How to set “NSBackgroundColorAttributeName” on TTTAttributedLabel, OHAttributedLabel or SETextView in Swift

问题

I'm trying to set NSBackgroundColorAttributeName attribute on TTTAttributedLabel, OHAttributedLabel or SETextView, but it's not work. Anyone have any idea? Sample code is followed.

class ViewController: UIViewController {

    @IBOutlet weak var textLabel: UILabel!
    @IBOutlet weak var ttLabel: TTTAttributedLabel!
    @IBOutlet weak var ohLabel: OHAttributedLabel!
    @IBOutlet weak var seTextView: SETextView!

    override func viewDidLoad() {
        super.viewDidLoad()

        var content: String = "This is Test."
        var text = NSMutableAttributedString(string: content)
        text.addAttribute(NSBackgroundColorAttributeName, value: UIColor.redColor(), range: NSMakeRange(0, text.length))
        textLabel.attributedText = text     // It's Work.
        ohLabel.attributedText = text       // It's not Work
        seTextView.attributedText = text    // It's not Work

        // It's not Work as well
        ttLabel.setText(content, afterInheritingLabelAttributesAndConfiguringWithBlock: {
            (attributedString) -> NSMutableAttributedString! in
            attributedString.addAttribute(NSBackgroundColorAttributeName, value: UIColor.redColor(), range: NSMakeRange(0, attributedString.length))
            //attributedString.addAttribute(kTTTBackgroundFillColorAttributeName, value: UIColor.yellowColor(), range: NSMakeRange(1, 3))
            return attributedString
        })
    }
}

In addition, I can set "NSForegroundColorAttributeName" on every label properly.

回答1:

Read this blog NSBackgroundcolorattributename and Apple Documentation of NSAttributedString_Class

Use this code..

import UIKit

class ViewController: UIViewController {
    @IBOutlet weak var myLabel: UILabel!
    var myString:NSString = "I Love Stackoverflow!"
    var myMutableString = NSMutableAttributedString()
    @IBAction func myFontButton(sender: UIButton) {
        myMutableString.addAttribute(NSFontAttributeName, value: UIFont(name: sender.titleLabel!.text!, size: 24.0)!, range: NSRange(location: 7,length: 5))
        myLabel.attributedText = myMutableString
    }
    override func viewDidLoad() {
        super.viewDidLoad()
        //Initialize the mutable string
        myMutableString = NSMutableAttributedString(string: myString, attributes: [NSFontAttributeName:UIFont(name: "Georgia", size: 18.0)!])

        //Add more attributes here:
        myMutableString.addAttribute(NSFontAttributeName, value: UIFont(name: "Chalkduster", size: 24.0)!, range: NSRange(location: 7,length: 5))
        myMutableString.addAttribute(NSFontAttributeName, value: UIFont(name: "AmericanTypewriter-Bold", size: 18.0)!, range: NSRange(location:2,length:4))
        myMutableString.addAttribute(NSForegroundColorAttributeName, value: UIColor.redColor(), range: NSRange(location:2,length:4))

        myMutableString.addAttribute(NSFontAttributeName, value: UIFont(name: "Georgia", size: 36.0)!, range: NSRange(location: 0, length: 1))
        myMutableString.addAttribute(NSStrokeColorAttributeName, value: UIColor.blueColor(), range:  NSRange(location: 0, length: 1))
        myMutableString.addAttribute(NSStrokeWidthAttributeName, value: 2, range: NSRange(location: 0, length: 1))

        myMutableString.addAttribute(NSBackgroundColorAttributeName, value: UIColor.greenColor(), range: NSRange(location: 0, length: myString.length))
        myLabel.backgroundColor = UIColor.grayColor()

        //Apply to the label
        myLabel.attributedText = myMutableString    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

回答2:

For TTTAttributedLabel, you should use the custom attributes that are specific to the label, like kTTTBackgroundFillColorAttributeName.

来源：https://stackoverflow.com/questions/29915988/how-to-set-nsbackgroundcolorattributename-on-tttattributedlabel-ohattributedl

标签

swift

xcode6

tttattributedlabel

ohattributedlabel