iOS学习之Map,定位,标记位置的使用

iOS上使用地图比Android要方便,只需要新建一个MKMapView,addSubView即可。这次要实现的效果如下:

有标注(大头针),定位,地图。

1、添加地图

1.1 新一个Single View app ,选择默认项,创建后,在ViewController.h 

 

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

@interface ViewController : UIViewController 
<MKMapViewDelegate, CLLocationManagerDelegate> {
    MKMapView *map;
    CLLocationManager *locationManager;
}
@end

1.2在ViewController.m中添加

- (void)viewDidLoad
{
    map = [[MKMapView alloc] initWithFrame:[self.view bounds]];
    map.showsUserLocation = YES;
    map.mapType = MKMapTypeSatellite;
    [self.view addSubview:map];


    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

运行:

 

OMG,看到的是世界地图。怎么定位到指定的位置呢?比如定位回来伟大的祖国首都?

这里map.mapType =MKMapTypeSatellite;我用到是卫星地图,可以使用标准的地图,

map.mapType =MKMapTypeStandard;


注意,如果此时你编译有错误,请拉到博客最后查看 :5、 遇到的问题

2、定位到指定经纬度

CLLocationCoordinate2D coords = CLLocationCoordinate2DMake(39.915352,116.397105);
    
    float zoomLevel = 0.02;
    MKCoordinateRegion region = MKCoordinateRegionMake(coords, MKCoordinateSpanMake(zoomLevel, zoomLevel));
    [map setRegion:[map regionThatFits:region] animated:YES];
        

这样,就我们就定位的了故宫了。

 

3、添加标注大头针

3.1 新建一个标注类:CustomAnnotation

按Command+N,继承NSObject。在CustomAnnotation.h 和CustomAnnotation.m文件添加如下代码:

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

@interface CustomAnnotation : NSObject 
<MKAnnotation>
{
    CLLocationCoordinate2D coordinate;
    NSString *title;
    NSString *subtitle;
}
-(id) initWithCoordinate:(CLLocationCoordinate2D) coords;

@property (nonatomic, readonly) CLLocationCoordinate2D coordinate;
@property (nonatomic, retain) NSString *title;
@property (nonatomic, retain) NSString *subtitle;

@end

3.1 使用大头针,

 

新建个方法添加大头针的

-(void)createAnnotationWithCoords:(CLLocationCoordinate2D) coords {
    CustomAnnotation *annotation = [[CustomAnnotation alloc] initWithCoordinate: 
                                    coords];
    annotation.title = @"标题";
    annotation.subtitle = @"子标题";
    [map addAnnotation:annotation];
}

调用

CLLocationCoordinate2D coords = CLLocationCoordinate2DMake(39.915352,116.397105);
    
    float zoomLevel = 0.02;
    MKCoordinateRegion region = MKCoordinateRegionMake(coords, MKCoordinateSpanMake(zoomLevel, zoomLevel));
    [map setRegion:[map regionThatFits:region] animated:YES];

    
    [self createAnnotationWithCoords:coords];

这样我们就把大头针定位在故宫了

 



4、定位到当前位置并获取当前经纬度

前面我们已经添加了locationManager,现在在DidViewLoad里直接调用

locationManager = [[CLLocationManager alloc] init];
    locationManager.delegate = self;
    [locationManager startUpdatingLocation];

实现协议方法收到定位成功后的经纬度

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
    [locationManager stopUpdatingLocation];
    
    NSString *strLat = [NSString stringWithFormat:@"%.4f",newLocation.coordinate.latitude];
    NSString *strLng = [NSString stringWithFormat:@"%.4f",newLocation.coordinate.longitude];
    NSLog(@"Lat: %@  Lng: %@", strLat, strLng);

}

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
    NSLog(@"locError:%@", error);

}

 

运行,允许获取当前位置,打印log

2012-06-28 23:58:32.237 MapDemo[8202:11603] Lat: 39.9011  Lng: 116.3000

如果不允许:打印出错误日志

2012-06-28 23:25:03.109 MapDemo[7531:11603] locError:Error Domain=kCLErrorDomain Code=1 "The operation couldn’t be completed. (kCLErrorDomain error 1.)"

定位后,移动到当前位置:

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
    [locationManager stopUpdatingLocation];
    
    NSString *strLat = [NSString stringWithFormat:@"%.4f",newLocation.coordinate.latitude];
    NSString *strLng = [NSString stringWithFormat:@"%.4f",newLocation.coordinate.longitude];
    NSLog(@"Lat: %@  Lng: %@", strLat, strLng);
    
    CLLocationCoordinate2D coords = CLLocationCoordinate2DMake(newLocation.coordinate.latitude,newLocation.coordinate.longitude);
    float zoomLevel = 0.02;
    MKCoordinateRegion region = MKCoordinateRegionMake(coords,MKCoordinateSpanMake(zoomLevel, zoomLevel));
    [map setRegion:[map regionThatFits:region] animated:YES];
}


 

定位到了当前位置。

5、会遇到的问题:

运行是发现了编译错误:

Undefined symbols for architecture i386:

  "_CLLocationCoordinate2DMake", referenced from:

      -[ViewController viewDidLoad] in ViewController.o

      -[ViewController locationManager:didUpdateToLocation:fromLocation:] in ViewController.o

  "_OBJC_CLASS_$_MKMapView", referenced from:

      objc-class-ref in ViewController.o

  "_OBJC_CLASS_$_CLLocationManager", referenced from:

      objc-class-ref in ViewController.o

ld: symbol(s) not found for architecture i386

clang: error: linker command failed with exit code 1 (use -v to see invocation)

这是为什么呢?没有添加对应的FrameWork。我使用的是4.3.2版本的XCode,添加方法如下:

选择项目,TARGETS ,点加号,添加两个framework

就好了。

如何发送IOS模拟器经纬度?

5.0以上的模拟器才能用这个功能,打开模拟:

这样就能发送模拟的当前位置了。

 

 

例子代码:http://download.csdn.net/detail/totogo2010/4400001点击打开链接

https://github.com/schelling/YcDemo/tree/master/MapDemo

 

著作权声明:本文由http://blog.csdn.net/totogo2010/原创,欢迎转载分享。请尊重作者劳动,转载时保留该声明和作者博客链接,谢谢!

 

 

郑重声明:本站内容如果来自互联网及其他传播媒体,其版权均属原媒体及文章作者所有。转载目的在于传递更多信息及用于网络分享,并不代表本站赞同其观点和对其真实性负责,也不构成任何其他建议。