Swift 3 NSAttributedString multiple attributes - ios

Question

just started swift 3 and I have problems with swift syntax.
i'm trying to display a simple NSAttributedString.
so 1st I set my attributes :
let attributeFontSaySomething : [String : AnyObject] = [NSFontAttributeName : UIFont.fontSaySomething()]
let attributeColorSaySomething : [String : AnyObject] = [NSForegroundColorAttributeName : UIColor.blue]
Then I create my string :
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 :
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.
How can I create my string with the 2 attributes without using a NSMutableAttributedString ?

Answer 1

The main issue is that you are passing an array [attr.. , attr...] rather than one dictionary.
You need to merge the two dictionaries into one
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:
let attributes : [String : Any] = [NSFontAttributeName : UIFont.systemFont(ofSize: 12.0), NSForegroundColorAttributeName : UIColor.blue]

Answer 2

Just create a single dictionary with both sets of attributes:
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.
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.)

Answer 3

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

Answer 4

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

Answer 5

Thanks for #vadian's answer
Update For Swift 4
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)

Answer 6

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:
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:
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])

Answer 7

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

Answer 8

First you can initialise attributes by using
var myAttribute = [ NSAttributedString.Key.foregroundColor: UIColor.init(hexString: "#FFAEA9"), NSAttributedString.Key.font: UIFont(name: "Dubai-Medium", size: 16) ]
after that you can use it...
let myString = "Enter default amount"
let text = NSAttributedString(string: myString, attributes: myAttribute)
enterCustomAmount.setAttributedTitle(text, for: .normal)