快速参考

Question

我正在尝试制作一个简单的咖啡计算器。我需要以克为单位显示咖啡量。＆＃34; g＆＃34;克的符号需要附加到我用来显示金额的UILabel上。 UILabel中的数字正在根据用户输入动态变化，但是我需要添加一个小写＆＃34; g＆＃34;在字符串的末尾，格式与更新数字不同。＆＃34; g＆＃34;需要附加到数字，以便随着数字大小和位置的变化，＆＃34; g＆＃34; ＆＃34;移动＆＃34;随着数字。我确定这个问题已经解决，所以正确的方向链接会有所帮助，因为我已经用我的小心脏搜索了。

我已经在文档中搜索了一个属性字符串，我甚至下载了一个“归属字符串创建器”＃34;从应用商店，但结果代码是在Objective-C，我使用Swift。什么是令人敬畏的，并且可能对其他开发人员学习这种语言有帮助，这是使用Swift中的属性字符串创建具有自定义属性的自定义字体的明显示例。这方面的文档非常令人困惑，因为没有非常明确的方法来解决这个问题。我的计划是创建属性字符串并将其添加到coffeeAmount字符串的末尾。

var coffeeAmount: String = calculatedCoffee + attributedText

其中calculateCoffee是一个Int转换为字符串和＆＃34; attributedText＆＃34;是小写＆＃34; g＆＃34;使用我想要创建的自定义字体。也许我以错误的方式解决这个问题。任何帮助表示赞赏！

Answer 1

此答案已针对Swift 4.2进行了更新。

快速参考

制作和设置属性字符串的一般形式是这样的。您可以在下面找到其他常用选项。

// create attributed string
let myString = "Swift Attributed String"
let myAttribute = [ NSAttributedString.Key.foregroundColor: UIColor.blue ]
let myAttrString = NSAttributedString(string: myString, attributes: myAttribute) 

// set attributed text on a UILabel
myLabel.attributedText = myAttrString

let myAttribute = [ NSAttributedString.Key.foregroundColor: UIColor.blue ]

let myAttribute = [ NSAttributedString.Key.backgroundColor: UIColor.yellow ]

let myAttribute = [ NSAttributedString.Key.font: UIFont(name: "Chalkduster", size: 18.0)! ]

let myAttribute = [ NSAttributedString.Key.underlineStyle: NSUnderlineStyle.single.rawValue ]

let myShadow = NSShadow()
myShadow.shadowBlurRadius = 3
myShadow.shadowOffset = CGSize(width: 3, height: 3)
myShadow.shadowColor = UIColor.gray

let myAttribute = [ NSAttributedString.Key.shadow: myShadow ]

本文的其余部分为感兴趣的人提供了更多细节。

属性

字符串属性只是[NSAttributedString.Key: Any]形式的字典，其中NSAttributedString.Key是属性的键名，Any是某些类型的值。值可以是字体，颜色，整数或其他内容。 Swift中有许多已经预定义的标准属性。例如：

键名：NSAttributedString.Key.font，值：a UIFont
键名：NSAttributedString.Key.foregroundColor，值：a UIColor
键名：NSAttributedString.Key.link，值：NSURL或NSString

还有很多其他人。有关详情，请参阅this link。您甚至可以创建自己的自定义属性，如：

键名：NSAttributedString.Key.myName，值：某些类型。
如果你制作extension：

extension NSAttributedString.Key {
    static let myName = NSAttributedString.Key(rawValue: "myCustomAttributeKey")
}

在Swift中创建属性

您可以声明属性，就像声明任何其他字典一样。

// single attributes declared one at a time
let singleAttribute1 = [ NSAttributedString.Key.foregroundColor: UIColor.green ]
let singleAttribute2 = [ NSAttributedString.Key.backgroundColor: UIColor.yellow ]
let singleAttribute3 = [ NSAttributedString.Key.underlineStyle: NSUnderlineStyle.double.rawValue ]

