mapView显示IO中的特定位置和注释

Question

我想创建一个mapView，它显示一个确切的位置（坐标：纬度45.733333°和经度9.133333°），添加一个带标题和副标题的简单注释。 ma必须是静态的，不需要拥有当前用户位置或其他任何内容。

我在一个选项卡式应用程序中的简单视图控制器中添加了地图查看器。 我有我的MapViewController文件，我将它们（我猜）连接到我的ViewController，但我似乎无法找到一个教程来做我需要的东西，其他都非常复杂，我认为它们做了很多更多我的实际操作需要，而且我是初学者，所以我遇到了一些麻烦。

谢谢！

Answer 1

试试这个：

    CLLocationCoordinate2D coord;
    coord.latitude = 45.733333;
    coord.longitude = 9.133333;

    MKAnnotation *ann = [[MKAnnotation alloc] initWithLocation:coord];
    [ann setTitle:@"Title"];
    [ann setSubtitle:@"Subtitle"];
    [map addAnnotation:ann];

不要忘记将变量更改为变量名称。

修改

解决方案：

创建一个AddressAnnotation类并粘贴此代码：

AddressAnnotation.h

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

@interface AddressAnnotation : NSObject <MKAnnotation> {
    CLLocationCoordinate2D _coordinate;
    NSString *_title;
}

@property (nonatomic, retain) NSString *title;

-(id)initWithCoordinate:(CLLocationCoordinate2D)c;

@end

AddressAnnotation.m

#import "AddressAnnotation.h"

@implementation AddressAnnotation

- (NSString *)subtitle{
    return nil;
}

- (NSString *)title{
    return _title;
}

- (CLLocationCoordinate2D)coordinate{
    return _coordinate;
}

-(id)initWithCoordinate:(CLLocationCoordinate2D)c{
    _coordinate = c;
    return self;
}

@end

现在，这是一个处理地图并创建注释的类：

MapViewController.h

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

@interface MapViewController : UIViewController

@property (nonatomic, retain) IBOutlet MKMapView *mapView;

- (IBAction)changeMapType:(UISegmentedControl *)control;

@end

MapViewController.m

#import "MapViewController.h"
#import "AddressAnnotation.h"

@interface MapViewController ()

@end

@implementation MapViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.

    CLLocationCoordinate2D  location;
    location.latitude = -15.830731; // change to your coordinate latitude
    location.longitude = -47.8753; // change to your coordinate longitude

    AddressAnnotation *addAnnotation = [[AddressAnnotation alloc] initWithCoordinate:location];
    addAnnotation.title = [NSString stringWithFormat:@"Title for you annotation"];

    MKCoordinateRegion region;
    MKCoordinateSpan span;
    span.latitudeDelta = 0.002;     // 0.0 is min value u van provide for zooming
    span.longitudeDelta= 0.002;

    region.span=span;
    region.center =location;     // to locate to the center
    [_mapView addAnnotation:addAnnotation];
    [_mapView setRegion:region animated:TRUE];
    [_mapView regionThatFits:region];

}

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

@end

Answer 2

2020解决方案...

““我想创建一个显示简单位置的mapView，以显示确切位置（坐标：纬度45.733333°和经度9.133333°...

所以...

@IBOutlet var map: MKMapView!

func demoMap() {
    var c = CLLocationCoordinate2D()
    c.latitude = 45.733333
    c.longitude = 9.133333
    
    let a = MKPointAnnotation()
    a.coordinate = c
    a.title = "Steve"
    map.addAnnotation(a)
}

只需在情节提要中添加MKMapView。使用约束，像其他任何视图一样定位/调整大小。将IBOutlet链接拖到“地图”。