Taking user input from UITextField and saving as string in ViewController without using segues

Question

I have looked all over the internet for an answer to this question and I have tried multiple different suggested ways but it still won't work.

I have a single UIViewController with a UITextField and two UIButtons. One to save the input as a string and another to segue into another view. In other view I just have a UILabel. All I want to do is take the text the user input, save it as a string in the second UIViewController and then be able to display it. The trick is that I don't want to have to use segues.

This is my code:

ViewController.m

#import "ViewController.h"
#import "SecondViewController.h"

@interface ViewController ()

@end

@implementation ViewController

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

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

- (IBAction)save:(id)sender {


SecondViewController *detailViewController = [[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil];

detailViewController.str = _TextField.text;

[self.TextField resignFirstResponder];
}
@end

SecondViewController.h

@interface SecondViewController : UIViewController

@property (nonatomic, retain) NSString *str;

@property (weak, nonatomic) IBOutlet UILabel *Label;

@end

SecondViewController.m

#import "SecondViewController.h"

@interface SecondViewController ()

@end

@implementation SecondViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
    // Custom initialization
}
return self;
}

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

[_Label setText:_str];
}

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

If someone could tell me what is wrong with the code that would be really helpful. When I run the app and type in text, then go to SecondView the label will show up empty.

The problem might with your buttons. You'r about to assign in one action and just segue with another, right ? .. — Kumar KL, Jul 22 '14 at 04:49
Yeah, I have one button linked to IBAction, that is the save button, and then I linked the other button, next, to segue to the SecondViewController — user3863053, Jul 22 '14 at 04:51
that's the reason, here actually when you'r about to segue the viewController gets re-initialised, so the str could be empty — Kumar KL, Jul 22 '14 at 04:55
Sorry, I am relatively new to xcode, could you give me a piece of sample code? And where I should add that method — user3863053, Jul 22 '14 at 05:02

score 0 · Answer 1 · answered Jul 22 '14 at 04:24

0

In this function you also do pushView Controller

- (IBAction)save:(id)sender {

     SecondViewController *detailViewController = [[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil];
    detailViewController.str = _TextField.text;
    [self.navigationController pushViewController:detailViewController animated:NO];
    [self.TextField resignFirstResponder];
}

try this may be helpfull..

answered Jul 22 '14 at 04:24

Jogendra.Com

6,394
2
28
35

I added the pushViewController to my code and it didn't make any difference. When I push the save button the keyboard is dismissed, and then when I press the button to go to the next view it still showed up empty. – user3863053 Jul 22 '14 at 04:35
So I added this in ViewController: NSLog(@"%@", detailViewController.str); And this in SecondViewController: NSLog(@"%@", self.str); In ViewController it came up as my string but in SecondViewController it came up null – user3863053 Jul 22 '14 at 04:44
try to clean project and build again .. Because code is correct. – Jogendra.Com Jul 22 '14 at 04:47
I did a clean build and it didn't work. Does it matter if my views are embedded in a Navigation controller? And does it matter how I set up the segue? – user3863053 Jul 22 '14 at 04:54
does matter of segue only – Kumar KL Jul 22 '14 at 04:56

score 0 · Accepted Answer · edited May 23 '17 at 12:21

0

The problem is with your segue,

No need to assign in one of the action, which is not responsible for the segue.

Just override this method

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    // Make sure your segue name in storyboard is the same as this line
    if ([[segue identifier] isEqualToString:@"YOUR_SEGUE_NAME_HERE"])
    {
        SecondViewController *detailViewController = [[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil];
    detailViewController.str = _TextField.text;
    }
}

The trick is that I don't want to have to use segues.

Then go with the NSUserDefaults -- Save string to the NSUserDefaults?

edited May 23 '17 at 12:21

Community

1
1

answered Jul 22 '14 at 05:05

Kumar KL

15,315
9
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60

If I wanted to save TextField.text to a ViewController other then the one that I am setting up the segue to, would this still work? In the original question I had said that I wanted to try and avoid having to send it through a segue – user3863053 Jul 22 '14 at 05:08
then just go with the `NSUserDefaults` – Kumar KL Jul 22 '14 at 05:09
Any chance you could show me what that would look like? – user3863053 Jul 22 '14 at 05:11
Thank you so much! I just got it to work! I have been working on this for almost a week now! – user3863053 Jul 22 '14 at 05:21

score 0 · Answer 3 · answered Jul 22 '14 at 05:06

- (IBAction)save:(id)sender {

 SecondViewController *detailViewController = [[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil];
detailViewController.str = _TextField.text;

[self.TextField resignFirstResponder];
}

I deleted this code [self.navigationController pushViewController:detailViewController animated:NO]; as this code prompts to push the view controller.

Hope this helps :)

Taking user input from UITextField and saving as string in ViewController without using segues

3 Answers3