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