How to concatenate two NSAttributedStrings in Swift?

Question

I have two NSAttributedStrings:

var attrStr1: NSAttributedString = NSAttributedString(data: "
<b>Welcome</b>".dataUsingEncoding(NSUnicodeStringEncoding, 
allowLossyConversion: true)!,options: [ NSDocumentTypeDocumentAttribute:
 NSHTMLTextDocumentType],documentAttributes: nil,error: nil)!

var attrStr2: NSAttributedString = NSAttributedString(data: "
<i>User</i>".dataUsingEncoding(NSUnicodeStringEncoding, 
allowLossyConversion: true)!,options: [ NSDocumentTypeDocumentAttribute: 
NSHTMLTextDocumentType],documentAttributes: nil,error: nil)!

When I concatenate them like this:

self.label.text = attrStr1 + attrStr2

I get an error.

How can I concatenate two NSAttributedStrings?

Is it possible to concatenate an NSAttributedString and an NSString?

Answer 1

     var attrStr1: NSAttributedString = NSAttributedString(data: "
<b>Welcome</b>".dataUsingEncoding(NSUnicodeStringEncoding, 
allowLossyConversion: true)!,options: [ NSDocumentTypeDocumentAttribute:
 NSHTMLTextDocumentType],documentAttributes: nil,error: nil)!

    var attrStr2: NSAttributedString = NSAttributedString(data: "
<i>User</i>".dataUsingEncoding(NSUnicodeStringEncoding, 
allowLossyConversion: true)!,options: [ NSDocumentTypeDocumentAttribute: 
NSHTMLTextDocumentType],documentAttributes: nil,error: nil)!

Concatenate this strings :

var concate = NSMutableAttributedString(attributedString: attrStr1)
concate.appendAttributedString(attrStr2)

self.label.text = concate