Objective c - Multiple colors in a label - ios

Question

What is the easiest way to have a label with different colors?
For example I want to present the message:
"John Johnson sent you a message"
But I want that John Johnson will be in blue color
and the rest of the message in black color.

Answer 1

You need the NSAttributedString class (or the mutable one - NSMutableAttributedString) in order to set attributes (for example, font and kerning) that apply to individual characters or ranges of characters in the string and a custom label control that can visualize NSAttributedString like TTTAttributedLabel.

Answer 2

In UILabel basically impossible. If you want to this you must override drawTextInRect should be executed. But I will recommend OHAttributedLabel. this is have a attributedString is a textcolor can be set to specify a range.

Answer 3

Use a UIWebView.
webView.text =
#"<span style:\"color:blue;\">John Johnson</span> sent you a message.";

Answer 4

Use CoreText. Hope this helps.

Answer 5

I created an UILabel extension to do this. Basically what it does is use NSAttributedString to define the color for some particular range: https://github.com/joaoffcosta/UILabel-FormattedText
If you wish to implement this behavior yourself, just do the following:
NSMutableAttributedString *text = [[NSMutableAttributedString alloc] initWithAttributedString: #"John Johnson sent you a message"];
[text addAttribute: NSFontAttributeName
value: font
range: range];
[self setAttributedText: text];

Answer 6

Try this with swift (execute code with following extension)
extension NSMutableAttributedString {
func setColorForText(textToFind: String, withColor color: UIColor) {
let range: NSRange = self.mutableString.range(of: textToFind, options: .caseInsensitive)
self.addAttribute(NSAttributedStringKey.foregroundColor, value: color, range: range)
}
}
Try an extension with UILabel:
let label = UILabel()
label.frame = CGRect(x: 40, y: 100, width: 280, height: 200)
let stringValue = "John Johnson sent you a message" // or direct assign single string value like "firstsecondthird"
label.textColor = UIColor.lightGray
label.numberOfLines = 0
let attributedString: NSMutableAttributedString = NSMutableAttributedString(string: stringValue)
attributedString.setColorForText(textToFind: "John Johnson", withColor: UIColor.blue)
label.font = UIFont.systemFont(ofSize: 26)
label.attributedText = attributedString
self.view.addSubview(label)
Here is result: