地图Mapkit 绘制路线

//
//  ViewController.m
//  MapDrawLine
//
//  Created by 谢泽锋 on 2016/10/27.
//  Copyright ? 2016年 xiezefeng. All rights reserved.
//

#import "ViewController.h"
#import <MapKit/MapKit.h>
@interface ViewController ()<MKMapViewDelegate>
@property (nonatomic, strong) MKPolyline *routeLine;
@property (nonatomic, strong) NSMutableArray *mutArray;
@property (nonatomic, strong) CLGeocoder *geocoder;
@property(nonatomic,strong)MKMapView * mapView;

@end

@implementation ViewController
- (NSMutableArray *)mutArray {
    if (_mutArray == nil) {
        _mutArray = [NSMutableArray array];
    }
    return _mutArray;
}

- (CLGeocoder *)geocoder {
    if (!_geocoder) {
        self.geocoder = [[CLGeocoder alloc] init];
    }
    return _geocoder;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    _mapView = [[MKMapView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height*2/3)];

    _mapView.delegate= self;
    CLLocation *location1 = [[CLLocation alloc] initWithLatitude:23.4 longitude:113.3];
//    CLLocation *location2 = [[CLLocation alloc] initWithLatitude:23.6 longitude:113.9];
//    CLLocation *location3 = [[CLLocation alloc] initWithLatitude:23.0 longitude:113.4];
//    CLLocation *location4 = [[CLLocation alloc] initWithLatitude:23.7 longitude:113.7];

    [self.mutArray addObject:location1];
//    [self.mutArray addObject:location2];
//    [self.mutArray addObject:location3];
//    [self.mutArray addObject:location4];

    [self.view addSubview:_mapView];

    MKCoordinateRegion region;
//    region.span = MKCoordinateSpanMake(1, 1);
    region.center = CLLocationCoordinate2DMake(location1.coordinate.latitude,location1.coordinate.longitude);
    [self.mapView setRegion:region animated:YES];

    [self drawLineWithLocationArray:self.mutArray];

    // Do any additional setup after loading the view, typically from a nib.
}
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
    double num = 0.1*(arc4random()%10);
    double num1 =0.1*(arc4random()%10);
    CLLocation *location4 = [[CLLocation alloc] initWithLatitude:23.7+num longitude:113.7+num1];
    [self.mutArray addObject:location4];

    [self drawLineWithLocationArray:self.mutArray];

}
- (IBAction)ac:(id)sender {
    [self.mutArray removeAllObjects];
    [self drawLineWithLocationArray:self.mutArray];

}

//地图画线
- (void)drawLineWithLocationArray:(NSMutableArray *)locationArray
{

    MKMapPoint* pointArray = malloc(sizeof(CLLocationCoordinate2D) * locationArray.count);

    for(int idx = 0; idx < locationArray.count; idx++)
    {
        CLLocation *location = [locationArray objectAtIndex:idx];

        CLLocationDegrees latitude  = location.coordinate.latitude;

        CLLocationDegrees longitude = location.coordinate.longitude;

        CLLocationCoordinate2D coordinate = CLLocationCoordinate2DMake(latitude, longitude);

        MKMapPoint point = MKMapPointForCoordinate(coordinate);

        pointArray[idx] = point;
    }

    if (_routeLine) {
        [_mapView removeOverlay:_routeLine];
    }

    _routeLine = [MKPolyline polylineWithPoints:pointArray count:locationArray.count];

    if (nil != _routeLine) {
        [_mapView addOverlay:_routeLine];
    }

    free(pointArray);
}

-(MKOverlayRenderer *)mapView:(MKMapView *)mapView rendererForOverlay:(id<MKOverlay>)overlay{
    MKPolylineRenderer *renderer = [[MKPolylineRenderer alloc] initWithOverlay:overlay];

    renderer.strokeColor = [UIColor blueColor];

    renderer.lineWidth = 2;

    return renderer;

}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end