如何在mapkit目标c上放置位置图标

Question

我是目标c的新手。我创建了一个由mapView

组成的项目

在ny项目的ViewController.h中，

#import <UIKit/UIKit.h>
#import "MapKit/MapKit.h"

@interface ViewController : UIViewController
@property (weak, nonatomic) IBOutlet MKMapView *mapView;

@end

在ViewController.m文件中，我有viewDidLoad

- (void)viewDidLoad {
    [super viewDidLoad];
         mapView.showsUserLocation=YES;
    // Do any additional setup after loading the view, typically from a nib.
}

我想在代码中给出多个位置的坐标，我想在地图上显示与这些坐标对应的loc.png图标。我该如何完成这项任务？以及如何将地图缩放到最大比例？ 通过此链接，您可以下载我的示例项目：https://drive.google.com/file/d/0B5pNDpbvZ8SnZGZnU1ZfbjZMRWs/view?usp=sharing

Answer 1

我已经处理了您的问题，这是我的结果，使用此代码，现在我使用实现MKAnnotation协议的自定义类

已编辑

<强> Place.h

#import <Foundation/Foundation.h>
#import <MapKit/MapKit.h>

@interface Place : NSObject<MKAnnotation>

@property (nonatomic) CLLocationCoordinate2D coordinate;

// Title and subtitle for use by selection UI.
@property (nonatomic, nullable) NSString *title;
@property (nonatomic, nullable) NSString *subtitle;

-(id)initWithCoordinates:(CLLocationCoordinate2D) coordinates andName:(NSString*)name;

@end

<强> Place.m

#import "Place.h"


@implementation Place
@synthesize coordinate,title,subtitle;

-(id)initWithCoordinates:(CLLocationCoordinate2D) coordinates andName:(NSString*)name
{
    self = [super init];
    if(self)
    {
        [self setTitle:name];
        [self setCoordinate:coordinates];
    }
    return self;
}

@end

修改后的代码

#import "ViewController.h"
#import "Place.h"

@interface ViewController () <MKMapViewDelegate>
@property NSMutableArray * arrayOfLocations;
@end

@implementation ViewController 
@synthesize mapView;


- (void)viewDidLoad {
    [super viewDidLoad];
         mapView.showsUserLocation=YES;

        self.arrayOfLocations = [NSMutableArray arrayWithObjects:[[Place alloc] initWithCoordinates:CLLocationCoordinate2DMake(40.416691, -3.700345) andName:@"MADRID"],
                         [[Place alloc] initWithCoordinates:CLLocationCoordinate2DMake(35.416691, -3.700345) andName:@"SOMEWARE IN THE MAP"],
                         [[Place alloc] initWithCoordinates:CLLocationCoordinate2DMake(35.416691, -40.700345) andName:@"SOMEWARE IN THE MAP1"],
                         [[Place alloc] initWithCoordinates:CLLocationCoordinate2DMake(20.416691, -50.700345) andName:@"SOMEWARE IN THE MAP2"], nil];

    [self.mapView setDelegate:self];

    [self.mapView addAnnotations:self.arrayOfLocations];
    // Do any additional setup after loading the view, typically from a nib.
}


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

- (nullable MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
    MKAnnotationView * annotationView = [mapView dequeueReusableAnnotationViewWithIdentifier:@"testAnnotationView"];
    if(annotationView == nil){
        annotationView = [[MKAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:@"testAnnotationView"];
        annotationView.image = [UIImage imageNamed:@"loc.png"];
        annotationView.canShowCallout = true;
    }

    return annotationView;
}

@end

希望这会对你有所帮助，

这就是它的外观