有没有办法在iOS的单个标签中使用两种甚至三种字体颜色?
如果以文本“ hello,您好”为例,则“ hello”为蓝色,而“您好”为绿色?
这有可能比创建多个标签容易吗?
有没有办法在iOS的单个标签中使用两种甚至三种字体颜色?
如果以文本“ hello,您好”为例,则“ hello”为蓝色,而“您好”为绿色?
这有可能比创建多个标签容易吗?
Answers:
首先,如下所示初始化NSString和NSMutableAttributedString。
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()
}
输出值
多种颜色
在您的ViewDidLoad中添加以下行代码,以获取字符串中的多种颜色。
myMutableString.addAttribute(NSForegroundColorAttributeName, value: UIColor.greenColor(), range: NSRange(location:10,length:5))
多色输出
斯威夫特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))
对于@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
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
迅捷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
斯威夫特4
通过使用以下扩展功能,您可以直接将颜色属性设置为属性字符串,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)
// 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)
}
}
使用标签尝试上述扩展:
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:
更新了Swift 4的答案
您可以轻松地使用UILabel的attributedText属性内的html轻松进行各种文本格式设置。
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")
}
这是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
使用rakeshbs的答案在Swift 2中创建扩展
// 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
甚至是单班轮
label.attributedText = "<font color=\"red\">This is </font> <font color=\"blue\"> some text!</font>".attributedStringFromHtml
扩展的好处是,您将拥有整个应用程序中.attributedStringFromHtml
所有String
的属性。
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)
SWIFT 5的更新
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
}
}
和这个用
override func viewDidLoad() {
super.viewDidLoad()
titleLabel.setDifferentColor(string: titleLabel.text!, location: 5, length: 4)
}
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
Swift 4 UILabel扩展
就我而言,我需要能够经常在标签内设置不同的颜色/字体,因此我使用Krunal的NSMutableAttributedString扩展名进行了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)
使用HTML版本的Swift 3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")
}
这是支持2017年3月最新版本的Swift的代码。
斯威夫特3.0
在这里,我为该对象创建了一个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-应在其中应用样式的位置,“ 0”作为字符串的开头,或某个有效值作为字符串长度的字符位置:Int-从位置,直到此样式适用于多少个字符为止。
食用其他方法:
self.dateLabel?.attributedText = Helper.GetAttributedText(inputText: "Date : " + (self.myModel?.eventDate)!, location:0, length: 6)
输出:
注意:可以将UI颜色定义为colorUIColor.red
或将用户定义颜色定义为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
}
斯威夫特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