iOS CoreLocation之区域监测

CoreLocation的区域监测,下图来自疯狂iOS讲义

 

1.引CoreLocation框架,导入头文件

#import <CoreLocation/CoreLocation.h>

 

2.添加定位管理为成员变量,添加延迟加载

@property (nonatomic,strong) CLLocationManager *locMgr;

 1 /**

 2  *  懒加载

 3  */

 4 - (CLLocationManager *)locMgr

 5 {

 6     if (_locMgr == nil) {

 7         _locMgr = [[CLLocationManager alloc]init];

 8         _locMgr.delegate = self;

 9     }

10     return _locMgr;

11 }

 

3.开启区域监测

 1 - (void)viewDidLoad

 2 {

 3     [super viewDidLoad];

 4 

 5     // 设置中心

 6     CLLocationCoordinate2D coordinate = CLLocationCoordinate2DMake(39, 116);

 7     // 设置半径

 8     CLLocationDistance distance = 500;

 9     // 创建监测区域

10     CLRegion *region = [[CLCircularRegion alloc]initWithCenter:coordinate radius:distance identifier:@"region"];

11     

12     // 开始区域检测

13     [self.locMgr startMonitoringForRegion:region];

14 }

 

4.添加代理方法

 1 #pragma mark -CLLocationManagerDelegate

 2 - (void)locationManager:(CLLocationManager *)manager didStartMonitoringForRegion:(CLRegion *)region

 3 {

 4     NSLog(@"成功开启区域监测");

 5 }

 6 

 7 - (void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region

 8 {

 9     NSLog(@"你已进入监测区域");

10 }

11 

12 - (void)locationManager:(CLLocationManager *)manager didExitRegion:(CLRegion *)region

13 {

14     NSLog(@"你已经离开监测区域");

15     

16     // 关闭区域监测

17     if ([region.identifier  isEqual: @"region"]) {

18         [self.locMgr stopMonitoringForRegion:region];

19     }

20 

21 }