iOS學習之Map,定位，標記位置的使用

文章目錄

• 選擇項目，TARGETS ,點加號，添加兩個framework

iOS上使用地圖比Android要方便，只需要建立一個MKMapView,addSubView即可。這次要實現的效果如下：

有標註（圖釘），定位，地圖。

1、添加地圖

1.1 新一個Single View app ，選擇預設項，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？比如定位回來偉大的祖國首都？

這裡map.mapType =MKMapTypeSatellite;我用到是衛星地圖，可以使用標準的地圖，

map.mapType =MKMapTypeStandard;

注意，如果此時你編譯有錯誤，請拉到部落格最後查看 ：5、 遇到的問題

2、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，就我們就定位的了故宮了。

3、添加標註圖釘

3.1 建立一個標註類：CustomAnnotation

按Command+N，繼承NSObject。在CustomAnnotation.h 和CustomAnnotation.m檔案添加如下代碼：

#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 使用圖釘，

建立個方法添加圖釘的

-(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];

這樣我們就把圖釘定位在故宮了

4、定位到當前位置並擷取當前經緯度

前面我們已經添加了locationManager，現在在DidViewLoad裡直接調用

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，允許擷取當前位置，列印log

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

如果不允許：列印出錯誤記錄檔

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。

5、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)

這是為什麼呢？沒有添加對應的FrameWork。我使用的是4.3.2版本的XCode，添加方法如下：

選擇項目，TARGETS ,點加號，添加兩個framework

就好了。

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，開啟類比：

這樣就能發送類比的當前位置了。

例子代碼：http://download.csdn.net/detail/totogo2010/4400001點擊開啟連結

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

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