在IOS中通過CoreLocation定位,可以獲取到用戶當前位置,同時能得到裝置移動信息。
1、創建一個簡單的View based application(視圖應用程序)。
2、擇項目文件,然後選擇目標,然後添加CoreLocation.framework,如下所示
3、在ViewController.xib中添加兩個標簽,創建ibOutlet名為latitudeLabel和longtitudeLabel的標簽
4、現在通過選擇" File-> New -> File... -> "選擇Objective C class 並單擊下一步
5、把"sub class of"作為NSObject,將類命名為LocationHandler
6、選擇創建
7、更新LocationHandler.h,如下所示
#import <Foundation/Foundation.h> #import <CoreLocation/CoreLocation.h> @protocol LocationHandlerDelegate <NSObject> @required -(void) didUpdateToLocation:(CLLocation*)newLocation fromLocation:(CLLocation*)oldLocation; @end @interface LocationHandler : NSObject<CLLocationManagerDelegate> { CLLocationManager *locationManager; } @property(nonatomic,strong) id<LocationHandlerDelegate> delegate; +(id)getSharedInstance; -(void)startUpdating; -(void) stopUpdating; @end
8、更新LocationHandler.m,如下所示
#import "LocationHandler.h" static LocationHandler *DefaultManager = nil; @interface LocationHandler() -(void)initiate; @end @implementation LocationHandler +(id)getSharedInstance{ if (!DefaultManager) { DefaultManager = [[self allocWithZone:NULL]init]; [DefaultManager initiate]; } return DefaultManager; } -(void)initiate{ locationManager = [[CLLocationManager alloc]init]; locationManager.delegate = self; } -(void)startUpdating{ [locationManager startUpdatingLocation]; } -(void) stopUpdating{ [locationManager stopUpdatingLocation]; } -(void)locationManager:(CLLocationManager *)manager didUpdateToLocation: (CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation{ if ([self.delegate respondsToSelector:@selector (didUpdateToLocation:fromLocation:)]) { [self.delegate didUpdateToLocation:oldLocation fromLocation:newLocation]; } } @end
9、更新ViewController.h,如下所示
#import <UIKit/UIKit.h> #import "LocationHandler.h" @interface ViewController : UIViewController<LocationHandlerDelegate> { IBOutlet UILabel *latitudeLabel; IBOutlet UILabel *longitudeLabel; } @end
10、更新ViewController.m,如下所示
#import "ViewController.h" @interface ViewController () @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; [[LocationHandler getSharedInstance]setDelegate:self]; [[LocationHandler getSharedInstance]startUpdating]; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } -(void)didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation{ [latitudeLabel setText:[NSString stringWithFormat: @"Latitude: %f",newLocation.coordinate.latitude]]; [longitudeLabel setText:[NSString stringWithFormat: @"Longitude: %f",newLocation.coordinate.longitude]]; } @end
當我們運行該應用程序,會得到如下的輸出: