// ViewController.m

import <MapKit/MapKit.h>

import "YYAnnotation.h"

@interface ViewController ()<MKMapViewDelegate>

@property(strong,nonatomic)MKMapItem *mapItem;

//编码工具
@property(strong,nonatomic)CLGeocoder *geocoder;

@property(weak,nonatomic)MKMapView *mapView;

//用于发送请求给服务器
@property(strong,nonatomic)MKDirections *direct;

@end

@implementation ViewController

• (void)viewDidLoad {
  [super viewDidLoad];
  // 添加一个地图到界面上
  MKMapView *mapView = [[MKMapView alloc]initWithFrame:self.view.bounds];
  [self.view addSubview:mapView];
  mapView.delegate = self;
  self.mapView = mapView;

// 添加一个视图

//   提供两个点，自动规划线路
_geocoder = [[CLGeocoder alloc]init];

[_geocoder geocodeAddressString:@"滑县" completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {
    
    
    MKPlacemark *placemark = [[MKPlacemark alloc]initWithPlacemark:placemarks.lastObject];
    //intrItem可以理解为地图上的一个点
    MKMapItem *intrItem = [[MKMapItem alloc]initWithPlacemark:placemark];

// 添加一个小别针到地图上
YYAnnotation *anno = [[YYAnnotation alloc]init];
anno.coordinate = intrItem.placemark.location.coordinate;
[self.mapView addAnnotation:anno];

    // 让地图跳转到起点所在的区域
    MKCoordinateRegion region = MKCoordinateRegionMake(intrItem.placemark.location.coordinate, MKCoordinateSpanMake(0.1, 0.1));
    [self.mapView setRegion:region];
    
    //创建终点
    [_geocoder geocodeAddressString:@"西二旗" completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {
    
        //destItem可以理解为地图上的一个点
        MKMapItem *destItem = [[MKMapItem alloc]initWithPlacemark:[[MKPlacemark alloc]initWithPlacemark:[placemarks lastObject]]];
        
        
        //        添加一个小别针到地图上
        YYAnnotation *anno = [[YYAnnotation alloc]init];
        anno.coordinate = destItem.placemark.location.coordinate;
        [self.mapView addAnnotation:anno];
        
        //调用下面方法发送请求
        [self moveWith:intrItem toDestination:destItem];
    }];
}];

}

//提供两个点，在地图上进行规划的方法
-(void)moveWith:(MKMapItem *)formPlce toDestination:(MKMapItem *)endPlace{

// 创建请求体
// 创建请求体 (起点与终点)
MKDirectionsRequest *request = [[MKDirectionsRequest alloc] init];

request.source = formPlce;
request.destination = endPlace;

self.direct = [[MKDirections alloc]initWithRequest:request];

// 计算路线规划信息 (向服务器发请求)
[self.direct calculateDirectionsWithCompletionHandler:^(MKDirectionsResponse * _Nullable response, NSError * _Nullable error) {
    
    //获取到所有路线
    NSArray <MKRoute *> *routesArray = response.routes;
    //取出最后一条路线
    MKRoute *rute = routesArray.lastObject;
    
    //路线中的每一步
    NSArray <MKRouteStep *>*stepsArray = rute.steps;
    
    //遍历
    for (MKRouteStep *step in stepsArray) {
        
        [self.mapView addOverlay:step.polyline];
    }
    // 收响应结果 MKDirectionsResponse
    // MKRoute 表示的一条完整的路线信息 (从起点到终点) (包含多个步骤)
}];

}

// 返回指定的遮盖模型所对应的遮盖视图, renderer-渲染

• (MKOverlayRenderer *)mapView:(MKMapView *)mapView rendererForOverlay:(id<MKOverlay>)overlay
  {
  // 判断类型
  if ([overlay isKindOfClass:[MKPolyline class]]) {
  // 针对线段, 系统有提供好的遮盖视图
  MKPolylineRenderer *render = [[MKPolylineRenderer alloc] initWithPolyline:overlay];

    // 配置，遮盖线的颜色
    render.lineWidth = 5;
    render.strokeColor =  [UIColor colorWithRed:arc4random_uniform(256) / 255.0 green:arc4random_uniform(256) / 255.0 blue:arc4random_uniform(256) / 255.0 alpha:1.0];
    
    return render;
  

  }
  // 返回nil, 是没有默认效果
  return nil;
  }

//跳转页面.h

import <MapKit/MapKit.h>

import <CoreLocation/CoreLocation.h>

@interface YYAnnotation : NSObject<MKAnnotation>

@property(assign,nonatomic)CLLocationCoordinate2D coordinate;