NSAtributedString font

Question

How do I set the font for a NSAtributedString on the iPhone. I found online how to do it for the mac but it is not the same. When I tried to covert it to the iOS platform it didn't work. I need to set the font name and the font size.

 NSDictionary *attributes = [[NSDictionary alloc] initWithObjectsAndKeys:
                                [UIFont fontWithName:@"Helvetica" size:26], kCTFontAttributeName,
                                [UIColor blackColor], kCTForegroundColorAttributeName, nil];

Answer 1

Check out the code

infoString=@"This is an example of Attributed String";

NSMutableAttributedString *attString=[[NSMutableAttributedString alloc] initWithString:infoString];
NSInteger _stringLength=[infoString length];

UIColor *_black=[UIColor blackColor];
UIFont *font=[UIFont fontWithName:@"Helvetica-Bold" size:30.0f];
[attString addAttribute:NSFontAttributeName value:font range:NSMakeRange(0, _stringLength)];
[attString addAttribute:NSForegroundColorAttributeName value:_black range:NSMakeRange(0, _stringLength)];

Answer 2

The value for kCTFontAttributeName must be a CTFontRef, not a UIFont *. You can't directly convert a UIFont to a CTFont. You should be able to just use CTFontCreateWithName to create it. You will need to use CFRelease on it when you are done, to avoid a memory leak. Check out the CTFont Reference.

Also, the value for kCTForegroundColorAttributeName must be a CGColorRef, not a UIColor *. You can fix this easily by saying [UIColor blackColor].CGColor.

UPDATE

If you're using UIKit attributed string support (which was added in iOS 6.0), you can use the NSFontAttributeName key with a UIFont as the value. You can also use the NSForegroundColorAttributeName key with a UIColor value. See NSAttributedString UIKit Additions Reference.