How to Remove Special Characters from String in Swift 2

How to remove special characters from string in Swift 2?

Like this:

func removeSpecialCharsFromString(text: String) -> String {
    let okayChars : Set<Character> = 
        Set("abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLKMNOPQRSTUVWXYZ1234567890+-*=(),.:!_".characters)
    return String(text.characters.filter {okayChars.contains($0) })
}

And here's how to test:

let s = removeSpecialCharsFromString("père") // "pre"

Swift – How to remove special character without remove emoji from string?

You can use below extension to make your sentence perfect as per desired output.

extension String {
    var condensedWhitespace: String {
        let components = self.components(separatedBy: NSCharacterSet.whitespacesAndNewlines)
        return components.filter { !$0.isEmpty }.joined(separator: " ")
    }

    func removeSpecialCharacters() -> String {
        let okayChars = CharacterSet(charactersIn: "abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLKMNOPQRSTUVWXYZ1234567890 ")
        return String(self.unicodeScalars.filter { okayChars.contains($0) || $0.properties.isEmoji })
    }
}

Example.

let input = "Hello guys !? Need some money $ br>
print(input.removeSpecialCharacters().condensedWhitespace)
// Hello guys Need some money br>

Remove special characters from the string

placeAnnotation.mapItem.phoneNumber!.components(separatedBy: CharacterSet.decimalDigits.inverted)
    .joined()

Here you go!

I tested and works well.

How to remove special characters in Swift 3

Working in Swift 4.1

import Foundation

extension String {
    var withoutSpecialCharacters: String {
        return self.components(separatedBy: CharacterSet.symbols).joined(separator: "")
    }
}

How to remove special character \u{e2} from string

Thank you every one for your help. You are so kind

I am able to find the invalid character using

phoneNumber?.map{$0.unicodeScalars.allSatisfy{$0.isASCII}}

and it returns

Optional<Array<Bool>>
  ▿ some : 12 elements
    - 0 : false
    - 1 : true
    - 2 : true
    - 3 : true
    - 4 : true
    - 5 : true
    - 6 : true
    - 7 : true
    - 8 : true
    - 9 : true
    - 10 : false
    - 11 : true

I am able to fix this issue using one line

phoneNumber?.filter{$0.unicodeScalars.allSatisfy{$0.isASCII}}

and Count is 10

using

phoneNumber?.filter{$0.unicodeScalars.allSatisfy{$0.isASCII}}.count

Hope it is helpful to others :)

How to strip special characters out of string?

Let's write a function for that (in swift 1.2).

func stripOutUnwantedCharactersFromText(text: String, set characterSet: Set<Character>) -> String {
    return String(filter(text) { set.contains($0) })
}

You can call it like that:

let text = "American Samoa"
let chars = Set("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
let strippedText = stripOutUnwantedCharactersFromText(text, set: chars)

Pure swift. Yeah.

How to remove special characters from the `TextField` in SwiftUI

How about a custom TextField with checks, instead of messing with Binding Wrapper itself:
(with OPs full code to proof that binding works)

struct ContentView: View {
    @State var name = ""
    @State var number = ""
    var body: some View {
        InputField(text: $name, number: $number)
    }
}

struct InputField: View {
    @Binding var text: String
    @Binding var number: String
    var body: some View {
        VStack {
            TextFieldWithCheck("Name here...", text: $text, limit: 15, allowed: .alphanumerics)
                .frame(maxWidth: .infinity, minHeight: 48,  alignment: .leading)

            TextFieldWithCheck("Phone no here...", text: $number, limit: 9, allowed: .decimalDigits)
                .frame(maxWidth: .infinity, minHeight: 48,  alignment: .leading)

        }.padding()
    }
}

// here is the custom TextField itself
struct TextFieldWithCheck: View {
    
    let label: LocalizedStringKey
    @Binding var text: String
    let limit: Int
    let allowed: CharacterSet
    
    init(_ label: LocalizedStringKey, text: Binding<String>, limit: Int = Int.max, allowed: CharacterSet = .alphanumerics) {
        self.label = label
        self._text = Binding(projectedValue: text)
        self.limit = limit
        self.allowed = allowed
    }
    
    var body: some View {
        TextField(label, text: $text)
            .onChange(of: text) { _ in
                // all credits to Leo Dabus:
                text = String(text.prefix(limit).unicodeScalars.filter(allowed.contains))
            }
    }
}

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