Question

I’m trying to implement a simple char count of an UITextView while the user is typing in text (i.e. it should update continuously).

I have two problems.

(1) The first is that I don’t know in which method I should put my charCount method. textViewShouldBeginEditing doesn’t work, as it simply asks if an editing session should begin. textView:shouldChangeTextInRange doesn’t work either, as it again asks if it is permitted to begin editing. I couldn’t find other useful methods in the Apple doc.

(2) Next problem: I tried to call my charCount method from within another method. But I get the compiler error: ‘ViewController’ may not respond to ‘charCount’.

Here is my humble attempt:

- (IBAction)charCount:(id)sender {

// all chars
int charsAsInt = (int)(textView.text.length);
NSString *newText = [[NSString alloc] initWithFormat:@"All chars: %d", charsAsInt];
allCharacters.text = newText;
[newText release];}

- (BOOL)textViewShouldBeginEditing:(UITextView *)aTextView {

    [self charCount];}

I guess it has to do with me trying to call a IBAction defined method that this won’t work. But what would be the proper way to call a IBAction method from within a non-IBAction method?

As always, I’m sorry for these very basic questions and I do appreciate every little help to get my beginner’s mind around this.

Answer 1

I used to create like this, for prevent UITextview to type only 140 characters.
And i shown that count in UILabel like this

-(void)textViewDidChange:(UITextView *)textView 
{
   int len = textView.text.length;
   lbl_count.text=[NSString stringWithFormat:@"%i",140-len];
}

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
    if([text length] == 0)
    {
        if([textView.text length] != 0)
        {
            return YES;
        }
    }
    else if([[textView text] length] > 139)
    {
        return NO;
    }
    return YES;
} 

this may help for you!!!