的LocationManager didFailWithError

Question

1周，如果我的GPS應用程序無法檢索信號（例如：在我家裏測試）我沒有收到任何ALER。 我安裝我的錯誤通知以這種方式

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {  NSString *errorType = (error.code == kCLErrorDenied) ? 
@"Access Denied" : @"Errore sconosciuto"; 
UIAlertView *alert = [[UIAlertView alloc] 
         initWithTitle:@"Errore recuperando la Location" 
         message:errorType 
         delegate:nil 
         cancelButtonTitle:@"Okay" 
         otherButtonTitles:nil]; 
[alert show]; 
[alert release]; 
} 

原因是什麼應用程序不檢索數據並沒有顯示我的警報彈出？

Answer 1

，因爲你只檢查一個條件開關罩 需要實現像

- (void)locationManager: (CLLocationManager *)manager 
      didFailWithError: (NSError *)error 
    { 
     [manager stopUpdatingLocation]; 
     NSLog(@"error%@",error); 
     switch([error code]) 
     { 
      case kCLErrorNetwork: // general, network-related error 
      { 
       UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"please check your network connection or that you are not in airplane mode" delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil]; 
       [alert show]; 
       [alert release]; 
      } 
        break; 
      case kCLErrorDenied:{ 
       UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"user has denied to use current Location " delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil]; 
       [alert show]; 
       [alert release]; 
      } 
        break; 
      default: 
      { 
       UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"unknown network error" delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil]; 
       [alert show]; 
       [alert release]; 
      } 
        break; 
      } 
     } 

    } 

還有2多的情況下kCLErrorHeadingFailure和kCLErrorLocationUnknown但一般不會需要它...