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POHow can I enable/disable a UITextField's inputAccessoryView buttons?
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copied!<p>I've created a UIToolBar as an inputAccessoryView with a next and previous buttons that will cycle through the textFields in my view controller.</p> <p>I've created a category on UITextField based on the <a href="https://stackoverflow.com/questions/1347779/how-to-navigate-through-textfields-next-done-buttons">third SO answer on this page</a> which adds a property to the textField that points to the next/previous textField.</p> <p>I can get it to cycle through the textFields both forward and backward, but only once, and then my buttons are permanently disabled. Also, when the last textField is in focus, I still need to tap the next button one extra time (4 taps for 3 textFields) to have it disable the next button — same with the previous button, I have to tap back once when I'm in the first textField. </p> <pre><code>// ViewController.h @interface DetailViewController : UIViewController <UINavigationControllerDelegate, UIImagePickerControllerDelegate, UITextFieldDelegate, UIPopoverControllerDelegate> { __weak IBOutlet UITextField *valueField; __weak IBOutlet UITextField *nameField; __weak IBOutlet UITextField *serialNumberField; } @property (nonatomic, strong) UITextField *currentTextField; - (IBAction)nextTextField:(id)sender; - (IBAction)prevTextField:(id)sender; // ViewController.m - (void)viewDidLoad { //... nameField.delegate = self; nameField.nextTextField = serialNumberField; nameField.prevTextField = nil; serialNumberField.delegate = self; serialNumberField.nextTextField = valueField; serialNumberField.prevTextField = nameField; valueField.delegate = self; valueField.prevTextField = serialNumberField; valueField.nextTextField = nil; //... } - (void)viewWillAppear:(BOOL)animated { //UIToolBar for inputAccessoryView UIToolbar *toolBar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 50)]; UIBarButtonItem *nextField = [[UIBarButtonItem alloc] initWithTitle:@"\U00003009" style:UIBarButtonItemStylePlain target:self action:@selector(nextTextField:)]; UIBarButtonItem *prevField = [[UIBarButtonItem alloc] initWithTitle:@"\U00003008" style:UIBarButtonItemStylePlain target:self action:@selector(prevTextField:)]; UIBarButtonItem *space = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil]; UIBarButtonItem *done = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(backgroundTapped:)]; NSArray *toolBarButtons = @[prevField, nextField, space, done]; toolBar.items = toolBarButtons; nameField.inputAccessoryView = toolBar; valueField.inputAccessoryView = toolBar; serialNumberField.inputAccessoryView = toolBar; } - (IBAction)nextTextField:(id)sender { UITextField *next = self.currentTextField.nextTextField; if (!next) { [sender setEnabled:NO]; } else { [sender setEnabled:YES]; [next becomeFirstResponder]; } } - (IBAction)prevTextField:(id)sender { UITextField *prev = self.currentTextField.prevTextField; if (!prev) { [sender setEnabled:NO]; } else { [sender setEnabled:YES]; [prev becomeFirstResponder]; } } </code></pre>

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