使用NSMutableAttributedString更改NSString的颜色和大小部分

Question

Browsed through a few NSAttributedString examples but can't seem to get this working. I am trying to change the size and color of part of a NSMutableAttributedString .

I've tried a few variations of this:

NSMutableAttributedString *hintText = [[NSMutableAttributedString alloc] initWithString:@"This is red and huge and this is not"];

//Black and large
[hintText setAttributes:@{NSFontAttributeName:[UIFont fontWithName:@"Futura-Medium" size:20.0f], NSForegroundColorAttributeName:[UIColor blackColor]} range:NSMakeRange(0, 11)];

//Rest of text -- just futura
[hintText setAttributes:@{NSFontAttributeName:[UIFont fontWithName:@"Futura-Medium" size:16.0f]} range:NSMakeRange(12, ((hintText.length -1) - 12))];

This just changes the size of the text, not the color. Can someone point me in the right direction?

EDIT: I use this like so: myUILabel.attributedText = hintText ;

Answer 1

When I'm trying to do something like this, I find it to be easier to build individual pieces (each of which is an NSAttributedString ) and then "glue" them together with something like the following:

NSAttributedString *string1 = // Get the red and large string here
NSAttributedString *string2 = // Get the just futura string here

NSMutableAttributedString *hintText = [[NSMutableAttributedString alloc] init];
[hintText appendAttributedString:string1];
[hintText appendAttributedString:string2];

I find this makes it much easier to follow the logical flow and I've never found this way to have performance limitations that needed optimization.

---

Update:

FWIW, I got the following code to work as I believe the OP desires:

 - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. NSMutableAttributedString *hintText = [[NSMutableAttributedString alloc] initWithString:@"This is red and huge and this is not"]; //Red and large [hintText setAttributes:@{NSFontAttributeName:[UIFont fontWithName:@"Futura-Medium" size:20.0f], NSForegroundColorAttributeName:[UIColor redColor]} range:NSMakeRange(0, 20)]; //Rest of text -- just futura [hintText setAttributes:@{NSFontAttributeName:[UIFont fontWithName:@"Futura-Medium" size:16.0f]} range:NSMakeRange(20, hintText.length - 20)]; [self.button setAttributedTitle:hintText forState:UIControlStateNormal]; } 

Note that he was specifying [UIColor blackColor] and I updated that to [UIColor redColor] . Also, I updated the range calculations to include all of the characters in "This is red and huge".