Is it possible to change color of single word in UITextView and UITextField

by

Yes you need to use NSAttributedString for that, find the RunningAppHere.

Scan through the word and find the range of your word and change its color.

EDIT:

- (IBAction)colorWord:(id)sender {
    NSMutableAttributedString * string = [[NSMutableAttributedString alloc]initWithString:self.text.text];

    NSArray *words=[self.text.text componentsSeparatedByString:@" "];

    for (NSString *word in words) {        
        if ([word hasPrefix:@"@"]) {
            NSRange range=[self.text.text rangeOfString:word];
            [string addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:range];           
        }
    }
    [self.text setAttributedText:string];
}

EDIT 2 : see the screenshot
enter image description here

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