iOS顯示警告取決於國家用戶在

Question

在我的應用程序中，我需要檢查用戶的國家，然後顯示基於此的警報。在AppDelegate的文件，我在didFinishLaunchingWithOptions：

self.locationManager = [[CLLocationManager alloc] init]; 
    self.locationManager.delegate = self; 
    //Here you set the Distance Filter that you need 
    self.locationManager.distanceFilter = kCLDistanceFilterNone; 
    // Here you set the Accuracy 
    self.locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation; 
    [self.locationManager startUpdatingLocation]; 

那麼對於委託我有這個。它有效，但警報不斷重新出現。我怎麼只運行一次？

-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations { 
    NSLog(@"Running"); 
    CLLocation *newLocation = [locations lastObject]; 

    CLGeocoder *reverseGeocoder = [[CLGeocoder alloc] init]; 

    [reverseGeocoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray *placemarks, NSError *error) 
    { 


     CLPlacemark *myPlacemark = [placemarks objectAtIndex:0]; 
     NSString *countryCode = myPlacemark.ISOcountryCode; 
     NSString *countryName = myPlacemark.country; 
     NSLog(@"My country code: %@ and countryName: %@", countryCode, countryName); 
     NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; 
     if ([countryName isEqualToString:@"Thailand"]) { 
      [defaults setBool:NO forKey:@"TestMode"]; 
      [defaults synchronize]; 
     } 
     else { 
      [defaults setBool:YES forKey:@"TestMode"]; 
      [defaults synchronize]; 
      UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Test Mode" message:@"Currently, live distribution is limited to the country of Thailand. You may still use the app in 'Test Mode' to store distribution data on your machine. When your country is added, you will have the option to upload it to our server." delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil]; 
      [alert show]; 
     } 

    }]; 




} 

Answer 1

取一個bool值。這應該是第一次是假的。然後用這個替換你的代碼。

-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations { 
    NSLog(@"Running"); 
    CLLocation *newLocation = [locations lastObject]; 
    [manager stopUpdatingLocation]; 

    CLGeocoder *reverseGeocoder = [[CLGeocoder alloc] init]; 
    [reverseGeocoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray *placemarks, NSError *error) 
    { 


     CLPlacemark *myPlacemark = [placemarks objectAtIndex:0]; 
     NSString *countryCode = myPlacemark.ISOcountryCode; 
     NSString *countryName = myPlacemark.country; 
     NSLog(@"My country code: %@ and countryName: %@", countryCode, countryName); 
     NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; 
     if ([countryName isEqualToString:@"Thailand"]) { 
      [defaults setBool:NO forKey:@"TestMode"]; 
      [defaults synchronize]; 
     } 
     else { 
      [defaults setBool:YES forKey:@"TestMode"]; 
      [defaults synchronize]; 

       if(boolvar == false){ 
       boolvar = true 

      UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Test Mode" message:@"Currently, live distribution is limited to the country of Thailand. You may still use the app in 'Test Mode' to store distribution data on your machine. When your country is added, you will have the option to upload it to our server." delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil]; 
      [alert show]; 
     } 
} 
    }]; 

} 

Answer 2

而不是使用...

[self.locationManager startUpdatingLocation]; 

...它告訴外景經理到每一個它得到一個位置更新時間發送有關位置的更新，你爲什麼不使用：

[self.locationManager requestLocation]; 

哪個只會向您發送位置管理員獲得的第一個位置。