// multiple attributes declared at once
let multipleAttributes: [NSAttributedString.Key : Any] = [
    NSAttributedString.Key.foregroundColor: UIColor.green,
    NSAttributedString.Key.backgroundColor: UIColor.yellow,
    NSAttributedString.Key.underlineStyle: NSUnderlineStyle.double.rawValue ]

// custom attribute
let customAttribute = [ NSAttributedString.Key.myName: "Some value" ]

请注意下划线样式值所需的rawValue。

因为属性只是字典，您还可以通过创建一个空字典然后向其添加键值对来创建它们。如果值包含多个类型，则必须使用Any作为类型。以下是上面的multipleAttributes示例，以这种方式重新创建：

var multipleAttributes = [NSAttributedString.Key : Any]()
multipleAttributes[NSAttributedString.Key.foregroundColor] = UIColor.green
multipleAttributes[NSAttributedString.Key.backgroundColor] = UIColor.yellow
multipleAttributes[NSAttributedString.Key.underlineStyle] = NSUnderlineStyle.double.rawValue

归属字符串

现在您了解了属性，您可以创建属性字符串。

<强>初始化

有几种方法可以创建属性字符串。如果您只需要一个只读字符串，则可以使用NSAttributedString。以下是一些初始化方法：

// Initialize with a string only
let attrString1 = NSAttributedString(string: "Hello.")

// Initialize with a string and inline attribute(s)
let attrString2 = NSAttributedString(string: "Hello.", attributes: [NSAttributedString.Key.myName: "A value"])

// Initialize with a string and separately declared attribute(s)
let myAttributes1 = [ NSAttributedString.Key.foregroundColor: UIColor.green ]
let attrString3 = NSAttributedString(string: "Hello.", attributes: myAttributes1)

如果您稍后需要更改属性或字符串内容，则应使用NSMutableAttributedString。声明非常相似：

// Create a blank attributed string
let mutableAttrString1 = NSMutableAttributedString()

// Initialize with a string only
let mutableAttrString2 = NSMutableAttributedString(string: "Hello.")

// Initialize with a string and inline attribute(s)
let mutableAttrString3 = NSMutableAttributedString(string: "Hello.", attributes: [NSAttributedString.Key.myName: "A value"])

// Initialize with a string and separately declared attribute(s)
let myAttributes2 = [ NSAttributedString.Key.foregroundColor: UIColor.green ]
let mutableAttrString4 = NSMutableAttributedString(string: "Hello.", attributes: myAttributes2)

更改归属字符串

举个例子，让我们在这篇文章的顶部创建一个属性字符串。

首先使用新的字体属性创建NSMutableAttributedString。

let myAttribute = [ NSAttributedString.Key.font: UIFont(name: "Chalkduster", size: 18.0)! ]
let myString = NSMutableAttributedString(string: "Swift", attributes: myAttribute )

如果您正在使用，请将属性字符串设置为UITextView（或UILabel），如下所示：

textView.attributedText = myString

您不使用textView.text。

结果如下：

然后追加另一个没有设置任何属性的属性字符串。（请注意，即使我使用let来声明上面的myString，我仍然可以修改它，因为它是一个NSMutableAttributedString。这对我来说似乎不太喜欢，如果我不喜欢，我也不会感到惊讶这种情况将来会发生变化。如果发生这种情况，请留言。）

let attrString = NSAttributedString(string: " Attributed Strings")
myString.append(attrString)

接下来，我们只选择“字符串”字样，该字词从索引17开始，长度为7。请注意，这是NSRange而不是Swift Range。（有关范围的更多信息，请参阅this answer。）addAttribute方法允许我们将属性键名称放在第一个位置，将属性值放在第二个位置，将范围放在第三个位置。

var myRange = NSRange(location: 17, length: 7) // range starting at location 17 with a lenth of 7: "Strings"
myString.addAttribute(NSAttributedString.Key.foregroundColor, value: UIColor.red, range: myRange)

最后，让我们添加背景颜色。对于多样性，让我们使用addAttributes方法（注意s）。我可以使用此方法一次添加多个属性，但我将再添加一个。

myRange = NSRange(location: 3, length: 17)
let anotherAttribute = [ NSAttributedString.Key.backgroundColor: UIColor.yellow ]
myString.addAttributes(anotherAttribute, range: myRange)

