MapKit地图划线

只要用于获取用户位置都要取得用户授权

#import "ViewController.h"

#import <MapKit/MapKit.h>

@interface ViewController ()<MKMapViewDelegate>

@property(nonatomic,strong)UITextField*destination;

@property(nonatomic,strong)MKMapView*mapView;

@property(nonatomic,strong)CLLocationManager *mgr;

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

self.mgr=[[CLLocationManager alloc]init];

[self.mgr requestAlwaysAuthorization];

MKMapView *map=[[MKMapView alloc]init];

map.frame=self.view.bounds;

self.mapView=map;

[self.view addSubview:map];

self.mapView.delegate=self;

UITextField *field=[[UITextField alloc]init];

field.frame=CGRectMake(10, 20, 60, 30);

self.destination=field;

field.text=@"西安";

[self.view addSubview:field];

[self drawLine];

}

//划线

-(void)drawLine

{

[self.view endEditing:YES];

CLGeocoder *geo=[[CLGeocoder alloc]init];

[geo geocodeAddressString:self.destination.text completionHandler:^(NSArray *placemarks, NSError *error) {

if (placemarks.count==0||error) {

return ;

}

//获取目的地item 和当前的位置

CLPlacemark *pm=[placemarks firstObject];

MKPlacemark *mkp=[[MKPlacemark alloc]initWithPlacemark:pm];

MKMapItem *destinationItem=[[MKMapItem alloc]initWithPlacemark:mkp];

MKMapItem *userItem=[MKMapItem mapItemForCurrentLocation];

//1创建路线请求

MKDirectionsRequest*request=[[MKDirectionsRequest alloc]init];

//设置起点终点

request.source=userItem;

request.destination=destinationItem;

//创建路线管理器

MKDirections *direction=[[MKDirections alloc]initWithRequest:request];

//划线

[direction calculateDirectionsWithCompletionHandler:^(MKDirectionsResponse *response, NSError *error) {

for (MKRoute*route in response.routes) {

//拿到线

MKPolyline *line=route.polyline;

//添加到地图

[self.mapView addOverlay:line];

}

}];

}];

}

-(MKOverlayRenderer*)mapView:(MKMapView *)mapView rendererForOverlay:(id<MKOverlay>)overlay

{

//创建渲染器

MKPolylineRenderer *render=[[MKPolylineRenderer alloc]initWithOverlay:overlay];

//设置线段的颜色

render.strokeColor=[UIColor redColor];

//设置线宽

render.lineWidth=5;

return render;

}

@end