UIButton не будет скрывать и индикатор активности не запускается

Question

Я пытаюсь скрыть кнопку и запустить индикатор активности, когда моя кнопка нажата, но ничего не происходит. Кнопка и активность - это как IBOutlets. Я знаю, что кнопка работает, потому что она подталкивает следующий контроллер представления после получения данных.

Вот весь код:

@interface MembershipInfoViewController() 

@end 

@implementation MembershipInfoViewController { 
    Menu *menuClass; 
} 

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 
{ 
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 
    if (self) { 
     menuClass = [[Menu alloc]init]; 
    } 
    return self; 
} 

- (void)viewDidLoad { 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view from its nib. 

    self.title = @"Enter Membership Info"; 

    [self.loadingIndicator stopAnimating]; 

    self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil]; 

    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) 
    { 
     UIImage *hamburgerButton = [UIImage imageNamed:@"list_button"]; 
     UIBarButtonItem *listButton = [[UIBarButtonItem alloc]initWithImage:hamburgerButton style:UIBarButtonItemStylePlain target:self action:@selector(showMenuList)]; 
     self.navigationItem.leftBarButtonItem = listButton; 

     UISwipeGestureRecognizer *swipeRecognizer = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(showMenuList)]; 
     swipeRecognizer.direction = UISwipeGestureRecognizerDirectionRight; 
     [self.view addGestureRecognizer:swipeRecognizer]; 
    } 

    UIColor *kfbBlue = [UIColor colorWithRed:8.0/255.0f green:77.0/255.0f blue:139.0/255.0f alpha:1]; 

    self.firstName.textColor = kfbBlue; 
    self.firstName.autocorrectionType = UITextAutocorrectionTypeNo; 
    self.firstName.keyboardType = UIKeyboardTypeDefault; 
    self.firstName.returnKeyType = UIReturnKeyDefault; 
    self.firstName.clearButtonMode = UITextFieldViewModeWhileEditing; 
    self.firstName.clearsOnBeginEditing = TRUE; 
    self.firstName.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter; 

    self.lastName.textColor = kfbBlue; 
    self.lastName.autocorrectionType = UITextAutocorrectionTypeNo; 
    self.lastName.keyboardType = UIKeyboardTypeDefault; 
    self.lastName.returnKeyType = UIReturnKeyDefault; 
    self.lastName.clearButtonMode = UITextFieldViewModeWhileEditing; 
    self.lastName.clearsOnBeginEditing = TRUE; 
    self.lastName.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter; 

    self.membershipNumber.textColor = kfbBlue; 
    self.membershipNumber.autocorrectionType = UITextAutocorrectionTypeNo; 
    self.membershipNumber.keyboardType = UIKeyboardTypeDefault; 
    self.membershipNumber.returnKeyType = UIReturnKeyDefault; 
    self.membershipNumber.clearButtonMode = UITextFieldViewModeWhileEditing; 
    self.membershipNumber.clearsOnBeginEditing = TRUE; 
    self.membershipNumber.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter; 

    self.checkInfoButton.layer.borderColor = [UIColor whiteColor].CGColor; 
} 

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

- (IBAction)checkInfo { 
    if ([self.firstName.text isEqual:@""]||[self.lastName.text isEqual:@""]||[self.membershipNumber.text isEqual:@""]) { 
     UIAlertView *emptyFieldAlert = [[UIAlertView alloc]initWithTitle:@"All Fields Are Required!" message:@"Please fill out all fields." delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil]; 
     [emptyFieldAlert show]; 
    } 
    else if (self.membershipNumberString.length < 10||self.membershipNumberString.length > 10) { 
     UIAlertView *numberAlert = [[UIAlertView alloc]initWithTitle:@"Membership Number Must Be 10 Characters!" message:@"" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil]; 
     [numberAlert show]; 
    } 
    else { 
     [self.checkInfoButton setHidden:YES]; 
     [self.loadingIndicator startAnimating]; 