请注意，某些地方的属性是重叠的。添加属性不会覆盖已存在的属性。

进一步阅读

How to retrieve the attributes from a tap location
Attributed String Programming Guide（非常有用，但不幸的是仅在Objective-C中）

Answer 2

Swift使用与Obj-C相同的NSMutableAttributedString。您可以通过将计算值作为字符串传递来实例化它：

var attributedString = NSMutableAttributedString(string:"\(calculatedCoffee)")

现在创建属性g字符串（heh）。 注意： UIFont.systemFontOfSize(_)现在是一个可用的初始化程序，因此必须先将其解包，然后才能使用它：

var attrs = [NSFontAttributeName : UIFont.systemFontOfSize(19.0)!]
var gString = NSMutableAttributedString(string:"g", attributes:attrs)

然后追加它：

attributedString.appendAttributedString(gString)

然后，您可以将UILabel设置为显示NSAttributedString，如下所示：

myLabel.attributedText = attributedString

Answer 3

Swift 4：

let attributes = [NSAttributedStringKey.font: UIFont(name: "HelveticaNeue-Bold", size: 17)!, 
                  NSAttributedStringKey.foregroundColor: UIColor.white]

Answer 4

Xcode 6版本：

let attriString = NSAttributedString(string:"attriString", attributes:
[NSForegroundColorAttributeName: UIColor.lightGrayColor(), 
            NSFontAttributeName: AttriFont])

Xcode 9.3版本：

let attriString = NSAttributedString(string:"attriString", attributes:
[NSAttributedStringKey.foregroundColor: UIColor.lightGray, 
            NSAttributedStringKey.font: AttriFont])

Xcode 10，iOS 12，Swift 4 ：

let attriString = NSAttributedString(string:"attriString", attributes:
[NSAttributedString.Key.foregroundColor: UIColor.lightGray, 
            NSAttributedString.Key.font: AttriFont])

Answer 5

Swift：xcode 6.1

    let font:UIFont? = UIFont(name: "Arial", size: 12.0)

    let attrString = NSAttributedString(
        string: titleData,
        attributes: NSDictionary(
            object: font!,
            forKey: NSFontAttributeName))

Answer 6

我强烈建议将库用于属性字符串。如果你想要它，它会更容易很多，例如，一个字符串有四种不同的颜色和四种不同的字体。 Here is my favorite.它被称为SwiftyAttributes

如果你想使用SwiftyAttributes制作一个包含四种不同颜色和不同字体的字符串：

let magenta = "Hello ".withAttributes([
    .textColor(.magenta),
    .font(.systemFont(ofSize: 15.0))
    ])
let cyan = "Sir ".withAttributes([
    .textColor(.cyan),
    .font(.boldSystemFont(ofSize: 15.0))
    ])
let green = "Lancelot".withAttributes([
    .textColor(.green),
    .font(.italicSystemFont(ofSize: 15.0))

    ])
let blue = "!".withAttributes([
    .textColor(.blue),
    .font(.preferredFont(forTextStyle: UIFontTextStyle.headline))

    ])
let finalString = magenta + cyan + green + blue

finalString将显示为

Answer 7

在测试版6中运行良好

let attrString = NSAttributedString(
    string: "title-title-title",
    attributes: NSDictionary(
       object: NSFont(name: "Arial", size: 12.0), 
       forKey: NSFontAttributeName))

Answer 8

快捷键5

    let attrStri = NSMutableAttributedString.init(string:"This is red")
    let nsRange = NSString(string: "This is red").range(of: "red", options: String.CompareOptions.caseInsensitive)
    attrStri.addAttributes([NSAttributedString.Key.foregroundColor : UIColor.red, NSAttributedString.Key.font: UIFont.init(name: "PTSans-Regular", size: 15.0) as Any], range: nsRange)
    self.label.attributedText = attrStri

