Map,定位，標記位置的使用

IOS上使用地圖比Android要方便，只須要新建一個MKMapView,addSubView便可。此次要實現的效果以下：

有標註（大頭針），定位，地圖。

 

一、添加地圖

1.1 新一個Single View app ，選擇默認項，建立後，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.
}

運行：

OMG,看到的是世界地圖。怎麼定位到指定的位置呢？好比定位回來偉大的祖國首都？

這裏map.mapType =MKMapTypeSatellite;我用到是衛星地圖，可使用標準的地圖，

map.mapType =MKMapTypeStandard;

注意，若是此時你編譯有錯誤，請拉到博客最後查看 ：五、 遇到的問題

二、定位到指定經緯度

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];

這樣，就咱們就定位的了故宮了。

三、添加標註大頭針

3.1 新建一個標註類：CustomAnnotation

按Command+N，繼承NSObject。在CustomAnnotation.h 和CustomAnnotation.m文件添加以下代碼：

#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

#import "CustomAnnotation.h"

@implementation CustomAnnotation
@synthesize coordinate, title, subtitle;

-(id) initWithCoordinate:(CLLocationCoordinate2D) coords
{
    if (self = [super init]) {
        coordinate = coords;
    }
    return self;
}
@end

3.1 使用大頭針，

新建個方法添加大頭針的

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

調用

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];

這樣咱們就把大頭針定位在故宮了

四、定位到當前位置並獲取當前經緯度

前面咱們已經添加了locationManager，如今在DidViewLoad裏直接調用

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

 

實現協議方法收到定位成功後的經緯度

- (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);

}

運行，容許獲取當前位置，打印log

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

若是不容許：打印出錯誤日誌

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.)"

定位後，移動到當前位置：

- (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];
}

定位到了當前位置。

五、會遇到的問題：

運行是發現了編譯錯誤：

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)

這是爲何呢？沒有添加對應的FrameWork。我使用的是4.3.2版本的XCode，添加方法以下：

選擇項目，TARGETS ,點加號，添加兩個framework

就行了。

如何發送IOS模擬器經緯度？

5.0以上的模擬器才能用這個功能，打開模擬：

這樣就能發送模擬的當前位置了。

 

 

例子代碼：http://download.csdn.net/detail/totogo2010/4400001點擊打開連接

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