导航

#pragma mark -  [MKMapItem openMapsWithItems:<#(nonnull NSArray<MKMapItem *> *)#> launchOptions:<#(nullable NSDictionary<NSString *,id> *)#>]
//开始导航
- (IBAction)beginNav:(id)sender {
    
    //导航:必须告诉苹果导航的起点和终点
    //导航是向苹果请求数据
    
    //地理编码获取地标北京
    if(self.addressTextField.text.length == 0)return;
    //根据地理编码获取地标
    CLGeocoder *geocoder = [[CLGeocoder alloc] init];
    [geocoder geocodeAddressString:self.addressTextField.text completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {
        if(error){
            NSLog(@"%@",error);
            return ;
        }
        //1.获取地标
        CLPlacemark *placemark = [placemarks firstObject];
        //2.转换类型
        MKPlacemark *mkPlaceMark = [[MKPlacemark alloc] initWithPlacemark:placemark];
        //3.用户目的地
        MKMapItem *mapItem = [[MKMapItem alloc] initWithPlacemark:mkPlaceMark];
        //4.用户的起点
        MKMapItem *currentItem = [MKMapItem mapItemForCurrentLocation];
        
        /*
         MKLaunchOptionsDirectionsModeKey 导航模式
         MKLaunchOptionsMapTypeKey 地图类型
         MKLaunchOptionsShowsTrafficKey 是否显示实时交通
         */
        //配置导航信息
        NSMutableDictionary *options = [NSMutableDictionary dictionary];
        /*
         MKLaunchOptionsDirectionsModeDefault
         MKLaunchOptionsDirectionsModeDriving 驾车模式
         MKLaunchOptionsDirectionsModeWalking 步行模式
         MKLaunchOptionsDirectionsModeTransit 公交模式
         */
        options[MKLaunchOptionsDirectionsModeKey] = MKLaunchOptionsDirectionsModeTransit;
        //标准模式
        options[MKLaunchOptionsMapTypeKey] = MKMapTypeStandard;
        options[MKLaunchOptionsShowsTrafficKey] = @(YES);
        //5.开始导航
        [MKMapItem openMapsWithItems:@[currentItem,mapItem] launchOptions:options];
    }];
}

导航画线

#pragma mark - [directions calculateDirectionsWithCompletionHandler:<#^(MKDirectionsResponse * _Nullable response, NSError * _Nullable error)completionHandler#>]
//画线
- (IBAction)beginNav:(id)sender {
    //1.地理编码获取地标
    CLGeocoder *geocoder = [[CLGeocoder alloc] init];
    if(self.addressTextField.text.length == 0) return;
    [geocoder geocodeAddressString:self.addressTextField.text completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error){
        if(error){
            NSLog(@"%@",error);
            return ;
        }
        //1.1获取地标
        CLPlacemark *placemark = [placemarks firstObject];
        //2.转换类型
        MKPlacemark *mkPlacemark = [[MKPlacemark alloc] initWithPlacemark:placemark];
        //3.获取目的地的mapItem
        MKMapItem *mapItem = [[MKMapItem alloc] initWithPlacemark:mkPlacemark];
        
        //4.获取起点的mapItem
        MKMapItem *currentMapItem = [MKMapItem mapItemForCurrentLocation];
        //5.创建请求对象
        MKDirectionsRequest *request = [[MKDirectionsRequest alloc] init];
        //目的地
        request.destination = mapItem;
        //起点
        request.source = currentMapItem;
        //6.创建方向对象
        MKDirections *directions = [[MKDirections alloc] initWithRequest:request];
        //6.1向苹果请求数据,获取路线
        [directions calculateDirectionsWithCompletionHandler:^(MKDirectionsResponse * _Nullable response, NSError * _Nullable error) {
            if(error){
                NSLog(@"%@",error);
                return ;
            }
            //遍历数组,获取所有折线
            for (MKRoute *route in response.routes) {
                //获取折线
                MKPolyline *polyline = route.polyline;
                //将折线添加到地图上
                [self.mapVIew addOverlay:polyline];
            }
        }];
    }];
    
}

#pragma mark - MKMapViewDelegate 渲染颜色(线条)
//当有覆盖物添加到地图上时调用
//overlay:即将添加到地图上的覆盖物
-(MKOverlayRenderer *)mapView:(MKMapView *)mapView rendererForOverlay:(id<MKOverlay>)overlay{
    //创建渲染对象
    MKPolylineRenderer *renderer = [[MKPolylineRenderer alloc] initWithPolyline:overlay];
    //设置颜色
    renderer.strokeColor = [UIColor redColor];
    //设置线宽
    renderer.lineWidth = 1;
    
    //返回渲染对象
    return renderer;
}