在单个标签中使用多种字体颜色

Question

有没有办法在 iOS 中的单个标签中使用两种甚至三种字体颜色？

如果以文字"hello, how are you"为例，"hello,"是蓝色，"how are you"是绿色？

这样可以吗，好像比创建多个标签更简单？

Answer 1

利用NSMutableAttributedString

myMutableString.addAttribute(NSForegroundColorAttributeName, value: UIColor.redColor(), range: NSRange(location:2,length:4))

在此处查看更多详细信息swift-using-attributed-strings

Answer 2

Swift4

的更新答案

您可以轻松地在 UILabel 的 attributedText 属性中使用 html 轻松地进行各种文本格式化。

 let htmlString = "<font color=\"red\">This is  </font> <font color=\"blue\"> some text!</font>"

    let encodedData = htmlString.data(using: String.Encoding.utf8)!
    let attributedOptions = [NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType]
    do {
        let attributedString = try NSAttributedString(data: encodedData, options: attributedOptions, documentAttributes: nil)
        label.attributedText = attributedString

    } catch _ {
        print("Cannot create attributed String")
    }

Swift2

的更新答案

let htmlString = "<font color=\"red\">This is  </font> <font color=\"blue\"> some text!</font>"

let encodedData = htmlString.dataUsingEncoding(NSUTF8StringEncoding)!
let attributedOptions = [NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType]
do {
    let attributedString = try NSAttributedString(data: encodedData, options: attributedOptions, documentAttributes: nil)
    label.attributedText = attributedString

} catch _ {
    print("Cannot create attributed String")
}

Answer 3

Reference from here.

首先初始化 NSString 和 NSMutableAttributedString，如下所示。

var myString:NSString = "I AM KIRIT MODI"
var myMutableString = NSMutableAttributedString()

在ViewDidLoad

override func viewDidLoad() {

    myMutableString = NSMutableAttributedString(string: myString, attributes: [NSFontAttributeName:UIFont(name: "Georgia", size: 18.0)!])
    myMutableString.addAttribute(NSForegroundColorAttributeName, value: UIColor.redColor(), range: NSRange(location:2,length:4))
    // set label Attribute
    labName.attributedText = myMutableString
    super.viewDidLoad()
}

输出

多种颜色

在您的 ViewDidLoad 中添加下面的行代码以在字符串中获取多种颜色。

 myMutableString.addAttribute(NSForegroundColorAttributeName, value: UIColor.greenColor(), range: NSRange(location:10,length:5))

多色输出

Swift 4

var myMutableString = NSMutableAttributedString(string: str, attributes: [NSAttributedStringKey.font :UIFont(name: "Georgia", size: 18.0)!])
myMutableString.addAttribute(NSAttributedStringKey.foregroundColor, value: UIColor.red, range: NSRange(location:2,length:4))

Swift 5.0

 var myMutableString = NSMutableAttributedString(string: str, attributes: [NSAttributedString.Key.font :UIFont(name: "Georgia", size: 18.0)!])
 myMutableString.addAttribute(NSAttributedString.Key.foregroundColor, value: UIColor.red, range: NSRange(location:2,length:4))

Answer 4

使用的答案在 Swift 中创建扩展 2:

// StringExtension.swift
import UIKit
import Foundation

extension String {

    var attributedStringFromHtml: NSAttributedString? {
        do {
            return try NSAttributedString(data: self.dataUsingEncoding(NSUTF8StringEncoding)!, options: [NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType], documentAttributes: nil)
        } catch _ {
            print("Cannot create attributed String")
        }
        return nil
    }
}

用法：

let htmlString = "<font color=\"red\">This is  </font> <font color=\"blue\"> some text!</font>"
label.attributedText = htmlString.attributedStringFromHtml

甚至单行

label.attributedText = "<font color=\"red\">This is  </font> <font color=\"blue\"> some text!</font>".attributedStringFromHtml

扩展的好处在于，您将拥有整个应用程序中所有 String 的 .attributedStringFromHtml 属性。

Answer 5

@Hems Moradiya

let attrs1 = [NSFontAttributeName : UIFont.boldSystemFontOfSize(18), NSForegroundColorAttributeName : UIColor.greenColor()]

let attrs2 = [NSFontAttributeName : UIFont.boldSystemFontOfSize(18), NSForegroundColorAttributeName : UIColor.whiteColor()]

let attributedString1 = NSMutableAttributedString(string:"Drive", attributes:attrs1)

let attributedString2 = NSMutableAttributedString(string:"safe", attributes:attrs2)

attributedString1.appendAttributedString(attributedString2)
self.lblText.attributedText = attributedString1

Swift 4

    let attrs1 = [NSAttributedStringKey.font : UIFont.boldSystemFont(ofSize: 18), NSAttributedStringKey.foregroundColor : UIColor.green]

    let attrs2 = [NSAttributedStringKey.font : UIFont.boldSystemFont(ofSize: 18), NSAttributedStringKey.foregroundColor : UIColor.white]

    let attributedString1 = NSMutableAttributedString(string:"Drive", attributes:attrs1)

    let attributedString2 = NSMutableAttributedString(string:"safe", attributes:attrs2)

    attributedString1.append(attributedString2)
    self.lblText.attributedText = attributedString1

