Question

使用Apple's documentation，Stackoverflow，Google尝试了一段时间后，当我进入或退出我正在监控的区域时，我仍然无法显示简单的UIAlertView。

self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.distanceFilter = kCLDistanceFilterNone;
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest; 
self.locationManager.delegate = self;
[locationManager requestAlwaysAuthorization];

for (CLRegion *monitored in [self.locationManager monitoredRegions])
    [locationManager stopMonitoringForRegion:monitored];

CLLocationCoordinate2D coord;
coord.latitude = 31.521603;
coord.longitude = 33.01190;
CLCircularRegion *region = [[CLCircularRegion alloc]initWithCenter:coord radius:20 identifier:@"work"];

- (void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region
{
    [self showMessage:[NSString stringWithFormat:@"EnterRegion: %@",region.identifier] andMessage:@"Welcome Home" andButton:@"Ok"];
}

- (void)locationManager:(CLLocationManager *)manager didExitRegion:(CLRegion *)region
{
    [self showMessage:[NSString stringWithFormat:@"ExitRegion: %@",region.identifier] andMessage:@"Bye Bye" andButton:@"Ok"];
}

-(void)locationManager:(CLLocationManager *)manager didStartMonitoringForRegion:(CLRegion *)region {
    NSLog(@"Now monitoring for %@", region.identifier);
}

- (void)locationManager:(CLLocationManager *)manager monitoringDidFailForRegion:(CLRegion *)region withError:(NSError *)error{
    [self showMessage:@"msg" andMessage:[NSString stringWithFormat:@"Region Failed:%@",region.identifier] andButton:@"ok"];
}

- (void)locationManager:(CLLocationManager *)manager
      didDetermineState:(CLRegionState)state forRegion:(CLRegion *)region
{
    [self showMessage:[NSString stringWithFormat:@"Did Determine State: %@. state:%@",region.identifier, (state == CLRegionStateUnknown) ? @"Unknown" : (state == CLRegionStateInside) ? @"INSIDE" : @"OUTSIDE"] andMessage:@"Determined" andButton:@"Ok"];

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

showMessage只是向用户弹出的UIAlertView。有时候，当我设置区域时，我会得到monitoringDidFailForRegion。我在想是否应该将我的应用标记为使用＆＃34;背景模式＆＃34;对于位置更新，但这没有改变。好像它应该工作，但我永远不会得到didEnterRegion或didExitRegion被调用。

我应该指出，我使用所需的密钥更新了info.plist：

 <key>NSLocationAlwaysUsageDescription</key>
 <string>Location is required for geofence</string>

Background app refresh设置为On，已启用位置。在外面，物理上进行测试，我无法获得要调用的功能什么是错误的？是不是太短了20米来定义一个地区？可能是区域监控不适用于前台的应用程序吗？沉默回调？

无法让区域监控功能正常运行

0 个答案: