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我对 iOS 开发相当陌生，我正在尝试创建一个允许区域监控的应用程序。类似于 iOS 提醒应用程序。

我的代码已经到了开始监视区域的地步，它应该在我进入和离开某个区域时通知我。但是，它只告诉我我何时在该地区。当我离开时，它没有告诉我。

你知道，我正在我的 iPhone 上测试这个，并且肯定超出了 100m 的半径（我开车离开我家 10 分钟）。它不断循环消息说我在该地区，但当我离开该地区时从未改变。我真的很困惑我哪里出错了。任何人都可以帮忙吗？另外，出于好奇，由于我是 iOS 开发的新手，我是否以正确的方式进行此操作？或者有没有更有效的方法来实现这一点？任何建议，教程，howto's 将不胜感激。多谢你们！我的启动区域监控的代码和方法如下。如果您需要任何其他代码，请告诉我。

(IBAction)addRegion:(id)sender {
    if ([CLLocationManager isMonitoringAvailableForClass:[CLBeaconRegion class]]) {
        // Create a new region based on the center of the map view.
        CLLocationCoordinate2D coord = CLLocationCoordinate2DMake(_mapView.centerCoordinate.latitude, _mapView.centerCoordinate.longitude);
        region = [[CLCircularRegion alloc] initWithCenter:coord
                                           radius:Radius
                                       identifier:[NSString stringWithFormat:@"%f, %f", _mapView.centerCoordinate.latitude, _mapView.centerCoordinate.longitude]];


        // Start monitoring the newly created region.
        [_locationManager startMonitoringForRegion:(CLRegion *)region];
    }
    else {
     NSLog(@"Region monitoring is not available.");
    }
}

(IBAction)stopMonitoringRegion:(id)sender {
   [_locationManager stopMonitoringForRegion:(CLRegion *)region];
}

(void)locationManager:(CLLocationManager *)manager
     didDetermineState:(CLRegionState)state forRegion:(CLRegion *)reg {

   if (state == CLRegionStateInside) {
       //call didEnterRegion
       //[_locationManager stopMonitoringForRegion:region];
       [self locationManager:_locationManager didEnterRegion:region];
   }
   if (state == CLRegionStateOutside) {
       //call didExitRegion
       //[_locationManager stopMonitoringForRegion:region];
       [self locationManager:_locationManager didExitRegion:region];
   }
}

(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
    NSLog(@"didFailWithError: %@", error);
}


(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {

//requestStateForRegion
if (region == nil) {
    //do nothing
    NSLog(@"didUpdateToLocation %@ from %@", newLocation, oldLocation);
}else{
[_locationManager requestStateForRegion:region];
    NSLog(@"didUpdateToLocation %@ from %@", newLocation, oldLocation);
}
}


(void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region  {
    NSLog(@"didEnterRegion %@ at %@", region.identifier, [NSDate date]);
}


(void)locationManager:(CLLocationManager *)manager didExitRegion:(CLRegion *)region {
    NSLog(@"didExitRegion %@ at %@", region.identifier, [NSDate date]);
}

(void)locationManager:(CLLocationManager *)manager monitoringDidFailForRegion:(CLRegion *)region withError:(NSError *)error {
    NSLog(@"monitoringDidFailForRegion %@: %@ Error: %@", region.identifier, [NSDate date], error);
}
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