ChildViewController not able to modify its UI after creation - ios

Question

I have a view controller which is being added as a child view controller. The problem is that after the child controller creates its view, I am not able to modify it.
It loads everything properly, but when I want to hide a text field on clicking a button (textfield.hidden = YES), nothing happens!
This is my loadView :
-(void)loadView {
self.waitingPopup = [[WaitingPopupViewController alloc]initWithLabel:#"loading salon"];
self.view=[[UIView alloc] initWithFrame:[UIScreen mainScreen].applicationFrame];
// self.view.frame=CGRectMake(0, -20, self.view.frame.size.width, self.view.frame.size.height);
scrollableTable=[[UITableView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
scrollableTable.delegate=self;
scrollableTable.dataSource=self;
[self.view addSubview:scrollableTable];
headerHolder=[[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height-44)];
//creating and adding backgroundImage view container and setting the image
// saloonHomeImage.backgroundColor = [UIColor grayColor];
saloonHomeImage.frame=CGRectMake(self.view.frame.origin.x, 0, self.view.frame.size.width, self.view.frame.size.height);
saloonHomeImage.contentMode = UIViewContentModeScaleAspectFill;
//[saloonHomeImage setBackgroundColor:[UIColor redColor]];
[headerHolder setBackgroundColor:[UIColor grayColor]];
[headerHolder addSubview:saloonHomeImage];
//creating and adding saloonheader label
saloonLabel=[[UILabel alloc] initWithFrame:CGRectMake(0, 32, self.view.frame.size.width, 48)];
saloonLabel.text=#"";
saloonLabel.textAlignment=NSTextAlignmentCenter;
[saloonLabel setTextColor:[UIColor whiteColor]];
[saloonLabel setFont:[UIFont fontWithName:#"vevey" size:48]];
[headerHolder addSubview:saloonLabel];
//creating and adding book appointment button
UIButton *bookAppointmentButton=[UIButton buttonWithType:UIButtonTypeSystem];
NSLog(#"%f", self.view.frame.size.height-97.5);
bookAppointmentButton.frame=CGRectMake(self.view.frame.origin.x, self.view.frame.size.height-97.5, 216, 53);
[bookAppointmentButton setBackgroundImage:[UIImage imageNamed:#"bg-left.png"] forState:UIControlStateNormal];
[bookAppointmentButton setTitle:#"BOOK APPOINTMENT" forState:UIControlStateNormal];
[bookAppointmentButton addTarget:self action:#selector(bookAppointmentAction) forControlEvents:UIControlEventTouchUpInside];
[bookAppointmentButton setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
[headerHolder addSubview:bookAppointmentButton];
UIButton *callButton=[UIButton buttonWithType:UIButtonTypeSystem];
callButton.frame=CGRectMake(216, self.view.frame.size.height-97.5, self.view.frame.size.width-216, 53);
[callButton setBackgroundImage:[UIImage imageNamed:#"bg-right.png"] forState:UIControlStateNormal];
[callButton addTarget:self action:#selector(callButtonAction) forControlEvents:UIControlEventTouchUpInside];
[callButton setTitle:#"CALL" forState:UIControlStateNormal];
[callButton setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
[headerHolder addSubview:callButton];
[self getSalonDetails];
loading=[[UIImageView alloc] init];
loading.frame=CGRectMake(130,200,40,36);
[loading setBackgroundColor:[UIColor clearColor]];
loading.animationImages = [NSArray arrayWithObjects:
[UIImage imageNamed:#"spinner-1.png"],
[UIImage imageNamed:#"spinner-2.png"],
[UIImage imageNamed:#"spinner-3.png"],
[UIImage imageNamed:#"spinner-4.png"],
[UIImage imageNamed:#"spinner-5.png"],
[UIImage imageNamed:#"spinner-6.png"],
[UIImage imageNamed:#"spinner-7.png"],
[UIImage imageNamed:#"spinner-8.png"],[UIImage imageNamed:#"spinner-9.png"],nil];
loading.animationDuration = 1.0f;
loading.animationRepeatCount = 0;
[loading startAnimating];
[self.view addSubview:loading];
loadingText = [[UILabel alloc]initWithFrame:CGRectMake(90, 240, 200, 40)];
loadingText.text = #"loading salon";
[loadingText setFont:GOTHIC_FONT(22)];
[loadingText setTextColor:[UIColor whiteColor]];
[self.view addSubview:loadingText];
articles=[Model getArticles];
}
- (void) getSalonDetails{
[[MyDataModel sharedDataModel] getSalonDetails];
}
This is the delegate method which is trying to set some fields hidden. This delegate is called when an NSURLSession call completes successfully. The control comes here as per logs but nothing gets hidden. When I add a breakpoint and inspect the fields, every object is shown as nil. If this class is used as the main view controller, I've found everything works. On making it a child view, nothing works.
-(void)salonDetailsRecievedDelegate:(BOOL)success andStatusCode:(int)statusCode{
[loading stopAnimating];
self.loading.hidden = YES;
self.loadingText.hidden = YES;
saloonLabel.text = #"this is texT";
if(success){
//
}
}

Answer 1

What I think here is that salonDetailsRecievedDelegate isn't called from the main thread, try any of the following:
1) call it in the main thread from your model as follows:
dispatch_async(dispatch_get_main_queue(), ^{
[self.delegate salonDetailsRecievedDelegate:success andStatusCode:status];
});
2) change its implementation as follows:
-(void)salonDetailsRecievedDelegate:(BOOL)success andStatusCode:(int)statusCode{
dispatch_async(dispatch_get_main_queue(), ^{
[loading stopAnimating];
self.loading.hidden = YES;
self.loadingText.hidden = YES;
saloonLabel.text = #"this is texT";
if(success){
//
}
});
}