IOS: 按名称在地图上显示多个注释

Question

在我的项目中，我必须在 MapView 上显示多个注释。我从服务器收到的响应显示纬度和经度）。有人请建议我编码如何在地图上显示多个注释，因为我将所有地址值放在 NSArray 中。我的数组在控制台中的输出如下：

数组名称：arrayforlocation

(
"[39.4835647,-119.7310213]",
"[42.5629668,-114.4608711]",
"[45.5064511,-122.7756216]",
"[40.2338438,-111.6585337]",
"[45.7832856,-108.5006904]"
)

还请建议一些代码，将此数组拆分为两个数组，以获得单独的纬度和经度值。

Answer 1

我建议，你也可以让你的网络服务开发人员发送位置（以经纬度的形式），如果他们不能，那么你可以通过 CLGeocoder (or can use some other accurate service provider like Google or a library) 请求获取经纬度信息对于您拥有的特定地址。只有在那之后，您才能在地图上显示特定地址的大头针。

例如

CLGeocoder *geocoder = [[CLGeocoder alloc] init];
[geocoder geocodeAddressString:@"Your Address String" 
    completionHandler:^(NSArray* placemarks, NSError* error){
         for (CLPlacemark* aPlacemark in placemarks)
         {
             // Process the placemark.
             NSString *latitude = [NSString stringWithFormat:@"%.4f",aPlacemark.location.coordinate.latitude];
             NSString *longitude = [NSString stringWithFormat:@"%.4f",aPlacemark.location.coordinate.longitude];
         }
}];

然后，您可以按照 this 在您的地图上显示注释。

Answer 2

这是在地图视图上添加注释的代码：

CLLocationCoordinate2D location;
MKCoordinateSpan span;
location.latitude = (double) 44.4758;
location.longitude = (double) -73.2125;
span.latitudeDelta=0.2;
span.longitudeDelta=0.2;
MapViewAnnotation *newAnnotation = [[MapViewAnnotation alloc] initWithTitle:@"BCA" andCoordinate:location];
[self.mapView addAnnotation:newAnnotation];



themapView = [[MapView alloc] initWithNibName:@"MapView" bundle:nil];
[self.view addSubview:themapView.view];

希望这对您有所帮助:)

Answer 3

我自己解决了这个问题。这是我的解决方案：首先我为纬度和经度创建单独的数组然后在 .m 文件中，我输入了以下代码

-(id)initWithCoordinate:(CLLocationCoordinate2D) c  titleee:(NSString *) t  subTitle:(NSString *)timed time:(NSString *)tim
{
    self.coordinate=c;
    self.time=tim;
    self.subTitle=timed;
    self.titleee=t;
    return self;
}

-(id)initWithCoordinate:(CLLocationCoordinate2D) c titleee:(NSString *)t
{
    self.coordinate=c;
    self.titleee=t;
    return self;
}


-(void)showaddressonmap
{
    for ( int i=0; i<[latArray count]; i++)
    {
        CLLocationCoordinate2D coord;

        coord.latitude=[[NSString stringWithFormat:@"%@",[latArray objectAtIndex:i]] floatValue];
        coord.longitude=[[NSString stringWithFormat:@"%@",
                          [longArray objectAtIndex:i]] floatValue];
        MKCoordinateRegion region1;
        region1.center=coord;
        region1.span.longitudeDelta=20 ;
        region1.span.latitudeDelta=20;
        [mapvw setRegion:region1 animated:YES];

        NSString *titleStr =[locationName objectAtIndex:i] ;
        NSLog(@"title is:%@",titleStr);

        NearestResultDiagnose *  annotObj =[[NearestResultDiagnose alloc]initWithCoordinate:coord titleee:titleStr];
        [mapvw addAnnotation:annotObj];
    }
}

然后在我的 .h 文件中放入以下代码

{
    CLLocationCoordinate2D coordinate;
    NSString *titleee;
    NSString *subTitle;
    NSString *time;


}
@property (nonatomic)CLLocationCoordinate2D coordinate;

@property (nonatomic, retain) NSString *titleee;

@property (nonatomic, retain) NSString *subTitle;

@property (nonatomic,retain) NSString *time;

-(id)initWithCoordinate:(CLLocationCoordinate2D) c  titleee:(NSString *) t  subTitle:(NSString *)timed time:(NSString *)tim;

-(id)initWithCoordinate:(CLLocationCoordinate2D) c titleee:(NSString *)t;

并综合属性

IOS: 按名称在地图上显示多个注释

IOS: Displaying multiple annotations on map by name

objective-c

mkmapview

ios