twitter segue transition issue in iOS app - ios

I am integrating Twitter app in my iOS app. The problem is after successful login, the segue that should take the control to the specific view controller, return back to my login page and not to the desired view controller. The segue has been performed and i can see that in my output console. Also the wired thing is when i click the tweet button on login page, the segue performed second time visually at last.
My twitter login method is as follow:
- (IBAction)tweetbutton:(id)sender {
[SCTwitter initWithConsumerKey:#"your_consumer_key" consumerSecret:#"your_consumer_secret"];
[SCTwitter loginViewControler:self callback:^(BOOL success){
NSLog(#"Login is Success - %i", success);
if (success) {
[self performSegueWithIdentifier:#"authentication" sender:self];
}
}];
}
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
NSLog(#"prepareForSegue: %#", segue.identifier);
}
The output in console is:
2014-12-10 23:54:16.923 gems[1300:60b] Login is Success - 1
2014-12-10 23:54:16.946 gems[1300:60b] prepareForSegue: authentication
I don't understand where I am wrong and why segue is not performing automatically visually on login success. Please suggest a suitable solution so that direct automatic transition to specific view controller without getting back on Login page again and also for your knowledge I am using plain view controller and not navigation controller.
Thanks in advance. Any help would be appreciated.

Using Swift 3:
Use this in viewDidLoad():
Twitter.sharedInstance().logIn { (session, error) in
if error == nil {
performSegue(withIdentifier: "authentication", sender: self)
}
}

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Ios Parse Login

I am programming an IOS app that will use parse to login a user. Using storyboard I have the login button connected to another view controller with the push segue. Whether the username and password are correct the button selection always goes to the new view controller. I might be doing this all wrong. Any help is appreciated. Here is my code:
- (IBAction)signIn:(id)sender {
[PFUser logInWithUsernameInBackground:self.emailField.text password:self.passwordField.text block:^(PFUser *user, NSError *error) {
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[self performSegueWithIdentifier:#"signIn" sender:nil];
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I think the issue is that you connected the button right to the next view controller in your storyboard. Here's what you need to do:
Select the first view controller and create a segue to the second one, NOT from the button, from the first view controller.
In the inspector give the segue an identifier (i.e. "loginSegue").
Create an IBAction for your button by control-dragging the button in the storyboard to the .m file of your first view controller. In that new method you can add the login code:
[PFUser logInWithUsernameInBackground:self.emailField.text
password:self.passwordField.text block:^(PFUser *user, NSError *error)
{
if (!error) {
[self performSegueWithIdentifier:#"loginSegue" sender:nil];
} else {
// The login failed. Check error to see why.
}
}];

ios login screen issue

I've been developing an iOS app that includes a login screen. This screen has two UITextField where I input the username and the password.
Now, the issue recalls in the following: I've set up an "else if" to trigger an UIAlertView if the field are in blank.
The UIAlertView DOES pop up but... in the next View Controller.
Another issue is... It check if the username and the password are right or not and it jumps into the next View Controller as well.
This is odd because I set an "if" condition to check that the text in both UITextFields must match in order to trigger the next View Controller.
I've got the hunch that another method linked to the login action might be interfering in the process.
I will post the segment of the code concerning the login:
- (void)btn_submit:(id)sender{
NSString *user = self.usuari.text;
NSString *pass = self.contrasenya.text;
NSString * urlBase = #"http://www.v2msoft.com/clientes/lasalle/curs-ios/login.php?username=lluis&password=seguro";
[JSONHTTPClient getJSONFromURLWithString:urlBase completion:^(id json,JSONModelError *err){
JsonUser * user = [[JsonUser alloc]initWithDictionary:json error:nil];
if(user.succeed){
self.user_id = user.user_id;
[self performSegueWithIdentifier:#"Login" sender:self];
}
else{
NSLog(#"error");
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}];
}
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{
if (([self.usuari.text isEqualToString:#"lluis"]) && ([self.contrasenya.text isEqualToString:#"seguro"])){
Supermarket * supermercat = segue.destinationViewController;
supermercat.user_id = self.user_id;
}
else if (_usuari.text.length == 0 || _contrasenya.text.length == 0)
{
[[[UIAlertView alloc] initWithTitle:#"Alerta!"
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delegate: nil
cancelButtonTitle:#"Cancelar"
otherButtonTitles:nil
] show];
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And, also, the few lines of the "JsonUser" class:
#import "JSONModel.h"
#interface JsonUser : JSONModel
#property BOOL succeed;
#property int user_id;
I think that I might be making a mistake by sending the parameters to the server through the URL and that might override the login.
I'd appreciate any help or advice regarding this matter.
It is already too late for your check within prepareForSegue. If you had the chance to stop the presentation of the segue there the method would be called shouldPresentSegue or something like that. Perform your check (the else if) before you call performSegue.
whether u connect segue from submit button to next view controller or segue from login view to nextviewcontroller. Make Sure your segue only from login screen to nextviewcontroller not from submit button.

