UILabel Text with Multiple Font Colors

问题:

Is there a way to have the textColor property of a UILabel be two different UIColors? Basically I'm trying to make the first character in the UILabel text property to be greenColor and the rest be blackColor. I would like to avoid using two different UILabels because I may want to change the position in the text of the green character.

回答1:

UILabel doesnot supprt this property...

Use should use NSAttributedString... and use controllers for drawing NSAttributesString...

Controller for NSAttributedString

UPDATE:

From iOS 6 you can do the following :

label.attributedText = attributedString;

回答2:

Starting from ios 6 you can do the following :

NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc]  initWithString:string];
[attributedString addAttribute:NSBackgroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(0,3)];
[attributedString addAttribute:NSForegroundColorAttributeName value:[UIColor blackColor] range:NSMakeRange(4,9)];
cell.label.attributedText = attributedString;

回答3:

NSAttributedStrings support mixed fonts, styles, and colors in the same string, but aren't currently supported by any standard UIKit controls. That said, you should check out TTTAttributedLabel. It's a simple, performant replacement for UILabel that will allow you to display rich text really easily.

回答4:

Swift 3:

extension NSMutableAttributedString {
        func setColorForText(textToFind: String, withColor color: UIColor) {
         let range: NSRange = self.mutableString.range(of: textToFind, options: .caseInsensitive)
          if range != nil {
            self.addAttribute(NSAttributedStringKey.foregroundColor, value: color, range: range)
          }
        }

}


func setColoredLabel() {
        var string: NSMutableAttributedString = NSMutableAttributedString(string: "My label with red blue and green colored text")
        string.setColorForText(textToFind: "red", withColor: UIColor.red)
        string.setColorForText(textToFind: "blue", withColor: UIColor.blue)
        string.setColorForText(textToFind: "green", withColor: UIColor.green)
        mylabel.attributedText = string
    }

Result:

回答5:

No - Apple say you should use HTML in a UIWebView if you need formatted text. (See the note in the overview section of the UITextView API docs.)

回答6:

Another alternative way is to create multiple labels with difference color and layout them next to each other. Try to make the label's background color transparent. It may be tedious but should work.

回答7:

No, that's not possible - you need to draw on your own or compose using several labels.

If you can accept 3.2 compatibility, you might have a look at NSAttributedString.

回答8:

not currently possible, usually you would use an NSAttributedString, but to use this on iOS you would need to roll your own label. you may be able to work round this using a UIWebView, but I don't like to do that, it seems heavy handed.