Use of undeclared identifier 'startClient' ERROR - ios

Question

I am writing an application in Objective C and I keep getting a Use of Undeclared Identifier 'startClient' error. I have attached a link to my project file and the tutorial link is here: https://www.sinch.com/tutorials/building-one-button-app-conference-calling/
https://drive.google.com/file/d/0B5loU41SFmzDZ2RNbWJsR0xoSk0/view?usp=sharing
The relevant portion of my code is here...
#import <QuartzCore/QuartzCore.h>
#import "ConferenceViewController.h"
#import "LoginViewController.h"
#import <SinchCallingUIKit/SinchCallingUIKit.h>
#class ConferenceViewController;
#interface UIView ()
#end
#implementation ConferenceViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (void)viewDidAppear:(BOOL)animated
{
- (void)startClient {}{
NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
[[CallingManager sharedManager] startClientWithKey:8b6893bf-41c6-4527-bc68-9d3703c13be3 secret:Ox18uwq7gkiAdeQYzntN6A== userName:[defaults stringForKey:#"userName"] sandbox:NO launchOptions:nil];
NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
if ([defaults stringForKey:#"userName"] == nil)
{
[self performSegueWithIdentifier:#"login" sender:nil];
}
else
{
[self startClient];
}
}

Answer 1

You can't stick a function inside another function. You have the implementation of startClient inside of viewDidAppear.
I don't know what your viewDidAppear is supposed to do, but this will compile:
- (void)viewDidAppear:(BOOL)animated
{
if ([defaults stringForKey:#"userName"] == nil)
{
[self performSegueWithIdentifier:#"login" sender:nil];
}
else
{
[self startClient];
}
}
- (void)startClient
{
NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
[[CallingManager sharedManager] startClientWithKey:8b6893bf-41c6-4527-bc68-9d3703c13be3 secret:Ox18uwq7gkiAdeQYzntN6A== userName:[defaults stringForKey:#"userName"] sandbox:NO launchOptions:nil];
}