     NSString *urlString = @"http://127.0.0.1:8888/PhpProject1/DBTest.php?first_name=%@&last_name=%@&membership_number=%@"; 
     NSString *stringURL = [NSString stringWithFormat:urlString, _firstNameString, _lastNameString, _membershipNumberString]; 

     self.url = [NSURL URLWithString:stringURL]; 

     dispatch_async(kBgQueue, ^{ 
      NSData *data = [NSData dataWithContentsOfURL:self.url]; 
      if (data == nil) 
      { 
       NSLog(@"data is nil"); 
      } 
      else 
      { 
       [self performSelectorOnMainThread:@selector(fetchData:) withObject:data waitUntilDone:YES]; 
      } 

      if ([self.responseStatus isEqual:@"A"]) { 
       MembershipCardViewController *cardView = [[MembershipCardViewController alloc]initWithNibName:nil bundle:nil]; 
       NSString *fullName = [[self.responseFirstName stringByAppendingString:@" "]stringByAppendingString:self.responseLastName]; 
       cardView.nameString = fullName; 
       [self.navigationController pushViewController:cardView animated:YES]; 
      } 
      else { 
       UIAlertView *notActiveAlert = [[UIAlertView alloc]initWithTitle:@"" message:@"There is no active membership matching this information. If you are a past member, please make sure your membership is paid for the current year." delegate:self cancelButtonTitle:@"OK" otherButtonTitles:@"My Account", nil]; 
       [notActiveAlert show]; 
      } 
     }); 
    } 
} 

- (void)fetchData:(NSData *)responseData { 
    NSError *error; 

    NSArray *jsonArray = [NSJSONSerialization JSONObjectWithData:responseData options:kNilOptions error:&error]; 

    for (int i = 0; i < jsonArray.count; i++) { 
     NSDictionary *jsonElement = jsonArray[i]; 

     self.responseStatus = jsonElement[@"STATUS"]; 
     self.responseFirstName = jsonElement[@"FIRST_NAME"]; 
     self.responseLastName = jsonElement[@"LAST_NAME"]; 
     self.responseNumber = jsonElement[@"MEMBERSHIP_NUMBER"]; 
    } 

    [self.loadingIndicator stopAnimating]; 
    [self.checkInfoButton setHidden:NO]; 
} 

- (void) myKYFB { 
    KFBAppDelegate *appDelegate = (KFBAppDelegate *)[[UIApplication sharedApplication]delegate]; 
    KFBNavControllerViewController *navController; 

    MyKYFB *myKYFB = [[MyKYFB alloc]initWithNibName:nil bundle:nil]; 
    navController = [[KFBNavControllerViewController alloc]initWithRootViewController:myKYFB]; 
    [UIView transitionWithView:appDelegate.window 
         duration:0.5 
         options:UIViewAnimationOptionTransitionFlipFromRight 
        animations:^{ 
         appDelegate.window.rootViewController = navController; 
        } 
        completion:nil]; 
} 

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex { 
    if (buttonIndex == 1) { 
     [self myKYFB]; 
    } 
} 

- (void)showMenuList { 
    [menuClass createMenu]; 
} 

- (void)closeMenu { 
    [menuClass removeMenu]; 
} 

#pragma mark - TextField Delegate Methods 

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
    [self.firstName resignFirstResponder]; 
    [self.lastName resignFirstResponder]; 
    [self.membershipNumber resignFirstResponder]; 
} 

- (BOOL)textFieldShouldReturn:(UITextField *)textField 
{ 
    [self.firstName resignFirstResponder]; 
    [self.lastName resignFirstResponder]; 
    [self.membershipNumber resignFirstResponder]; 

    return YES; 
} 

- (void)textFieldDidEndEditing:(UITextField *)textField 
{ 
    self.firstNameString = self.firstName.text; 
    self.lastNameString = self.lastName.text; 
    self.membershipNumberString = self.membershipNumber.text; 
} 


@end 

Answer 1

Ваш код должен работать, но иногда этот код не работает. Многие пользователи также сталкиваются с этой проблемой ранее, используя ниже код, это будет работать точно.

dispatch_async(dispatch_get_main_queue(), ^{ 
    self.checkInfoButton.hidden = YES; //works 
}); 

Answer 2

Мне просто пришлось переместить это из fetchData: прямо перед тем, как я нажму новый контроллер вида.

[self.loadingIndicator stopAnimating]; 
[self.checkInfoButton setHidden:NO];