iOS_SN_地图的使用（3）

地图的定位，记得不用定位的时候要关掉定位不然会一直定位，使电量使用过快。

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    self.mapView = [[BMKMapView alloc] initWithFrame:CGRectMake(0, 0, kwidth, kheigth)];
    //    [self.mapView setZoomLevel:14];
    [self.view addSubview:self.mapView];

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

}

//实现相关delegate 处理位置信息更新
//处理方向变更信息
- (void)didUpdateUserHeading:(BMKUserLocation *)userLocation
{
    //NSLog(@"heading is %@",userLocation.heading);

    NSLog(@"%@--%@--%f--%f",userLocation.title,userLocation.subtitle,userLocation.location.altitude,userLocation.location.altitude);

}
//处理位置坐标更新
- (void)didUpdateBMKUserLocation:(BMKUserLocation *)userLocation
{

    _mapView.showsUserLocation = YES;//显示定位图层
    [_mapView updateLocationData:userLocation];

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

　　自定义大头针，要先自定义大头针模型，其核心代码如下：

- (BMKAnnotationView *)mapView:(BMKMapView *)view viewForAnnotation:(id <BMKAnnotation>)annotation
{
    static NSString *AnnotationViewID = @"annotationViewID";
    MyPointAnnotation *myAnnotation = (MyPointAnnotation *)annotation;
    MyAnnotationView *annotationView = (MyAnnotationView *)[view dequeueReusableAnnotationViewWithIdentifier:AnnotationViewID];
    if (annotationView == nil)
    {
        annotationView = [[MyAnnotationView alloc] initWithFrame:CGRectMake(0, 0, 27, 30) viewForAnnotation:myAnnotation reuseIdentifier:AnnotationViewID];
        annotationView.image = [UIImage imageNamed:@"定位.png"];
    }
    else
    {
        annotationView.myAnnotation = myAnnotation;
        [annotationView setNeedsLayout];
    }
    annotationView.annotation = myAnnotation;
    annotationView.canShowCallout = true;
    return annotationView;
}

　　下面有一个整体的demo会贴出来。