Answer 9

Swift 2.0

以下是一个示例：

let newsString: NSMutableAttributedString = NSMutableAttributedString(string: "Tap here to read the latest Football News.")
newsString.addAttributes([NSUnderlineStyleAttributeName: NSUnderlineStyle.StyleDouble.rawValue], range: NSMakeRange(4, 4))
sampleLabel.attributedText = newsString.copy() as? NSAttributedString

OR

let stringAttributes = [
    NSFontAttributeName : UIFont(name: "Helvetica Neue", size: 17.0)!,
    NSUnderlineStyleAttributeName : 1,
    NSForegroundColorAttributeName : UIColor.orangeColor(),
    NSTextEffectAttributeName : NSTextEffectLetterpressStyle,
    NSStrokeWidthAttributeName : 2.0]
let atrributedString = NSAttributedString(string: "Sample String: Attributed", attributes: stringAttributes)
sampleLabel.attributedText = atrributedString

Answer 10

在iOS上使用Attributed Strings的最佳方法是在界面构建器中使用内置的Attributed Text编辑器，并避免在源文件中使用不必要的硬编码NSAtrributedStringKeys。

您可以稍后使用此扩展名在运行时动态替换placehoderls：

extension NSAttributedString {
    func replacing(placeholder:String, with valueString:String) -> NSAttributedString {

        if let range = self.string.range(of:placeholder) {
            let nsRange = NSRange(range,in:valueString)
            let mutableText = NSMutableAttributedString(attributedString: self)
            mutableText.replaceCharacters(in: nsRange, with: valueString)
            return mutableText as NSAttributedString
        }
        return self
    }
}

添加一个故事板标签，其属性文字如下所示。

然后，您只需在每次需要时更新值：

label.attributedText = initalAttributedString.replacing(placeholder: "<price>", with: newValue)

确保将原始值保存到initalAttributedString中。

通过阅读本文，您可以更好地理解这种方法： https://medium.com/mobile-appetite/text-attributes-on-ios-the-effortless-approach-ff086588173e

Answer 11

我创建了一个可以解决您问题的在线工具！您可以编写字符串并以图形方式应用样式，该工具会为您提供objective-c和swift代码以生成该字符串。

也是开源的，所以随意扩展它并发送PR。

Transformer Tool

Github

Answer 12

对我来说，上面的解决方案在设置特定颜色或属性时不起作用。

这确实有效：

let attributes = [
    NSFontAttributeName : UIFont(name: "Helvetica Neue", size: 12.0)!,
    NSUnderlineStyleAttributeName : 1,
    NSForegroundColorAttributeName : UIColor.darkGrayColor(),
    NSTextEffectAttributeName : NSTextEffectLetterpressStyle,
    NSStrokeWidthAttributeName : 3.0]

var atriString = NSAttributedString(string: "My Attributed String", attributes: attributes)

Answer 13

func decorateText(sub:String, des:String)->NSAttributedString{
    let textAttributesOne = [NSAttributedStringKey.foregroundColor: UIColor.darkText, NSAttributedStringKey.font: UIFont(name: "PTSans-Bold", size: 17.0)!]
    let textAttributesTwo = [NSAttributedStringKey.foregroundColor: UIColor.black, NSAttributedStringKey.font: UIFont(name: "PTSans-Regular", size: 14.0)!]

    let textPartOne = NSMutableAttributedString(string: sub, attributes: textAttributesOne)
    let textPartTwo = NSMutableAttributedString(string: des, attributes: textAttributesTwo)

    let textCombination = NSMutableAttributedString()
    textCombination.append(textPartOne)
    textCombination.append(textPartTwo)
    return textCombination
}

//实施

cell.lblFrom.attributedText = decorateText(sub: sender!, des: " - \(convertDateFormatShort3(myDateString: datetime!))")

