How to highlight the text \"cell phone\" in the image?
Updated
Use NSMutableAttributedString
this might work for you.
NSString *myString = @"Hello";
NSMutableAttributedString *aString = [[NSMutableAttributedString alloc] initWithString:myString];
NSRange theRange = NSMakeRange(0,[aString length]);
//Here we are setting foreground and background color to text for highlighting it.
[aString addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"MyriadPro-Bold" size:17.5f] range:theRange];
[aString addAttribute:NSForegroundColorAttributeName value:[UIColor purpleColor] range:theRange];
[aString addAttribute:NSBackgroundColorAttributeName value:[UIColor yellowColor] range:theRange];
//You can change the range depending upon what portion of text you want to highlight.