iOS ibaction code not being triggered due to segue in iOS

I am trying to trigger a segue and move to a new view based on the result of an asynchronous task.
I have setup the segue by connecting a button in my initial view and dragging to the next view. I have also setup an ibaction on the initial button that triggers the asynch task. I think these two things could possibly be in conflict.
my ibaction code looks like:
- (IBAction)buttonClicked:(id)sender {
NSLog(#"button clicked");
[user signUpInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
NSLog(#"in process");
if (!error) {
NSLog(#"succcess");
[self performSegueWithIdentifier:#"myid" sender:#"success"];
}else{
NSLog(#"failure");
}
}];
only the first button click log prints. The others do not.
My segue methods do not have any logic.
The segues fire without hitting the performSegue method above.
How can I control the segue transition methods from the button click?
How can I have the signup method be called and then have the segue fire?

Implementing conditional segue with custom delegate

I am using storyboard. It has a login VC , which on success pushes to another VC. When the user enters the credentials and clicked on login button then it hits the server. I have implemented all the logic that contains hitting with server in a separate class which has delegate. When we get response then the control goes to the delegate method implemented in login VC. In the delegate method if status is success then only the login VC must be pushed in to another VC.
In Login VC
- (BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender
{
Util *util = [[Util alloc]init];
util.delegate = self;
NSMutableDictionary *request = [[NSMutableDictionary alloc]init];
[request setValue:uname.text forKey:#“username”];
[request setValue:pwd.text forKey:#“password”];
[util body:request];
}
when server returns response it comes to the delegate method implemented in Login VC
- (void)response:(NSDictionary *)response
{
//here i am going to check the status if it is success i will go to new VC else in same VC
}
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Why don't you call
[self performSegueWithIdentifier:#"customerView" sender:self];
It looks like you're probably triggering your segue when the login button is tapped. You can't do this if you need to wait for a response from your web service. Instead, try connecting your button to a method when sends off your login request. When you receive your response, you can check if the user's login is valid, and then perform your segue programmatically:
- (void)response:(NSDictionary *)response
{
if (something) // check if response is valid
{
[self performSegueWithIdentifier:#"YourSegueIdentifier" sender:self];
}
else
{
// show error
}
}
This way, you won't need to implement shouldPerformSegueWithIdentifier:sender: at all.

How to disable modal segue iOS

I have an app having 7 screen. On the screen 7 i have a button that does valiation and submits data and then it jumps to screen 1 using modal segue.
But ,I only want to move screen1 if the validation succeeds or else i dont want to move to screen1.
Currently its moving to screen 1 independent of validation.
button click code is as below
- (IBAction)submitButtonActionForDemo:(id)sender
{
if (![JLTValidator validateFields:#[_authRepresentative, _acceptDeclarationStatement,_homeTeamRepName,_homeTeamRepPosition,_awayTeamRepName,_awayTeamRepPosition]])
{
// how to disable a modal segue here.
return;
}
}
JLTValidator is my validating class here.
Pls suggest/help. Thanks in adv.
If you want to only allow the segue some times, you need to "name" the segue in InterfaceBuilder, then implement this routine:
- (BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender {
if ([identifier isEqualToString:#"your segue name"]) {
return false;
}
return true;
}

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