在一个标签中使用多种字体颜色
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“你好，你好吗”为例，“你好”是蓝色的，“你好”是绿色的？
这是可能的，它似乎比创build多个标签更容易？
有关更多信息， 请参阅我的博客文章 。
首先初始化你的NSString和NSMutableAttributedString ，如下所示。
var myString:NSString = "I AM KIRIT MODI" var myMutableString = NSMutableAttributedString() 在ViewDidLoad中
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() }
你输出：
多种颜色
在行代码的下方添加ViewDidLoad以获取string中的多个颜色。
myMutableString.addAttribute(NSForegroundColorAttributeName, value: UIColor.greenColor(), range: NSRange(location:10,length:5))
多彩色输出
更新了Swift 4的答案
您可以轻松使用UILabel的属性文字属性中的html来轻松地进行各种文本格式。
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") }
更新了Swift 2的答案
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") }
对于@赫姆斯摩拉迪亚
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
斯威夫特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
使用rakeshbs的答案在Swift 2中创build一个扩展：
// 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
甚至是单线
label.attributedText = "<font color=\"red\">This is </font> <font color=\"blue\"> some text!</font>".attributedStringFromHtml
关于扩展的好处是，您将在整个应用程序中为所有String提供.attributedStringFromHtml属性。
使用NSMutableAttributedString
myMutableString.addAttribute(NSForegroundColorAttributeName, value: UIColor.redColor(), range: NSRange(location:2,length:4))
在这里看到更多的细节swift使用归因string
Swift 3.0
let myMutableString = NSMutableAttributedString( string: "your desired text", attributes: [:]) myMutableString.addAttribute( NSForegroundColorAttributeName, value: UIColor.blue, range: NSRange( location:6, length:7))
对于更多的颜色，你可以不断添加属性的可变string。 更多例子在这里 。
我喜欢这样
let yourAttributes = [NSForegroundColorAttributeName: UIColor.black, NSFontAttributeName: UIFont.systemFontOfSize(15)] let yourOtherAttributes = [NSForegroundColorAttributeName: UIColor.red, NSFontAttributeName: UIFont.systemFontOfSize(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.appendAttributedString(partOne) combination.appendAttributedString(partTwo)
斯威夫特4
通过使用以下扩展function，可以直接将颜色属性设置为属性string，并将其应用于标签。
extension NSMutableAttributedString { func setColorForText(textForAttribute: String, withColor color: UIColor) { let range: NSRange = self.mutableString.range(of: textForAttribute, options: .caseInsensitive) self.addAttribute(NSAttributedStringKey.foregroundColor, value: color, range: range) } }
尝试以上的扩展名，使用标签：
let label = UILabel() label.frame = CGRect(x: 60, y: 100, width: 260, height: 50) let stringValue = "stackoverflow" 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：
Swift 3使用HTML版本的例子。
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") }
这里是支持最新版本的Swift截至2017年3月的代码。
Swift 3.0
在这里我创build了一个Helper类和方法
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 – 要在标签位置显示的文本：Int – 样式应该是应用程序，“0”作为string的开始或某个有效值作为string的字符位置：Int – 从直到这个风格适用多less个字符的位置。
以其他方式消费：
self.dateLabel?.attributedText = Helper.GetAttributedText(inputText: "Date : " + (self.myModel?.eventDate)!, location:0, length: 6)
输出：
注意：UI颜色可以被定义为UIColor.red颜色或用户定义的颜色，如UIColor(red: 0.401107, green: 0.352791, blue: 0.503067, alpha: 1.0)
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 }
SWIFT 3
在我的代码中，我创build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:5,length:4)) attributedText = attText } }
和这个使用
override func viewDidLoad() { super.viewDidLoad() titleLabel.setDifferentColor(string: titleLabel.text!, location: 5, length: 4) }
