Programmatically switch keyboard from uppercase to lowercase

Question

I would like to turn my user's keyboard from uppercase to lowercase to force typing in lower-case. How can I do this?

You could get the UIWindow containing the keyboard and use several very very illegal quartz APIs to simulate a touch down in the general vicinity of the caps key. Or, just let iOS' text controls handle it by setting it's `capitalizationType` as appropriate. Take yer pick. — CodaFi, Mar 11 '13 at 22:16
@CodaFi the problem is that when I call `textView shouldChangeTextInRange` and use my custom methods to update the textView and then `return NO;` the code is never called to turn off the caps key after the first key is pressed (like capitalizing the first letter of a sentence). So I need to do my custom method, over-ride iOS from adding the text that the user typed and then still return all of the other methods. — Albert Renshaw, Mar 11 '13 at 22:39
possible duplicate of [First letter in UiTextField lowercase](http://stackoverflow.com/questions/5562910/first-letter-in-uitextfield-lowercase). You're over complicating things, and that's never good. — CodaFi, Mar 11 '13 at 22:42

score 6 · Answer 1 · answered Mar 11 '13 at 22:30

Instead of trying to force the keyboard into lower-case, just force the characters to lower-case after the user types them.

You didn't say whether you're using a UITextField or a UITextView. Let's suppose you're using a UITextField.

Declare your view controller to adopt the UITextFieldDelegate protocol, and set the delegate of the text field to the view controller.

In the view controller, implement this method:

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
    string = [string lowercaseString];
    textField.text = [textField.text stringByReplacingCharactersInRange:range
        withString:string];
    return NO;
}

If you are using a UITextView, adopt the UITextViewDelegate protocol and implement the textView:shouldChangeTextInRange:replacementText: method.

score 3 · Answer 2 · answered Apr 20 '15 at 04:02

3

textField.autocapitalizationType = UITextAutocapitalizationTypeNone;

answered Apr 20 '15 at 04:02

Say2Manuj

709
10
20

score 2 · Answer 3 · answered Mar 11 '13 at 22:13

2

What you can do is make the string of the text box lowercase after they close the keyboard. For example,

[sender resignFirstResponder];
textField.text = textField.text.lowercaseString;

This makes the text lowercase when they close the keyboard, which does what you want.

answered Mar 11 '13 at 22:13

Chris Loonam

5,735
6
41
63

This will be good, except, the way I am changing their text right now forces the caps lock to turn on after every key they press... however the user may want some letter capitalized but as of now wether or not they turn it on or off it will get forced on after each key is pressed. – Albert Renshaw Mar 11 '13 at 22:36

score 0 · Answer 4 · answered Oct 04 '17 at 08:02

0

textField.autocapitalizationType = .none

for swift

answered Oct 04 '17 at 08:02

Quiet Islet

536
1
8
28

Programmatically switch keyboard from uppercase to lowercase

4 Answers4