Yes, many people are saying about Rich Text in iPhone/iPad and many knows about NSAttributedString.
But how to use NSAttributedString? I searched for much time, no extract clues for this.
I know how to set up a NSAttributedString, then what should I do to display a text on iPhone/iPad with rich text?
The official docs says it should be used with CoreText.Framework, what does that mean?
Is there any simple way like this?
NSAttributedString *str;
.....
UILabel *label;
label.attributedString = str;
You should take a look at AliSoftware's OHAttributedLabel. It is a subclass of UILabel that draws an NSAttributedString and also provides convenience methods for setting the attributes of an NSAttributedString from UIKit classes.
From the sample provided in the repo:
#import "NSAttributedString+Attributes.h"
#import "OHAttributedLabel.h"
/**(1)** Build the NSAttributedString *******/
NSMutableAttributedString* attrStr = [NSMutableAttributedString attributedStringWithString:@"Hello World!"];
// for those calls we don't specify a range so it affects the whole string
[attrStr setFont:[UIFont systemFontOfSize:12]];
[attrStr setTextColor:[UIColor grayColor]];
// now we only change the color of "Hello"
[attrStr setTextColor:[UIColor redColor] range:NSMakeRange(0,5)];
/**(2)** Affect the NSAttributedString to the OHAttributedLabel *******/
myAttributedLabel.attributedText = attrStr;
// Use the "Justified" alignment
myAttributedLabel.textAlignment = UITextAlignmentJustify;
// "Hello World!" will be displayed in the label, justified, "Hello" in red and " World!" in gray.
Note: In iOS 6+ you can render attributed strings using the attributedText property of UILabel.