iOS requestStateForRegion正在返回。didStartMonitoringFor后未知

不明白为什么我的AppDelegate CLLocationManager有时无法成功确定CLRegionState（CLRegionState.unknown），即使我确保在

didStartMonitoringForRegion

之后才调用

requestStateForRegion

。看起来像是某种比赛状态，我不明白我是怎么处理的

相关的，当我得到CLRegionState.unknown时，我应该怎么做？一直请求状态直到我得到什么？（这似乎很糟糕）

AppDelegate：

- (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions
{   
    self.locationManager = [[CLLocationManager alloc] init];
    [self.locationManager setDelegate:self];

    return [super application:application didFinishLaunchingWithOptions:launchOptions];
}

- (void)locationManager:(CLLocationManager *)manager didStartMonitoringForRegion:(nonnull CLRegion *)region {
    NSLog(@"%@", [NSString stringWithFormat:@"didStartMonitoringFor region with ID: %@", region.identifier]);
    // delay per https://stackoverflow.com/a/33288103/3380970
    double delayInSeconds = 2.0;
    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
    dispatch_after(popTime, dispatch_get_main_queue(), ^(void) {
        [self.locationManager requestStateForRegion:region];
    });
}

- (void)locationManager:(CLLocationManager *)manager didDetermineState:(CLRegionState)state forRegion:(nonnull CLRegion *)region {
    NSLog(@"%@", [NSString stringWithFormat:@"didDetermineState from AppDelegate CLLocationManager: %@ (%ld)", region.identifier, (long)state ]);
    NSString *baseUrl = [self fetchBaseUrl];
    switch (state) {
        case CLRegionStateInside:
            NSLog(@"%@", @"Determined .inside state for geofence");
            [HelperFunctions postGeofenceTransitionWithBaseUrl:baseUrl region:region transitionType:1];
            break;
        default:
            break;
    }
}

Abdriged日志：

Adding geofence with ID: 5:90fd74e0-cbc7-dbe5-20fc-b870203055e1    
Adding geofence with ID: 8:d408f466-ea1b-6cbb-382f-f7567db61157
Adding geofence with ID: 7:ba97dda2-39a7-9b95-8ea9-ea183d69a858

didStartMonitoringFor region with ID: 5:90fd74e0-cbc7-dbe5-20fc-b870203055e1
didStartMonitoringFor region with ID: 8:d408f466-ea1b-6cbb-382f-f7567db61157
didStartMonitoringFor region with ID: 7:ba97dda2-39a7-9b95-8ea9-ea183d69a858

didDetermineState from AppDelegate CLLocationManager: 5:90fd74e0-cbc7-dbe5-20fc-b870203055e1 (0)
didDetermineState from AppDelegate CLLocationManager: 8:d408f466-ea1b-6cbb-382f-f7567db61157 (0)
didDetermineState from AppDelegate CLLocationManager: 7:ba97dda2-39a7-9b95-8ea9-ea183d69a858 (0)

---

谢谢

这是因为您在块内使用了输入参数

region

，而没有使其成为块变量

在

-（void）locationManager:（CLLocationManager*）manager didStartMonitoringForRegion:（非空CLRegion*）区域{

添加：

__block CLRegion *blockRegion = region;

---

并在你的区块内使用

blockRegion

。

作为一个巨大的obj-c noob，我很自然地会搞乱变量范围。这似乎解决了我的问题，谢谢！