ios - 未调用 CLLocation 管理器 didStartMonitoringForRegion 委托(delegate)方法

Question

我正在尝试在我的应用程序中使用位置监控。我可以设置我的位置和 reverseGeocode 我想监控的位置。 didUpdateToLocation 委托(delegate)方法工作正常，并不断更新，但 didStartMonitoingForRegion 委托(delegate)永远不会被调用，didExitRegion 和 didEnterRegion.

有什么建议吗？

- (IBAction)setLocation:(UIButton *)sender {
    if(!self.locationManager) self.locationManager = [[CLLocationManager alloc] init];
    [self.locationManager setDelegate:self];
    [self.locationManager setDesiredAccuracy:kCLLocationAccuracyBest];
    [self.locationManager setDistanceFilter:10];  // Update again when a user moves     distance in meters

    [self.locationManager setPurpose:@"Set location based alerts if switch is on"];
    self.plugLocation=nil; //reset to nil so didUpdateToLocation will update it
    self.distanceLabel.text=[NSString stringWithFormat:@"%d",0];

    [self.locationManager startUpdatingLocation];


    if ( ![CLLocationManager regionMonitoringAvailable] || ![CLLocationManager regionMonitoringEnabled] ){
        NSLog(@"Location monitoring not  Unavailable");
    }else {

    }
}
-(void)setPlugLocation:(CLLocation *)plugLocation{
    //
    if (!_plugLocation) _plugLocation=[[CLLocation alloc]init];
        _plugLocation=plugLocation;
    if (_plugLocation) {
        [self setRegion:plugLocation radius:20 name:self.plugName];
        [self reverseGeocode:self.plugLocation];
         NSLog(@"setPlugLocation %@", [self.plugLocation description]);
            }
}

 -(void)setRegion:(CLLocation *)center radius:(double)meters name:(NSString*)name{
     CLLocationCoordinate2D plug2D;
     plug2D.latitude=center.coordinate.latitude;
     plug2D.longitude=center.coordinate.longitude;
     CLRegion *region = [[CLRegion alloc] initCircularRegionWithCenter:plug2D radius:meters identifier:name];
     [self.locationManager startMonitoringForRegion:region      desiredAccuracy:kCLLocationAccuracyBest]; 
 }

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation{    
    self.latitudeLabel.text=[NSString stringWithFormat:@"%f",newLocation.coordinate.latitude];
    self.longitudeLabel.text=[NSString stringWithFormat:@"%f",newLocation.coordinate.longitude];

    if (self.plugLocation == nil)self.plugLocation = newLocation;
    if (self.plugLocation!=nil) {
    CLLocationDistance distanceBetween = [newLocation distanceFromLocation:self.plugLocation];
     NSLog(@"didUpdateToLocation Distance from plug=%f",distanceBetween);
    self.distanceLabel.text=[NSString stringWithFormat:@"%f",distanceBetween];
    }
}

 -(void)reverseGeocode:(CLLocation *)coordinates;{
     if (!self.plugGeo) self.plugGeo = [[CLGeocoder alloc] init];
[self.plugGeo reverseGeocodeLocation:coordinates completionHandler:^(NSArray *placemarks, NSError *error) {
    if (error==nil&&[placemarks count]>0) {
        CLPlacemark *placemark=[placemarks objectAtIndex:0];
        NSLog(@" setPlugLocation geocodeAddressString %@",placemark);
        //should also transfer back to plug detail and save
        self.locationLabel.text=[NSString stringWithFormat:@"%@ %@\n%@, %@", placemark.subThoroughfare,  placemark.thoroughfare, placemark.locality,placemark.postalCode];
        [self sendAlertMessage:[NSString stringWithFormat:@"%@ %@\n%@, %@", placemark.subThoroughfare,  placemark.thoroughfare, placemark.locality,placemark.postalCode] title:@"Success"];
    }else {
        NSLog(@" setPlugLocation couldn't geoCode address %@",error);
    }
}];  
 }

Answer 1

您是否使用模拟器来测试您的应用程序？我发现模拟器对于区域退出/进入完全不可靠。通过插入并从 iPhone 模拟器更改为 iOS 设备，尝试在您的设备上编译项目。然后，您可以拔下设备并从手机运行您的应用程序以对其进行测试。

为什么模拟器不适用于区域？区域主要由 Apple 的隐藏算法确定，该算法使用 Wi-Fi、手机信号塔和手机上请求位置的其他应用程序。由于模拟器不使用 Wi-Fi 或手机信号塔……区域监控将变得几乎不可能。

很可能您的代码没有问题(我没有看到明显的错误)，但模拟器给您的结果很糟糕。在您的设备上试用它，如果效果相同，请告诉我们。