How to concate two NSAttributed String in swift?

Question

I have Two NSAttributed String but when I concate like

self.label.text = attrStr1 + attrStr2 //gives error

     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)!

Also can we concate one NSAttributedString and another NSString?

Read the docs. You need NSMutableAttributedString and it has a method appendAttributedString. Not reading the docs is just lazy — Fogmeister, Jul 04 '15 at 19:16
Yes, because NSAttributedString is not NSMutableAttributedString. — Fogmeister, Jul 04 '15 at 19:17
gives error "void is not convertible to "NSAttributedString" even i use NSMutableAttributedString — New iOS Dev, Jul 04 '15 at 19:21
that's because the method doesn't return anything and you are trying to set a string using it. This method will mutate the string it is being called in. Show the code you used. — Fogmeister, Jul 04 '15 at 19:22

score 4 · Accepted Answer · answered Jul 04 '15 at 19:20

     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

Andrew____Pls_Support_Ukraine · Answer 2 · 2020-06-11T15:56:59.023

1

2020 | SWIFT 5.1: You're able to add 2 NSAttributedString this like:

let concatenated =  NSAttrStr1.append(NSAttrStr2)

Also there is exist another better answer on the same question here: https://stackoverflow.com/a/60329354/4423545

edited Jun 11 '20 at 15:56

answered Feb 20 '20 at 22:14

Andrew____Pls_Support_Ukraine

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Binary operator '+' cannot be applied to two 'NSAttributedString' operands – shtefane Mar 17 '20 at 11:34
For apend the error is: Cannot convert value of type 'Void' to specified type 'NSMutableAttributedString'. I can't find the reason of these errors. – shtefane Mar 17 '20 at 11:41
@shtefane this means that your NSAttrStr2 is void, but not NSMutableAttributedString – Andrew____Pls_Support_Ukraine Jun 11 '20 at 15:58

How to concate two NSAttributed String in swift?

2 Answers2