Answer 14

Swift 4

let attributes = [NSAttributedStringKey.font : UIFont(name: CustomFont.NAME_REGULAR.rawValue, size: CustomFontSize.SURVEY_FORM_LABEL_SIZE.rawValue)!]

let attributedString : NSAttributedString = NSAttributedString(string: messageString, attributes: attributes)

您需要删除swift 4中的原始值

Answer 15

详细信息

Swift 5.2，Xcode 11.4（11E146）

解决方案

protocol AttributedStringComponent {
    var text: String { get }
    func getAttributes() -> [NSAttributedString.Key: Any]?
}

// MARK: String extensions

extension String: AttributedStringComponent {
    var text: String { self }
    func getAttributes() -> [NSAttributedString.Key: Any]? { return nil }
}

extension String {
    func toAttributed(with attributes: [NSAttributedString.Key: Any]?) -> NSAttributedString {
        .init(string: self, attributes: attributes)
    }
}

// MARK: NSAttributedString extensions

extension NSAttributedString: AttributedStringComponent {
    var text: String { string }

    func getAttributes() -> [Key: Any]? {
        if string.isEmpty { return nil }
        var range = NSRange(location: 0, length: string.count)
        return attributes(at: 0, effectiveRange: &range)
    }
}

extension NSAttributedString {

    convenience init?(from attributedStringComponents: [AttributedStringComponent],
                      defaultAttributes: [NSAttributedString.Key: Any],
                      joinedSeparator: String = " ") {
        switch attributedStringComponents.count {
        case 0: return nil
        default:
            var joinedString = ""
            typealias SttributedStringComponentDescriptor = ([NSAttributedString.Key: Any], NSRange)
            let sttributedStringComponents = attributedStringComponents.enumerated().flatMap { (index, component) -> [SttributedStringComponentDescriptor] in
                var components = [SttributedStringComponentDescriptor]()
                if index != 0 {
                    components.append((defaultAttributes,
                                       NSRange(location: joinedString.count, length: joinedSeparator.count)))
                    joinedString += joinedSeparator
                }
                components.append((component.getAttributes() ?? defaultAttributes,
                                   NSRange(location: joinedString.count, length: component.text.count)))
                joinedString += component.text
                return components
            }

            let attributedString = NSMutableAttributedString(string: joinedString)
            sttributedStringComponents.forEach { attributedString.addAttributes($0, range: $1) }
            self.init(attributedString: attributedString)
        }
    }
}

用法

let defaultAttributes = [
    .font: UIFont.systemFont(ofSize: 16, weight: .regular),
    .foregroundColor: UIColor.blue
] as [NSAttributedString.Key : Any]

let marketingAttributes = [
    .font: UIFont.systemFont(ofSize: 20.0, weight: .bold),
    .foregroundColor: UIColor.black
] as [NSAttributedString.Key : Any]

let attributedStringComponents = [
    "pay for",
    NSAttributedString(string: "one",
                       attributes: marketingAttributes),
    "and get",
    "three!\n".toAttributed(with: marketingAttributes),
    "Only today!".toAttributed(with: [
        .font: UIFont.systemFont(ofSize: 16.0, weight: .bold),
        .foregroundColor: UIColor.red
    ])
] as [AttributedStringComponent]
let attributedText = NSAttributedString(from: attributedStringComponents, defaultAttributes: defaultAttributes)

完整示例

不要忘记在此处粘贴解决方案代码

import UIKit

class ViewController: UIViewController {

    private weak var label: UILabel!
    override func viewDidLoad() {
        super.viewDidLoad()
        let label = UILabel(frame: .init(x: 40, y: 40, width: 300, height: 80))
        label.numberOfLines = 2
        view.addSubview(label)
        self.label = label

        let defaultAttributes = [
            .font: UIFont.systemFont(ofSize: 16, weight: .regular),
            .foregroundColor: UIColor.blue
        ] as [NSAttributedString.Key : Any]

        let marketingAttributes = [
            .font: UIFont.systemFont(ofSize: 20.0, weight: .bold),
            .foregroundColor: UIColor.black
        ] as [NSAttributedString.Key : Any]

        let attributedStringComponents = [
            "pay for",
            NSAttributedString(string: "one",
                               attributes: marketingAttributes),
            "and get",
            "three!\n".toAttributed(with: marketingAttributes),
            "Only today!".toAttributed(with: [
                .font: UIFont.systemFont(ofSize: 16.0, weight: .bold),
                .foregroundColor: UIColor.red
            ])
        ] as [AttributedStringComponent]
        label.attributedText = NSAttributedString(from: attributedStringComponents, defaultAttributes: defaultAttributes)
        label.textAlignment = .center
    }
}

