你能帮我解决位置监控的问题吗？didenter 和 didexit 从来没有被调用过。顺便说一句，我正在 iPhone 上测试它。代码中是否还有其他需要更改或添加的内容。任何形式的帮助表示赞赏。谢谢你。
下面是代码：
- (void)viewDidLoad {
_manager=[[CLLocationManager alloc]init];
_mView.delegate=self;
[_manager requestWhenInUseAuthorization];
_manager.delegate=self;
_manager.desiredAccuracy=kCLLocationAccuracyNearestTenMeters;
_manager.distanceFilter=100;
[_manager startUpdatingLocation];
_mView.showsUserLocation=YES;
CLLocationCoordinate2D c;
c.latitude=33.420647;
c.longitude=-111.918893;
c=CLLocationCoordinate2DMake(c.latitude, c.longitude);
CLCircularRegion *circle=[[CLCircularRegion alloc]initWithCenter:c radius:100 identifier:@"string"];
if ([CLLocationManager isMonitoringAvailableForClass:[CLCircularRegion class]]) {
NSLog(@"yes");
[ _manager startMonitoringForRegion:circle];
circle.notifyOnEntry=YES;
circle.notifyOnExit=YES;
}
-(void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region{
NSLog(@"Inside");
UIAlertController *alert=[UIAlertController alertControllerWithTitle:@"Monitoring"
message:@"Inside" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *action=[UIAlertAction actionWithTitle:@"Ok" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
}];
[alert addAction:action];
[self presentViewController:alert animated:YES completion:nil];
}
-(void)locationManager:(CLLocationManager *)manager didExitRegion:(CLRegion *)region{
NSLog(@"Outside");
UIAlertController *alert=[UIAlertController alertControllerWithTitle:@"Monitoring" message:@"Outside" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *action=[UIAlertAction actionWithTitle:@"Ok" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
}];
[alert addAction:action];
[self presentViewController:alert animated:YES completion:nil];
}