不过记录行程轨迹就得打开后台持续定位,比较耗电,这点比较烦.
好了,以上就是分享的iOS记录地图轨迹.感觉不错的可以点个喜欢,哈哈.
有什么不足的地方还请大家指出.谢谢~
更新:
在定位的方法中可以主动筛选一些距离相近的点.比如当前点和之前的点相差距离小于10米那么就不将这个点计入画线数组.如下:
//当位置改变时候调用
- (void)mapView:(MAMapView *)mapView didUpdateUserLocation:(MAUserLocation *)userLocation updatingLocation:(BOOL)updatingLocation {
//updatingLocation 标示是否是location数据更新, YES:location数据更新 NO:heading数据更新
if (updatingLocation == YES) {
// self.currentUL = userLocation;//设置当前位置
// //手机位置信息
// [self setPointArrWithCurrentUserLocation];
//增加距离判断
if (self.currentUL) {
CLLocationDistance distance = [userLocation.location distanceFromLocation:self.currentUL.location];
//判断当前点与之前点距离相差小于10米就不计入计算.
if (distance < 10) {
return;
} else {
self.currentUL = userLocation;//设置当前位置
}
} else {
self.currentUL = userLocation;//设置当前位置
}
//手机位置信息
[self setPointArrWithCurrentUserLocation];
}
}
