为什么这个 swift 中的正则表达式不起作用？

Question

Edited:

I am trying to replace words in string using regex in Swift 5.

my code:

    let text = "hi avoid avoid avoid"
    let regex = "/(avoid|another word|word3)/gi"
    let str = text.replacingOccurrences(of: regex, with: "", options: [.regularExpression])

    print(str) // will print: "hi avoid avoid avoid"

expected result:

print(str) // will print: "hi "

So the regex should remove any avoid, another word or word3 words from the string

any help?

Answer 1

let myString = "hi avoid avoid avoid"
let regex = try! NSRegularExpression(pattern: "(avoid|another word|word3)", 
                   options: NSRegularExpression.Options.caseInsensitive)
let range = NSMakeRange(0, myString.count)
let modString = regex.stringByReplacingMatches(in: myString, options: [], 
                  range: range, withTemplate: "")
print(modString)