结果

Answer 16

Swift 2.1 - Xcode 7

@app.route('/url', methods=['GET', 'PUT'])

Answer 17

使用此示例代码。这是很短的代码，可以满足您的要求。这对我有用。

let attributes = [NSAttributedStringKey.font : UIFont(name: CustomFont.NAME_REGULAR.rawValue, size: CustomFontSize.SURVEY_FORM_LABEL_SIZE.rawValue)!]

let attributedString : NSAttributedString = NSAttributedString(string: messageString, attributes: attributes)

Answer 18

属性可以直接在swift 3中设置......

    let attributes = NSAttributedString(string: "String", attributes: [NSFontAttributeName : UIFont(name: "AvenirNext-Medium", size: 30)!,
         NSForegroundColorAttributeName : UIColor .white,
         NSTextEffectAttributeName : NSTextEffectLetterpressStyle])

然后在任何具有属性

的类中使用该变量

Answer 19

extension UILabel{
    func setSubTextColor(pSubString : String, pColor : UIColor){    
        let attributedString: NSMutableAttributedString = self.attributedText != nil ? NSMutableAttributedString(attributedString: self.attributedText!) : NSMutableAttributedString(string: self.text!);

        let range = attributedString.mutableString.range(of: pSubString, options:NSString.CompareOptions.caseInsensitive)
        if range.location != NSNotFound {
            attributedString.addAttribute(NSForegroundColorAttributeName, value: pColor, range: range);
        }
        self.attributedText = attributedString
    }
}

Answer 20

我做了一个函数，它接受字符串数组并返回带有您提供的属性的属性字符串。

func createAttributedString(stringArray: [String], attributedPart: Int, attributes: [NSAttributedString.Key: Any]) -> NSMutableAttributedString? {
    let finalString = NSMutableAttributedString()
    for i in 0 ..< stringArray.count {
        var attributedString = NSMutableAttributedString(string: stringArray[i], attributes: nil)
        if i == attributedPart {
            attributedString = NSMutableAttributedString(string: attributedString.string, attributes: attributes)
            finalString.append(attributedString)
        } else {
            finalString.append(attributedString)
        }
    }
    return finalString
}

在上面的示例中，您可以使用 attributedPart: Int

指定要获得属性的字符串部分

然后你给它的属性 属性：[NSAttributedString.Key: Any]

使用示例

if let attributedString = createAttributedString(stringArray: ["Hello ", "how ", " are you?"], attributedPart: 2, attributes: [NSAttributedString.Key.foregroundColor: UIColor.systemYellow]) {
      myLabel.attributedText = attributedString
}

会做：

Answer 21

 let attrString = NSAttributedString (
            string: "title-title-title",
            attributes: [NSAttributedStringKey.foregroundColor: UIColor.black])

Answer 22

使用我创建的库解决您的问题真的很容易。它被称为Atributika。

let calculatedCoffee: Int = 768
let g = Style("g").font(.boldSystemFont(ofSize: 12)).foregroundColor(.red)
let all = Style.font(.systemFont(ofSize: 12))

let str = "\(calculatedCoffee)<g>g</g>".style(tags: g)
    .styleAll(all)
    .attributedString

label.attributedText = str

您可以在https://github.com/psharanda/Atributika

找到它

Answer 23

Swift 4.2

extension UILabel {

    func boldSubstring(_ substr: String) {
        guard substr.isEmpty == false,
            let text = attributedText,
            let range = text.string.range(of: substr, options: .caseInsensitive) else {
                return
        }
        let attr = NSMutableAttributedString(attributedString: text)
        let start = text.string.distance(from: text.string.startIndex, to: range.lowerBound)
        let length = text.string.distance(from: range.lowerBound, to: range.upperBound)
        attr.addAttributes([NSAttributedStringKey.font: UIFont.boldSystemFont(ofSize: self.font.pointSize)],
                           range: NSMakeRange(start, length))
        attributedText = attr
    }
}

