objective-c – didStartMonitoringForRegion为一个startMonitoringForRegion调用两次

我已经通过调用startMonitoringForRegion开始了区域监视.但是我发现didStartMonitoringForRegion被调用了两次,而且didEnterRegion被调用了两次.但我只调用一次startMonitoringForRegion.我的代码

- (void) enableRegionMonitoring:(NSMutableDictionary *)LOCATIOnInfoDic{

NSLog(@"started Loc Mon");
lOCMgr = [[CLLOCATIOnManager alloc] init];
[lOCMgr setDelegate:self];
NSString *LOCATIOnId=[[NSString alloc]init];
double latitude=[[LOCATIOnInfoDic objectForKey:@"lat"] doubleValue];
double longitude=[[LOCATIOnInfoDic objectForKey:@"lon"] doubleValue];
if([LOCATIOnInfoDic objectForKey:@"key"]){
    LOCATIOnId=[LOCATIOnInfoDic objectForKey:@"key"] ;
}else{
    LOCATIOnId=@"NA";
}

CLLOCATIOnCoordinate2D mymonLOCATIOn = CLLOCATIOnCoordinate2DMake(latitude,longitudE);
CLRegion *myRegion = [[CLRegion alloc]
                      initCircularRegionWithCenter:mymonLOCATIOn
                      radius:100
                      identifier:LOCATIOnId];
[lOCMgr startMonitoringForRegion:myRegion
                          desiredAccuracy:kCLLOCATIOnAccuracyBest];

}





- (void)LOCATIOnManager:(CLLOCATIOnManager *)manager didStartMonitoringForRegion:(CLRegion *)region{
NSLog(@"Region monitoring started\n%@",[region description]);
}