UITextField highlight text when user taps space

Question

I have a UITextField which i let user write tags as we do in stackoverflow. What i really want is exactly what stackoverflow does,with a slight difference which is to detect user's touch space button in keyboard.Well,stackoverflow searches instantaneously and display results.Instead i want user to tap space button. Do u guys have any idea,any tutorial that i can benefit from ? I'm sure i'm going to use UITextFieldDelegate method which is

-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string

But i don't know how to highlight the words before user starts to tap another word .

Answer 1

To get text highlighted u will have to use NSAttributestring and for that u will have use UITextView that supports NSAttributestring.

Refer EGOTextView link that supports NSAttributestring

Do like this to detect space in UITextField like this:

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
     NSString *lastCharacter = [string substringWithRange:NSMakeRange([string length]-1, 1)];
     if([lastCharacter isEqualToString:@" "])
     {
         //space button pressed
     }
     else
     { 
         // continue
     }
}