# IOS定位操作
## 简介
在IOS中通过CoreLocation定位，可以获取到用户当前位置，同时能得到装置移动信息。
### 实例步骤
1、创建一个简单的View based application（视图应用程序）。
2、择项目文件，然后选择目标，然后添加CoreLocation.framework,如下所示
3、在ViewController.xib中添加两个标签，创建ibOutlet名为latitudeLabel和longtitudeLabel的标签
4、现在通过选择" File-> New -> File... -> "选择Objective C class 并单击下一步
5、把"sub class of"作为NSObject，将类命名为LocationHandler
6、选择创建
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
```
### 输出
当我们运行该应用程序，会得到如下的输出:
