ios Swift 3 NSAttributedString 多个属性

Swift 3 NSAttributedString multiple attributes

提问by user2206906

just started swift 3 and I have problems with swift syntax.

刚刚开始使用 swift 3，我在使用 swift 语法时遇到了问题。

i'm trying to display a simple NSAttributedString.

我正在尝试显示一个简单的NSAttributedString.

so 1st I set my attributes :

所以第一我设置我的属性：

let attributeFontSaySomething : [String : AnyObject] = [NSFontAttributeName : UIFont.fontSaySomething()]
let attributeColorSaySomething : [String : AnyObject] = [NSForegroundColorAttributeName : UIColor.blue]

Then I create my string :

然后我创建我的字符串：

let attStringSaySomething = NSAttributedString(string: "Say something", attributes: self.attributeFontSaySomething)

What i would like to do is to create the string with my 2 attributes not only just one. But when i do :

我想要做的是用我的 2 个属性创建字符串，而不仅仅是一个。但是当我这样做时：

let attStringSaySomething = NSAttributedString(string: "Say something", attributes: [self.attributeFontSaySomething, self.attributeColorSaySomething])

Xcode tells me I can't and want me to change this for a literal dictionary.

Xcode 告诉我我不能，并希望我将其更改为文字字典。

How can I create my string with the 2 attributes without using a NSMutableAttributedString?

如何在不使用 的情况下创建具有 2 个属性的字符串NSMutableAttributedString？

回答by vadian

The main issue is that you are passing an array[attr.. , attr...]rather than one dictionary.

主要问题是您传递的是一个数组[attr.. , attr...]而不是一个字典。

You need to merge the two dictionaries into one

您需要将两个字典合并为一个

let attributeFontSaySomething : [String : Any] = [NSFontAttributeName : UIFont.systemFont(ofSize: 12.0)]
let attributeColorSaySomething : [String : Any] = [NSForegroundColorAttributeName : UIColor.blue]

var attributes = attributeFontSaySomething
for (key, value) in attributeColorSaySomething {
    attributes(value, forKey: key)
}

let attStringSaySomething = NSAttributedString(string: "Say something", attributes: attributes)

However it might be easier to create the dictionary literally:

但是，从字面上创建字典可能更容易：

let attributes : [String : Any] = [NSFontAttributeName : UIFont.systemFont(ofSize: 12.0), NSForegroundColorAttributeName : UIColor.blue]

回答by Duncan C

Just create a single dictionary with both sets of attributes:

只需创建一个具有两组属性的字典：

let attributes: [String:AnyObject] = 
  [NSFontAttributeName : UIFont.fontSaySomething(), 
  NSForegroundColorAttributeName : UIColor.blue]

And then use the dictionary with both key/value pairs when creating your attributed string.

然后在创建属性字符串时使用带有两个键/值对的字典。

There's no built-in mechanism in Swift for combining dictionaries, but you could add an override of the +operator if you wanted to be able to add dictionaries together (You'd have to work out what to do if both dictionaries contained the same key however.)

Swift 中没有用于组合字典的内置机制，但是+如果您希望能够将字典添加在一起，您可以添加运算符的覆盖（但是，如果两个字典都包含相同的键，您必须弄清楚该怎么做） .)

回答by Baljeet Singh

Thanks for @vadian's answer

感谢@vadian 的回答

Update For Swift 4

Swift 4 更新

let attributes : [NSAttributedStringKey : Any] = [NSAttributedStringKey(rawValue: NSAttributedStringKey.font.rawValue) : UIFont.systemFont(ofSize: 12.0), NSAttributedStringKey(rawValue: NSAttributedStringKey.foregroundColor.rawValue) : UIColor(hex:"4C0000")]

refreshControl.attributedTitle=NSAttributedString(string: "Refreshing...", attributes: attributes)

回答by Poles

Use like this:

像这样使用：

let attStringSaySomething = NSAttributedString.init(string: "Hello", attributes: [NSFontAttributeName: UIFont.systemFont(ofSize: 16), NSForegroundColorAttributeName:UIColor.black])

回答by DURGESH

You can use this code for different attributes on different strings With Roboto font (For Roboto fontuse MDFRobotoFontLoader)

您可以使用此代码对不同字符串的不同属性使用 Roboto 字体（对于Roboto 字体使用MDFRobotoFontLoader）

let yourAttributes = [NSForegroundColorAttributeName: UIColor.black, NSFontAttributeName: MDFRobotoFontLoader.sharedInstance().regularFont(ofSize: 20)]

let finalString =  NSMutableAttributedString(string: "", attributes: yourAttributes)

let attributeStr =  NSMutableAttributedString(string: "XYZGFDGii", attributes: yourAttributes)
       finalString.append(attributeStr)

let yourOtherAttributes = [NSForegroundColorAttributeName: UIColor.red, NSFontAttributeName: MDFRobotoFontLoader.sharedInstance().regularFont(ofSize: 24)]

let partTwo = NSMutableAttributedString(string: "hfjghlkdhkjld", attributes: yourOtherAttributes)
       finalString.append(partTwo)

This example uses Roboto font

此示例使用 Roboto 字体

回答by Umit Kaya

Some of the answers are out dated here, especially for Swift 4 and above, you can use something like:

这里的一些答案已经过时了，尤其是对于 Swift 4 及更高版本，您可以使用以下内容：

let wholeString = "This is whole string"
let partToAttribute = "whole string"

let attributedMessage = NSMutableAttributedString(string: wholeString)
    .highlightString(with: UIColor.blue, for: partToAttribute, isBackground: true)
    .fontHighlightString(with: UIFont.makeBoldFont(size: 16), color: UIColor.white, for: partToAttribute)

titleLabel.attributedText = attributedMessage

So at the end, you apply 2 attributes which are highlightStringand fontHighlightString

所以最后，你应用了 2 个属性，它们是highlightString和fontHighlightString

回答by dirtydanee

The problem is that you are inserting two dictionaries into a dictionary, what only expects [String: Any], not [[String: Any], [String: Any]]type. You can do the following:

问题是您将两个字典插入到字典中，只需要什么[String: Any]，而不是[[String: Any], [String: Any]]类型。您可以执行以下操作：

let attStringSaySomething = NSAttributedString(string: "Say something", attributes: [NSFontAttributeName : UIFont.fontSaySomething(), NSForegroundColorAttributeName : UIColor.blue])

You could also group the values into tuples instead of dictionaries, and insert them into your dictionary based on the key and value:

您还可以将值分组为元组而不是字典，并根据键和值将它们插入字典中：

let attributeFontSaySomething = (key: NSFontAttributeName, value: UIFont.fontSaySomething())
let attributeColorSaySomething = (key: NSForegroundColorAttributeName, value: UIColor.blue)

let attStringSaySomething = NSAttributedString(string: "Say something", attributes: [attributeFontSaySomething.key : attributeFontSaySomething.value,attributeColorSaySomething.key : attributeColorSaySomething.value])