IOS7 NSURLConnection ничего не происходит

Question

Я довольно новичок в программировании IOS и хочу, чтобы местоположение пользователя на сервере. Я следил за библиотекой разработчиков iOS и учебными пособиями в Интернете, но ничего не происходит, когда я запускаю код. Я использую симулятор iOS, и он дает мне макет местоположения хорошо, и я получаю экземпляр NSURLConnection. Однако на серверной стороне ничего не происходит.

#import "JLSViewController.h" 
#import <CoreLocation/CoreLocation.h> 
#import "JLSEventData.h" 

@interface JLSViewController() 

@property (nonatomic, strong) CLLocationManager *locationManager; 
@property (nonatomic, strong) NSMutableArray *locations; 

@end 

@implementation JLSViewController 

NSMutableData *responseData = nil; 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 
    self.locations = [[NSMutableArray alloc] init]; 
    self.locationManager = [[CLLocationManager alloc] init]; 
    self.locationManager.desiredAccuracy = kCLLocationAccuracyBest; 
    self.locationManager.delegate = self; 
} 

- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 

- (IBAction)enabledStateChanged:(id)sender 
{ 
    if (self.switchEnabled.on) 
    { 
     [self.locationManager startUpdatingLocation]; 
    } 
    else 
    { 
     [self.locationManager stopUpdatingLocation]; 
    } 
} 

- (void)beginBackgroundUpdateTask: (CLLocation *)location { 

} 

- (void)endBackgroundUpdateTask { 

} 

#pragma mark - CLLocationManagerDelegate 
- (void)locationManager:(CLLocationManager *)manager 
    didUpdateToLocation:(CLLocation *)newLocation 
      fromLocation:(CLLocation *)oldLocation { 
    if (newLocation == nil) { 
     return; 
    } 

    if (oldLocation != nil) { 
     if (newLocation.coordinate.latitude == oldLocation.coordinate.latitude && 
      newLocation.coordinate.longitude == oldLocation.coordinate.longitude) { 
      return; 
     } 
    } 

    NSError *error = nil; 
    JLSEventData *eventData = [[JLSEventData alloc] initWithLocation: newLocation]; 

    NSString *strData = [eventData toJSON:error]; 
    if (error != nil){ 
     return; 
    } 

    if (self.locations.count>5) 
     [self.locations removeObjectAtIndex:0]; 

    [self.locations addObject:strData]; 
    NSData *requestBodyData = [NSJSONSerialization dataWithJSONObject:self.locations options:NSJSONWritingPrettyPrinted error:&error]; 
    if (error != nil){ 
     return; 
    } 

    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ 
     //[self beginBackgroundUpdateTask:newLocation]; 

     // Send a synchronous request 
     NSMutableURLRequest * urlRequest = [NSMutableURLRequest requestWithURL:[NSURL URLWithString: "http://localhost:8080/mywebservice"]]; 
     [urlRequest setValue:@"application/json; charset=utf-8" forHTTPHeaderField:@"Content-Type"]; 
     [urlRequest setValue:@"application/json" forHTTPHeaderField:@"Accept"]; 
     [urlRequest setHTTPMethod:@"POST"]; 
     //[urlRequest setTimeoutInterval:20]; 

     //NSJSONSerialization dataWithJSONObject 
     urlRequest.HTTPBody = requestBodyData; 

     // Create url connection and fire request 
     [urlRequest setHTTPBody:[NSData dataWithBytes:[strData UTF8String] length:strlen([strData UTF8String])]]; 

     NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:urlRequest delegate:self]; 
     if (conn!=nil){ 
      //receivedData = nil; 
     } 
    }); 
} 

#pragma mark - NSURLConnection Delegate 
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { 
    NSLog(@"==>didReceiveResponse"); 
    // A response has been received, this is where we initialize the instance var you created 
    // so that we can append data to it in the didReceiveData method 
    // Furthermore, this method is called each time there is a redirect so reinitializing it 
    // also serves to clear it 
    responseData = [[NSMutableData alloc] init]; 

} 

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { 
    NSLog(@"==>didReceiveData"); 
    // Append the new data to the instance variable you declared 
    [responseData appendData:data]; 
} 

- (NSCachedURLResponse *)connection:(NSURLConnection *)connection 
        willCacheResponse:(NSCachedURLResponse*)cachedResponse { 
    // Return nil to indicate not necessary to store a cached response for this connection 
    return nil; 
} 

- (void)connectionDidFinishLoading:(NSURLConnection *)connection { 
    // The request is complete and data has been received 
    // You can parse the stuff in your instance variable now 
    NSLog(@"Succeeded! Received %d bytes of data",[responseData length]); 

    responseData = nil; 
} 

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { 
    // The request has failed for some reason! 
    // Check the error var 
    NSLog(@"Connection failed! Error - %@ %@", 
      [error localizedDescription], 
      [[error userInfo] objectForKey:NSURLErrorFailingURLStringErrorKey]); 
} 
/* 
* 
*/ 
- (void)parseData { 
    //Do something 
} 

@end 

Любая помощь будет оценена по достоинству.

Answer 1

Вы выполняете NSURLConnection в отдельном потоке. И поток выходит до получения ответа. Вам нужно либо выполнить NSURLConnection в основном потоке, либо вам нужно поддерживать поток до тех пор, пока не будет получен ответ.