Swift Replace Multiple Characters in String - ios

Question

Below is the following line of code I use to replace an HTML break tag with a carriage return. However, I have other HTML symbols that I need to replace and when I call this line of code again, with different parameters, it's as if the first one is overwritten. Is there a way I can include multiple parameters? Is there a more efficient way to do this in Swift? For example: replace both br> with "" and nbsp with "".
textView.text = content.stringByReplacingOccurrencesOfString("<br /><br />", withString:"\r")

Answer 1

Use replacingOccurrences along with a the String.CompareOptions.regularExpresion option.
Example (Swift 3):
var x = "<Hello, [play^ground+]>"
let y = x.replacingOccurrences(of: "[\\[\\]^+<>]", with: "7", options: .regularExpression, range: nil)
print(y)
Input characters which are to be replaced inside the square brackets like so [\\ Characters]
Output:
7Hello, 7play7ground777

Answer 2

I solved it based on the idea of Rosetta Code
extension String {
func stringByRemovingAll(characters: [Character]) -> String {
return String(self.characters.filter({ !characters.contains($0) }))
}
func stringByRemovingAll(subStrings: [String]) -> String {
var resultString = self
subStrings.map { resultString = resultString.stringByReplacingOccurrencesOfString($0, withString: "") }
return resultString
}
}
Example:
let str = "Hello, stackoverflow"
let chars: [Character] = ["a", "e", "i"]
let myStrings = ["Hello", ", ", "overflow"]
let newString = str.stringByRemovingAll(chars)
let anotherString = str.stringByRemovingAll(myStrings)
Result, when printed:
newString: Hllo, stckovrflow
anotherString: stack

Answer 3

As #matt mentioned you are starting over with the same content string. The stringByReplacingOccurrencesOfString method doesn't actually change anything in the original content string. It returns to you a new string with the replacement changes while content remains unchanged.
Something like this should work for you
let result1 = content.stringByReplacingOccurrencesOfString("<br /><br />", withString:"\r")
let result2 = result1.stringByReplacingOccurrencesOfString(" ", withString:" ")
textView.text = result2

Answer 4

extension String {
var html2AttributedString:NSAttributedString {
return NSAttributedString(data: dataUsingEncoding(NSUTF8StringEncoding)!, options:[NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType, NSCharacterEncodingDocumentAttribute: NSUTF8StringEncoding], documentAttributes: nil, error: nil)!
}
}
let myHtmlCode = "<style type=\"text/css\">#red{color:#F00}#green{color:#0F0}#blue{color: #00F}</style><span id=\"red\" >Red</span> <span id=\"green\" >Green</span><span id=\"blue\">Blue</span>"
myHtmlCode.html2AttributedString