文字颜色

你可以使用标签的 textColor 属性将文本颜色应用于标签的整个文本。

迅速

label.textColor = UIColor.redColor()
label.textColor = UIColor(red: 64.0/255.0, green: 88.0/255.0, blue: 41.0/225.0, alpha: 1)

Swift 3

label.textColor = UIColor.red
label.textColor = UIColor(red: 64.0/255.0, green: 88.0/255.0, blue: 41.0/225.0, alpha: 1)

Objective-C

label.textColor = [UIColor redColor];
label.textColor = [UIColor colorWithRed:64.0f/255.0f green:88.0f/255.0f blue:41.0f/255.0f alpha:1.0f];

将文本颜色应用于文本的一部分

你还可以使用 NSAttributedString 改变文本部分的文本颜色（或其他属性） ：

Objective-C

attributedString = [[NSMutableAttributedString alloc] initWithString:@"The grass is green; the sky is blue."];
[attributedString addAttribute: NSForegroundColorAttributeName value:[UIColor greenColor] range:NSMakeRange(13, 5)];
[attributedString addAttribute: NSForegroundColorAttributeName value:[UIColor blueColor] range:NSMakeRange(31, 4)];
label.attributedText = attributesString;

迅速

let attributedString = NSMutableAttributedString(string: "The grass is green; the sky is blue.")
attributedString.addAttribute(NSForegroundColorAttributeName, value: UIColor.green(), range: NSRange(location: 13, length: 5))
attributedString.addAttribute(NSForegroundColorAttributeName, value: UIColor.blue(), range: NSRange(location: 31, length: 4))
label.attributedText = attributedString