Swift 5

    let attrs1 = [NSAttributedString.Key.font : UIFont.boldSystemFont(ofSize: 18), NSAttributedString.Key.foregroundColor : UIColor.green]

    let attrs2 = [NSAttributedString.Key.font : UIFont.boldSystemFont(ofSize: 18), NSAttributedString.Key.foregroundColor : UIColor.white]

    let attributedString1 = NSMutableAttributedString(string:"Drive", attributes:attrs1)

    let attributedString2 = NSMutableAttributedString(string:"safe", attributes:attrs2)

    attributedString1.append(attributedString2)
    self.lblText.attributedText = attributedString1

Answer 6

我喜欢这样

let yourAttributes = [NSAttributedString.Key.foregroundColor: UIColor.black, NSAttributedString.Key.font: UIFont.systemFont(ofSize: 15)]
    let yourOtherAttributes = [NSAttributedString.Key.foregroundColor: UIColor.red, NSAttributedString.Key.font: UIFont.systemFont(ofSize: 25)]

    let partOne = NSMutableAttributedString(string: "This is an example ", attributes: yourAttributes)
    let partTwo = NSMutableAttributedString(string: "for the combination of Attributed String!", attributes: yourOtherAttributes)

    let combination = NSMutableAttributedString()

    combination.append(partOne)
    combination.append(partTwo)

Answer 7

Swift 3 使用 HTML 版本的示例。

let encodedData = htmlString.data(using: String.Encoding.utf8)!
            let attributedOptions = [NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType]
            do {
                let attributedString = try NSAttributedString(data: encodedData, options: attributedOptions, documentAttributes: nil)
                label.attributedText = attributedString
            } catch _ {
                print("Cannot create attributed String")
            }

Answer 8

Swift 3.0

let myMutableString = NSMutableAttributedString(
                            string: "your desired text",
                            attributes: [:])

myMutableString.addAttribute(
                            NSForegroundColorAttributeName,
                            value: UIColor.blue,
                            range: NSRange(
                                location:6,
                                length:7))

要获得更多颜色，您可以继续向可变字符串添加属性。更多示例 here.

Answer 9

这是支持 2017 年 3 月 Swift 最新版本的代码。

Swift 3.0

我在这里为

创建了一个助手 class 和方法

public class Helper {

static func GetAttributedText(inputText:String, location:Int,length:Int) -> NSMutableAttributedString {
        let attributedText = NSMutableAttributedString(string: inputText, attributes: [NSFontAttributeName:UIFont(name: "Merriweather", size: 15.0)!])
        attributedText.addAttribute(NSForegroundColorAttributeName, value: UIColor(red: 0.401107, green: 0.352791, blue: 0.503067, alpha: 1.0) , range: NSRange(location:location,length:length))
       return attributedText
    }
}

在方法参数中， inputText:String - 您要在标签中显示的文本 location:Int - 样式应为应用程序，“0”作为字符串的开头或某个有效值作为字符串的字符位置 length:Int - 从位置到此样式适用的字符数。

以其他方式消费：

self.dateLabel?.attributedText = Helper.GetAttributedText(inputText: "Date : " + (self.myModel?.eventDate)!, location:0, length: 6)

输出：

注：UI颜色可以定义颜色为UIColor.red或用户自定义颜色为UIColor(red: 0.401107, green: 0.352791, blue: 0.503067, alpha: 1.0)

Answer 10

func MultiStringColor(first:String,second:String) -> NSAttributedString
    {
        let MyString1 = [NSFontAttributeName : FontSet.MonsRegular(size: 14), NSForegroundColorAttributeName : FoodConstant.PUREBLACK]

        let MyString2 = [NSFontAttributeName : FontSet.MonsRegular(size: 14), NSForegroundColorAttributeName : FoodConstant.GREENCOLOR]

        let attributedString1 = NSMutableAttributedString(string:first, attributes:MyString1)

        let attributedString2 = NSMutableAttributedString(string:second, attributes:MyString2)

        MyString1.append(MyString2)

        return MyString1
    }

Answer 11

更新 SWIFT 5

func setDiffColor(color: UIColor, range: NSRange) {
     let attText = NSMutableAttributedString(string: self.text!)
     attText.addAttribute(NSAttributedString.Key.foregroundColor, value: color, range: range)
     attributedText = attText
}

SWIFT 3

在我的代码中，我创建了一个扩展

import UIKit
import Foundation

extension UILabel {
    func setDifferentColor(string: String, location: Int, length: Int){

        let attText = NSMutableAttributedString(string: string)
        attText.addAttribute(NSForegroundColorAttributeName, value: UIColor.blueApp, range: NSRange(location:location,length:length))
        attributedText = attText

