How do I switch views after signing up and logging in? - objective-c

Question

So the backend is working, I can successfully create accounts and login. Now I want them to transition to the home screen so how I do I set so if the sigup/login is successful it transitions? This is my code:
- (IBAction)signUp:(UIButton *)sender {
NSString *name = _textUsername.text;
NSString *password = _textPassword.text;
NSString *email = [_textEmail.text lowercaseString];
//---------------------------------------------------------------------------------------------------------------------------------------------
if ([name length] == 0) { [ProgressHUD showError:#"Name must be set."]; return; }
if ([password length] == 0) { [ProgressHUD showError:#"Password must be set."]; return; }
if ([email length] == 0) { [ProgressHUD showError:#"Email must be set."]; return; }
//---------------------------------------------------------------------------------------------------------------------------------------------
[ProgressHUD show:#"Please wait..." Interaction:NO];
PFUser *user = [PFUser user];
user.username = name;
user.password = password;
user.email = email;
user[PF_USER_EMAILCOPY] = email;
user[PF_USER_FULLNAME] = name;
user[PF_USER_FULLNAME_LOWER] = [name lowercaseString];
[user signUpInBackgroundWithBlock:^(BOOL succeeded, NSError *error)
{
if (error == nil)
{
ParsePushUserAssign();
[ProgressHUD showSuccess:#"Succeed."];
[self dismissViewControllerAnimated:YES completion:nil];
}
else [ProgressHUD showError:error.userInfo[#"error"]];
}];
Also any idea why my text field doesn't automatically go to the next one? Pretty sure the code is right. Thanks.
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
if (textField == _textUsername)
{
[textField resignFirstResponder];
[_textEmail becomeFirstResponder];
}
else if (textField == _textEmail)
{
[textField resignFirstResponder];
[_textPassword becomeFirstResponder];
}
else if (textField == _textPassword)
{
[textField becomeFirstResponder];
[_textBirthday becomeFirstResponder];
}
else if (textField == _textBirthday)
{
[self actionRegister];
}
return YES;

Answer 1

The way I arrange my parse.com apps is to have the main VC, the one that does the app's usual business for a logged-in user, be the storyboard's starting VC. It's first job in viewDidAppear, is to check that the PFUser currentUser exists (and is logged-in if your app requires it). If it isn't, then and only then, present the login/signup VC.
When login/signup dismisses as you have it in the posted code, viewWillAppear in your main VC fires again and detects the ready-to-run condition. It's action in that case is to carry on with initialization for a logged in user.
EDIT - For example, I have an app where the main VC is the starting VC in storyboard. It has a segue with identifier == #"GetUser" drawn from it to my equivalent of your signup/login VC.
Here's the (slightly simplified) viewDidAppear from my main VC.
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
// I require only a non-nil currentUser to run the app. Your check
// might be more elaborate...
PFUser *user = [PFUser currentUser];
if (user) {
// put up a "busy" UI. In my app, it's just a view with UIActivityIndicator
// update the user so we know its current
[user fetchInBackgroundWithBlock:^(PFObject *object, NSError *error) {
// remove the "busy" UI
[self startTheApp];
}];
} else {
[self performSegueWithIdentifier:#"GetUser" sender:self];
}
}
-(void)startTheApp {
// fetch data from parse.com and reload the table view that's the
// centerpiece of the UI for this VC.
}
The nice behavior here is when the login/signup succeeds, the currentUser is non-nil, so when the login/signup VC is dismissed, viewDidAppear as shown above is fired again because the main VC underneath is being revealed again. And on that second time through, the currentUser passes the starting condition and we go to startTheApp.