IOS定位操作
IOS定位操作
簡介
在IOS中透過CoreLocation定位,可以取得到使用者目前位置,同時能得到裝置移動資訊。
實例步驟
1、建立一個簡單的View based application(視圖應用程式)。
2、擇項目文件,然後選擇目標,然後加入CoreLocation.framework,如下所示
#3、在ViewController.xib中加入兩個標籤,建立ibOutlet名為latitudeLabel和longtitudeLabel的標籤
4、現在透過選擇" File-> New -> File... -> "選擇Objective C class 並點擊下一步
5、把"sub class of"當作NSObject,將類別命名為LocationHandler
#6、選擇建立
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
輸出
當我們執行該應用程序,會得到如下的輸出: