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    <p>Sorted! I simply use a 1x1px text view and use the delegate method <code>textViewDidChangeSelection:</code></p> <p><strong>EDIT: For iOS 6 I had to change the text view to 50x50px (or at least enough to actually display text) for this to work</strong></p> <p>I also managed to suppress the on-screen keyboard when the pedal is disconnected.</p> <p>This is my code in viewDidLoad:</p> <pre><code>[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillAppear:) name:UIKeyboardWillShowNotification object:nil]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillDisappear:) name:UIKeyboardWillHideNotification object:nil]; UITextView *hiddenTextView = [[UITextView alloc] initWithFrame:CGRectMake(0, 0, 50, 50)]; [hiddenTextView setHidden:YES]; hiddenTextView.text = @"aa"; hiddenTextView.delegate = self; hiddenTextView.selectedRange = NSMakeRange(1, 0); [self.view addSubview:hiddenTextView]; [hiddenTextView becomeFirstResponder]; if (keyboardShown) [hiddenTextView resignFirstResponder]; </code></pre> <p><code>keyboardShown</code> is declared as a <code>bool</code> in my header file.</p> <p>Then add these methods:</p> <pre><code>- (void)textViewDidChangeSelection:(UITextView *)textView { /******TEXT FIELD CARET CHANGED******/ if (textView.selectedRange.location == 2) { // End of text - down arrow pressed textView.selectedRange = NSMakeRange(1, 0); } else if (textView.selectedRange.location == 0) { // Beginning of text - up arrow pressed textView.selectedRange = NSMakeRange(1, 0); } // Check if text has changed and replace with original if (![textView.text isEqualToString:@"aa"]) textView.text = @"aa"; } - (void)keyboardWillAppear:(NSNotification *)aNotification { keyboardShown = YES; } - (void)keyboardWillDisappear:(NSNotification *)aNotification { keyboardShown = NO; } </code></pre> <p>I hope this code helps someone else who is looking for a solution to this problem. Feel free to use it.</p>
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    1. POHow can I respond to external keyboard arrow keys?
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    1. COWorked great for me, but I had to put the initialization code in viewDidAppear not viewDidLoad.
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    2. COI think this leads to an infinite loop, because setting `selectedRange` property (in `textViewDidChangeSelection`) triggers another `textViewDidChangeSelection`, although this idea really helped me.
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      1. USBianca D.
    3. COIt won't cause an infinite loop, as `selectedRange` is only set if the cursor location is 0 or 2.
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