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iOS

Posted by Kalle Kod
Kalle Kod
37 Points

Force user to enter text

Can I forse a user to enter a textfield to click save?

10 Answers

Cameron Armstrong
Cameron Armstrong
9,406 Points
Cameron Armstrong
Cameron Armstrong
9,406 Points

One method you can try is to have the save button disabled by default (self.yourButton.enabled = NO;) and use the UITextFieldDelegate protocol in your view controller header file to make it look something like this:

@interface YourViewController : UIViewController
<UITextFieldDelegate>

Then in your viewDidLoad method set the textfield's delegate to self:

self.yourButton.delegate = self;

And then implement this method:

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
    if ([self.textField.text isEqualToString:@""]) {
        self.button.enabled = NO;
    } else {
        self.button.enabled = YES;
    }
  return YES;
}

This code gets called as soon as you begin editing. So as soon as you begin typing, the button will get enabled. The only issue with this code is if you erase the textfield, the button will remain enabled unless you push the return button.

Cameron Armstrong
Cameron Armstrong
9,406 Points
Cameron Armstrong
Cameron Armstrong
9,406 Points

did you set all of those textfields to delegate = self at viewDidLoad? and did you put <UITextFieldDelegate> in the .h file?

Cameron Armstrong
Cameron Armstrong
9,406 Points
Cameron Armstrong
Cameron Armstrong
9,406 Points

Sorry. Can someone tell me how to get line breaks working? The code I pasted looks awful.

Kalle Kod
Kalle Kod
37 Points
Kalle Kod
Kalle Kod
37 Points

Thanks. But it dosent work for me. :(

Cameron Armstrong
Cameron Armstrong
9,406 Points
Cameron Armstrong
Cameron Armstrong
9,406 Points

Do you have the button and textfield in outlets?

Kalle Kod
Kalle Kod
37 Points
Kalle Kod
Kalle Kod
37 Points

This is my code. And I want the user to atleast fill up one of the fields

            <p>
    // Create PFObject with information
    PFUser *profile = [PFUser currentUser];
    [profile setObject:nameTextField.text forKey:@"name"];
    [profile setObject:titleTextField.text forKey:@"title"];
    [profile setObject:locationTextField.text forKey:@"location"];
    [profile setObject:phoneTextField.text forKey:@"contactPhone"];
    [profile setObject:emailTextField.text forKey:@"contactEmail"];
    [profile setObject:urlTextField.text forKey:@"contactUrl"];


    NSData *imageData = UIImageJPEGRepresentation(profileImageView.image, 0.8);
    NSString *filename = [NSString stringWithFormat:@"%@", nameTextField.text];


    PFFile *imageFile = [PFFile fileWithName:filename data:imageData];
    [profile setObject:imageFile forKey:@"profileimageFile"];



    // Show progress
    MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:self.view animated:YES];
    hud.mode = MBProgressHUDModeIndeterminate;
    hud.labelText = @"Uploading";
    [hud show:YES];

    // Upload to Parse
    [profile saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
        [hud hide:YES];




        if (!error) {
            // Show success message

            [self performSegueWithIdentifier:@"setupProfileText" sender:self];


        } else {
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Something Is Missing" message:@"Please enter all required fields" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
            [alert show];
        }
    }];

}

</p>
            ```
Kalle Kod
Kalle Kod
37 Points
Kalle Kod
Kalle Kod
37 Points

It is self.yourButton.delegate = self; i get error from. Any ideas?

YOL O!
YOL O!
57 Points
YOL O!
YOL O!
57 Points

Did you get it to work?

YOL O!
YOL O!
57 Points
YOL O!
YOL O!
57 Points

I would love to do something like that. But can get it to work either...

h

@property (strong, nonatomic) IBOutlet UIBarButtonItem *saveButton;

m

self.join.delegate = self;


      if(usernameTextField.text.length==0 && emailTextField.text.length==0 && emailTextField.text.length==0) isEqualToString:@""]) {

        self.join.enabled = NO;
    } else {
        self.join.enabled = YES;


        {
            [[[UIAlertView alloc] initWithTitle:@"" message:@"Please Fill Atleast One Field" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]show];

            {



                if(phoneTextField.text.length==0 && emailTextField.text.length==0 && urlTextField.text.length==0)
                {
                    [[[UIAlertView alloc] initWithTitle:@"" message:@"Please Fill Atleast One Field" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]show];

                }

                else{

                    [self performSegueWithIdentifier:@"setupProfileText" sender:self];

                }

            }

        }
    }];

    ```
YOL O!
YOL O!
57 Points
YOL O!
YOL O!
57 Points

I cant get it to work :( Cameron Armstrong