導(dǎo)入MapKit框架和設(shè)置屬性

#import "ViewController.h"
#import <MapKit/MapKit.h>
@interface ViewController ()
@property (weak, nonatomic) IBOutlet MKMapView *mapView;
@property (weak, nonatomic) IBOutlet UITextField *addressTF;

@end

在文本輸入框輸入地址并點(diǎn)擊搜索按鈕,這個(gè)會(huì)調(diào)用系統(tǒng)自帶的地圖進(jìn)行搜索

- (IBAction)beginNav:(id)sender
{
    // 起始點(diǎn)   終點(diǎn) -->向蘋果請(qǐng)求數(shù)據(jù)
    // 1.地理編碼 -->獲取終點(diǎn)的CLPlacemark
    CLGeocoder *geocoder = [[CLGeocoder alloc] init];
    [geocoder geocodeAddressString:self.addressTF.text completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {
        if (error) {
            NSLog(@"%@",error);
            return ;
        }
        // 2.獲取終點(diǎn)的CLPlacemark
        CLPlacemark *placemark = placemarks[0];
        
        // 3.轉(zhuǎn)換類型
        MKPlacemark *mkPlacemark = [[MKPlacemark alloc] initWithPlacemark:placemark];
        // 4.獲取終點(diǎn)的item
        MKMapItem *mapItem = [[MKMapItem alloc] initWithPlacemark:mkPlacemark];
        
        // 5.獲取起始點(diǎn)的item
        MKMapItem *currentMapItem = [MKMapItem mapItemForCurrentLocation];
        
        /*
         MKLaunchOptionsDirectionsModeKey
         MKLaunchOptionsMapTypeKey
         MKLaunchOptionsShowsTrafficKey
         */
        NSMutableDictionary *options = [NSMutableDictionary dictionary];
        /*
         MKLaunchOptionsDirectionsModeDriving 駕車
         MKLaunchOptionsDirectionsModeWalking 步行
         MKLaunchOptionsDirectionsModeTransit 公共交通
         */
        // 導(dǎo)航模式
        options[MKLaunchOptionsDirectionsModeKey] = MKLaunchOptionsDirectionsModeDriving;
        // 地圖類型
        options[MKLaunchOptionsMapTypeKey] = MKMapTypeStandard;
        // 是否顯示交通狀況
        options[MKLaunchOptionsShowsTrafficKey] = @(YES);
        // 6.打開系統(tǒng)自帶的地圖去導(dǎo)航
        [MKMapItem openMapsWithItems:@[currentMapItem,mapItem] launchOptions:options];
    }];
}

導(dǎo)航劃線

#import "ViewController.h"
#import <MapKit/MapKit.h>
@interface ViewController ()<MKMapViewDelegate>
@property (weak, nonatomic) IBOutlet MKMapView *mapView;
@property (weak, nonatomic) IBOutlet UITextField *addressTF;
@property (nonatomic, strong) CLLocationManager *locationManager;
@end

創(chuàng)建對(duì)象請(qǐng)求授權(quán)以及設(shè)置代理

- (void)viewDidLoad {
    [super viewDidLoad];
    // 創(chuàng)建對(duì)象并請(qǐng)求授權(quán)
    self.locationManager = [[CLLocationManager alloc] init];
    [self.locationManager requestWhenInUseAuthorization];
    // 設(shè)置代理
    self.mapView.delegate = self;
}

開始劃線

// 1.地理編碼  -->獲取終點(diǎn)的mapItem
    CLGeocoder *geocoder = [[CLGeocoder alloc] init];
    [geocoder geocodeAddressString:self.addressTF.text completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {
        if (error) {
            NSLog(@"%@",error);
            return ;
        }
        // 獲取地標(biāo)
        CLPlacemark *placemark = placemarks[0];
        // 轉(zhuǎn)換類型
        MKPlacemark *mkPlacemark = [[MKPlacemark alloc] initWithPlacemark:placemark];
        // 2.終點(diǎn)的mapItem
        MKMapItem *mapItem = [[MKMapItem alloc] initWithPlacemark:mkPlacemark];
        // 3.起點(diǎn)的mapItem
        MKMapItem *currentMapItem = [MKMapItem mapItemForCurrentLocation];
        
        //direction :方向
        // 4.請(qǐng)求數(shù)據(jù)
        // 創(chuàng)建方向請(qǐng)求
        MKDirectionsRequest *request = [[MKDirectionsRequest alloc] init];
        // 終點(diǎn)
        request.destination = mapItem;
        // 起點(diǎn)
        request.source = currentMapItem;
        // 創(chuàng)建方向?qū)ο?        MKDirections *directions = [[MKDirections alloc] initWithRequest:request];
        // 請(qǐng)求數(shù)據(jù)
        [directions calculateDirectionsWithCompletionHandler:^(MKDirectionsResponse * _Nullable response, NSError * _Nullable error) {
            if (error) {
                NSLog(@"error:%@",error);
                return ;
            }
            // polyline:折線
            // 5.獲取數(shù)據(jù)
            for (MKRoute *route in response.routes) {
                // 獲取折線
                MKPolyline *polyline = route.polyline;
                // 6.添加到地圖上
                [self.mapView addOverlay:polyline];
            }
        }];
    }];

當(dāng)有覆蓋物添加到地圖上時(shí)調(diào)用
overlay :添加的覆蓋物

- (MKOverlayRenderer *)mapView:(MKMapView *)mapView rendererForOverlay:(id<MKOverlay>)overlay
{
    // 創(chuàng)建渲染對(duì)象
    MKPolylineRenderer *renderer = [[MKPolylineRenderer alloc] initWithPolyline:overlay];
    // 設(shè)置顏色
    renderer.strokeColor = [UIColor redColor];
    return renderer;
}