Answer 24

Objective-C 2.0 示例：

myUILabel.text = @"€ 60,00";
NSMutableAttributedString *amountText = [[NSMutableAttributedString alloc] initWithString:myUILabel.text];

//Add attributes you are looking for
NSDictionary *dictionaryOfAttributes = [NSDictionary dictionaryWithObjectsAndKeys:
                                        [UIFont systemFontOfSize:12],NSFontAttributeName,
                                        [UIColor grayColor],NSForegroundColorAttributeName,
                                        nil];

//Will gray color and resize the € symbol
[amountText setAttributes:dictionaryOfAttributes range:NSMakeRange(0, 1)];
myUILabel.attributedText = amountText;

Answer 25

Swifter Swift有一个非常不错的方法，可以真正完成而无需任何工作。只需提供应该匹配的模式以及要应用的属性即可。他们在很多方面都很出色，请检查一下。

await

如果您有多个应用此位置的地方，并且只希望在特定实例中发生，那么此方法将不起作用。

您可以一步完成此操作，分开后更容易阅读。

Answer 26

Swift 5及以上

   let attributedString = NSAttributedString(string:"targetString",
                                   attributes:[NSAttributedString.Key.foregroundColor: UIColor.lightGray,
                                               NSAttributedString.Key.font: UIFont(name: "Arial", size: 18.0) as Any])

Answer 27

请考虑使用Prestyler

import Prestyler
...
Prestyle.defineRule("$", UIColor.red)
label.attributedText = "\(calculatedCoffee) $g$".prestyled()

Answer 28

Swift 3.0 //创建属性字符串

定义属性，例如

let attributes = [NSAttributedStringKey.font : UIFont.init(name: "Avenir-Medium", size: 13.0)]

Answer 29

Swift 4.x

push()

Answer 30

extension String {
//MARK: Getting customized string
struct StringAttribute {
    var fontName = "HelveticaNeue-Bold"
    var fontSize: CGFloat?
    var initialIndexOftheText = 0
    var lastIndexOftheText: Int?
    var textColor: UIColor = .black
    var backGroundColor: UIColor = .clear
    var underLineStyle: NSUnderlineStyle = .styleNone
    var textShadow: TextShadow = TextShadow()

    var fontOfText: UIFont {
        if let font = UIFont(name: fontName, size: fontSize!) {
            return font
        } else {
            return UIFont(name: "HelveticaNeue-Bold", size: fontSize!)!
        }
    }

    struct TextShadow {
        var shadowBlurRadius = 0
        var shadowOffsetSize = CGSize(width: 0, height: 0)
        var shadowColor: UIColor = .clear
    }
}
func getFontifiedText(partOfTheStringNeedToConvert partTexts: [StringAttribute]) -> NSAttributedString {
    let fontChangedtext = NSMutableAttributedString(string: self, attributes: [NSFontAttributeName: UIFont(name: "HelveticaNeue-Bold", size: (partTexts.first?.fontSize)!)!])
    for eachPartText in partTexts {
        let lastIndex = eachPartText.lastIndexOftheText ?? self.count
        let attrs = [NSFontAttributeName : eachPartText.fontOfText, NSForegroundColorAttributeName: eachPartText.textColor, NSBackgroundColorAttributeName: eachPartText.backGroundColor, NSUnderlineStyleAttributeName: eachPartText.underLineStyle, NSShadowAttributeName: eachPartText.textShadow ] as [String : Any]
        let range = NSRange(location: eachPartText.initialIndexOftheText, length: lastIndex - eachPartText.initialIndexOftheText)
        fontChangedtext.addAttributes(attrs, range: range)
    }
    return fontChangedtext
}

}

//使用如下

    let someAttributedText = "Some   Text".getFontifiedText(partOfTheStringNeedToConvert: <#T##[String.StringAttribute]#>)

如何使用Swift创建属性字符串？

30 个答案:

快速参考

属性

在Swift中创建属性

归属字符串

更改归属字符串

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解决方案

用法

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