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iOS CoreLocation之区域监测

2024-08-08 09:04:43   219人阅读

CoreLocation的区域监测,下图来自疯狂iOS讲义

区域监测示意图

 

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 *)region13 {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 }

 

iOS CoreLocation之区域监测


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