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

[cpp] view
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#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

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- (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

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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：

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#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

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#import "CustomAnnotation.h"

@implementation CustomAnnotation

@synthesize coordinate, title, subtitle;

-(id) initWithCoordinate:(CLLocationCoordinate2D) coords

{

if (self = [super init]) {

coordinate = coords;

}

return self;

}

@end

3.1 使用大头针，

新建个方法添加大头针的

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-(void)createAnnotationWithCoords:(CLLocationCoordinate2D) coords {

CustomAnnotation *annotation = [[CustomAnnotation alloc] initWithCoordinate:

coords];

annotation.title = @"标题";

annotation.subtitle = @"子标题";

[map addAnnotation:annotation];

}

调用

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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

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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

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- (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

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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

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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：

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- (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
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