How to check for return key tap in text view?

Question

Created Dec ’19

Replies 6

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How would I check for a return key tap on the keyboard when a text view is first responder? So far I think I have to check the text parameter in the shouldChangeTextIn callback method of UITextViewDelegate. How would I check whether text is a return?

Answered by PBK in 400376022

A UITextView has a delegate. The delegate has the method textViewDidChange: Look at the last character and determine if it is "\n"

Use this type of code:

-(void)textViewDidChange:(UITextView *)textView{
    if(textView.text.length>1)
         if([[textView.text substringFromIndex:textView.text.length-1] isEqualToString:@"\n"]){
             //  the textView text ended with a return character
         }
}

Boost

Answer 1

DelawareMathGuy OP

Dec ’19

hi,

you might want to look back on "Understanding UITextView Input." there's discussion there about the shouldChangeTextIn method and, what i think, is the suggestion to avoid asking for checking specifically about a return key tap.

hope that helps,

DMG

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Answer 2

Claude31 OP

Dec ’19

Did you try to set "Auto enable return key" ON in IB ?

That's in the Text Input Traits section of Attributes Inspector.

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Answer 3

ShinehahGnolaum OP

Dec ’19

Yes. I am not sure what that does. I can't find documentation on it.

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Answer 4

ShinehahGnolaum OP

Dec ’19

I found the documentation. That's not what I need.

0

Answer 5

PBK OP

Dec ’19

Accepted Answer

A UITextView has a delegate. The delegate has the method textViewDidChange: Look at the last character and determine if it is "\n"

Use this type of code:

-(void)textViewDidChange:(UITextView *)textView{
    if(textView.text.length>1)
         if([[textView.text substringFromIndex:textView.text.length-1] isEqualToString:@"\n"]){
             //  the textView text ended with a return character
         }
}

0

Answer 6

benst OP

Sep ’22

Use the UITextFieldDelegate and implement textFieldShouldReturn. It is called when the user presses the return key on the keyboard.

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