    }
}

这个供使用

override func viewDidLoad() {
        super.viewDidLoad()

        titleLabel.setDifferentColor(string: titleLabel.text!, location: 5, length: 4)

    }

Answer 12

Swift 4

通过使用以下扩展函数，您可以直接将颜色属性设置为属性字符串，并将其应用于您的标签。

extension NSMutableAttributedString {

    func setColorForText(textForAttribute: String, withColor color: UIColor) {
        let range: NSRange = self.mutableString.range(of: textForAttribute, options: .caseInsensitive)

        // Swift 4.2 and above
        self.addAttribute(NSAttributedString.Key.foregroundColor, value: color, range: range)

        // Swift 4.1 and below
        self.addAttribute(NSAttributedStringKey.foregroundColor, value: color, range: range)
    }

}

尝试上面的扩展，使用标签：

let label = UILabel()
label.frame = CGRect(x: 60, y: 100, width: 260, height: 50)
let stringValue = "Whosebug"

let attributedString: NSMutableAttributedString = NSMutableAttributedString(string: stringValue)
attributedString.setColorForText(textForAttribute: "stack", withColor: UIColor.black)
attributedString.setColorForText(textForAttribute: "over", withColor: UIColor.orange)
attributedString.setColorForText(textForAttribute: "flow", withColor: UIColor.red)
label.font = UIFont.boldSystemFont(ofSize: 40)

label.attributedText = attributedString
self.view.addSubview(label)

结果：

Answer 13

为了在 swift 较低版本中使用此 NSForegroundColorAttributeName，您可能会遇到未解决的标识符问题，将上面的内容更改为 NSAttributedStringKey.foregroundColor.

             swift lower version                swift latest version

即 NSForegroundColorAttributeName == NSAttributedStringKey.foregroundColor

Answer 14

Swift 4 UILabel 扩展

在我的例子中，我需要能够经常在标签中设置不同的 colors/fonts，所以我使用 Krunal 的 NSMutableAttributedString 扩展做了一个 UILabel 扩展。

func highlightWords(phrases: [String], withColor: UIColor?, withFont: UIFont?) {

    let attributedString: NSMutableAttributedString = NSMutableAttributedString(string: self.text!)

    for phrase in phrases {

        if withColor != nil {
            attributedString.setColorForText(textForAttribute: phrase, withColor: withColor!)
        }
        if withFont != nil {
            attributedString.setFontForText(textForAttribute: phrase, withFont: withFont!)
        }

    }

    self.attributedText = attributedString

}

可以这样使用：

yourLabel.highlightWords(phrases: ["hello"], withColor: UIColor.blue, withFont: nil)
yourLabel.highlightWords(phrases: ["how are you"], withColor: UIColor.green, withFont: nil)

Answer 15

使用可可足Prestyler:

Prestyle.defineRule("*", Color.blue)
Prestyle.defineRule("_", Color.red)
label.attributedText = "*This text is blue*, _but this one is red_".prestyled()

Answer 16

Swift 4.2

    let paragraphStyle = NSMutableParagraphStyle()
    paragraphStyle.alignment = NSTextAlignment.center

    var stringAlert = self.phoneNumber + "로\r로전송인증번호를입력해주세요"
    let attributedString: NSMutableAttributedString = NSMutableAttributedString(string: stringAlert, attributes: [NSAttributedString.Key.paragraphStyle:paragraphStyle,  .font: UIFont(name: "NotoSansCJKkr-Regular", size: 14.0)])
    attributedString.setColorForText(textForAttribute: self.phoneNumber, withColor: UIColor.init(red: 1.0/255.0, green: 205/255.0, blue: 166/255.0, alpha: 1) )
    attributedString.setColorForText(textForAttribute: "로\r로전송인증번호를입력해주세요", withColor: UIColor.black)

    self.txtLabelText.attributedText = attributedString

结果

Answer 17

这里是 Swift 5

的解决方案

let label = UILabel()
let text = NSMutableAttributedString()
text.append(NSAttributedString(string: "stack", attributes: [NSAttributedString.Key.foregroundColor: UIColor.white]));
text.append(NSAttributedString(string: "overflow", attributes: [NSAttributedString.Key.foregroundColor: UIColor.gray]))
label.attributedText = text

Answer 18

如果你想在你的应用程序中多次使用它，你可以只创建 UILabel 的扩展，它会变得更简单：-

Swift 5

extension UILabel {
    func setSpannedColor (fullText : String , changeText : String ) {
        let strNumber: NSString = fullText as NSString
        let range = (strNumber).range(of: changeText)
        let attribute = NSMutableAttributedString.init(string: fullText)
        attribute.addAttribute(NSAttributedString.Key.foregroundColor, value: UIColor.red , range: range)
        self.attributedText = attribute
    }
}

使用您的标签：-

yourLabel = "Hello Test"
yourLabel.setSpannedColor(fullText: totalLabel.text!, changeText: "Test")

在单个标签中使用多种字体颜色

Use multiple font colors in a single label

textcolor

nsattributedstring

uilabel

ios

swift

Swift 3.0