如何使用Swift创建属性字符串？

野性酷女 2023-03-05 03:10 11阅读 0赞

本文翻译自：[How do I make an attributed string using Swift?][How do I make an attributed string using Swift]

*I am trying to make a simple Coffee Calculator.* **我正在尝试制作一个简单的咖啡计算器。** *I need to display the amount of coffee in grams.* **我需要显示咖啡的克数。** *The "g" symbol for grams needs to be attached to my UILabel that I am using to display the amount.* **克的“ g”符号需要附加到我用来显示数量的UILabel上。** *The numbers in the UILabel are changing dynamically with user input just fine, but I need to add a lower case "g" on the end of the string that is formatted differently from the updating numbers.* **UILabel中的数字随用户输入的变化而动态变化，但是我需要在字符串的末尾添加小写的“ g”，其格式与更新数字的格式不同。** *The "g" needs to be attached to the numbers so that as the number size and position changes, the "g" "moves" with the numbers.* **需要将“ g”附加到数字上，以便随着数字大小和位置的变化，“ g”随数字一起“移动”。** *I'm sure this problem has been solved before so a link in the right direction would be helpful as I've googled my little heart out.* **我敢肯定这个问题已经解决了，所以正确的链接会很有帮助，因为我已经用心搜寻了。**

*I've searched through the documentation for an attributed string and I even downloded an "Attributed String Creator" from the app store, but the resulting code is in Objective-C and I am using Swift.* **我在文档中搜索了属性字符串，甚至从应用程序商店下载了“属性字符串创建器”，但是结果代码在Objective-C中，并且我正在使用Swift。** *What would be awesome, and probably helpful to other developers learning this language, is a clear example of creating a custom font with custom attributes using an attributed string in Swift.* **一个很棒的示例，这显然是在Swift中使用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，并且可能对其他开发人员有所帮助。** *The documentation for this is very confusing as there is not a very clear path on how to do so.* **有关此操作的文档非常混乱，因为如何执行此操作的路径并不明确。** *My plan is to create the attributed string and add it to the end of my coffeeAmount string.* **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

*Where calculatedCoffee is an Int converted to a string and "attributedText" is the lowercase "g" with customized font that I am trying to create.* **其中calculatedCoffee是将Int转换为字符串的整数，而“ attributedText”是我尝试创建的具有自定义字体的小写字母“ g”。** *Maybe I'm going about this the wrong way.* **也许我正在以错误的方式进行操作。** *Any help is appreciated!* **任何帮助表示赞赏！**

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### \#1楼 ###

参考：[https://stackoom.com/question/1FuT1/如何使用Swift创建属性字符串][https_stackoom.com_question_1FuT1_Swift]

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### \#2楼 ###

*Swift uses the same `NSMutableAttributedString` that Obj-C does.* **Swift使用与Obj-C相同的`NSMutableAttributedString` 。** *You instantiate it by passing in the calculated value as a string:* **您可以通过将计算值作为字符串传入来实例化它：**

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

*Now create the attributed `g` string (heh).* **现在创建属性`g`字符串（heh）。** ***Note:** `UIFont.systemFontOfSize(_)` is now a failable initializer, so it has to be unwrapped before you can use it:* **注意： `UIFont.systemFontOfSize(_)`现在是一个可失败的初始化程序，因此必须先将其拆开，然后才能使用它：**

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

*And then append it:* **然后附加：**

attributedString.appendAttributedString(gString)

*You can then set the UILabel to display the NSAttributedString like this:* **然后，您可以设置UILabel以显示NSAttributedString，如下所示：**

myLabel.attributedText = attributedString

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### \#3楼 ###

*Works well in beta 6* **在Beta 6中运作良好**

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

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### \#4楼 ###

***Xcode 6 version** :* **Xcode 6版本 ：**

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

***Xcode 9.3 version** :* **Xcode 9.3版本 ：**

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

***Xcode 10, iOS 12, Swift 4** :* **Xcode 10，iOS 12，Swift 4 ：**

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

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### \#5楼 ###

*Swift: xcode 6.1* **斯威夫特：xcode 6.1**

let font:UIFont? = UIFont(name: "Arial", size: 12.0)
    
        let attrString = NSAttributedString(
            string: titleData,
            attributes: NSDictionary(
                object: font!,
                forKey: NSFontAttributeName))

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### \#6楼 ###

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

[How do I make an attributed string using Swift]: https://oldbug.net/q/1FuT1/How-do-I-make-an-attributed-string-using-Swift
[https_stackoom.com_question_1FuT1_Swift]: https://stackoom.com/question/1FuT1/%E5%A6%82%E4%BD%95%E4%BD%BF%E7%94%A8Swift%E5%88%9B%E5%BB%BA%E5%B1%9E%E6%80%A7%E5%AD%97%E7%AC%A6%E4%B8%B2