只要用户允许应用程序在核心位置框架的帮助下访问信息,无涯教程就可以在iOS中轻松找到用户的当前位置。
位置处理步骤
步骤1 - 创建一个基于View的简单应用程序。
步骤2 - 选择您的项目文件,然后选择目标,然后添加CoreLocation.framework,如下所示-

步骤3 - 在 ViewController.xib 中添加两个标签,并创建ibOutlets,分别将标签命名为 latitudeLabel 和 longitudeLabel 。
步骤4 - 通过选择File→New→File...→Object C Class创建一个新文件,然后单击下一步。
步骤5 - 将类命名为 LocationHandler ,将"sub class of"作为NSObject。
步骤6 - 选择创建。
步骤7 - 如下更新 LocationHandler.h -
#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
步骤8 - 如下更新 LocationHandler.m -
#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
步骤9 - 如下更新 ViewController.h ,在其中无涯教程实现了 LocationHandler委托并创建两个ibOutlet-
#import <UIKit/UIKit.h> #import "LocationHandler.h"@interface ViewController : UIViewController<LocationHandlerDelegate> { IBOutlet UILabel latitudeLabel; IBOutlet UILabel longitudeLabel; } @end
步骤10 - 如下更新 ViewController.m -
#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
运行应用程序时,将获得以下输出-