SwiftUI, TextField, 入力制限、英数字

 

英数字のみ

TextField("Input", text: $input)

.onChange(of:input, perform: filter)

func filter(value: String) {

        let validCodes = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"

        let sets = CharacterSet(charactersIn: validCodes)

        input = String(value.unicodeScalars.filter(sets.contains).map(Character.init))

        

        if 10 < input.count {

            input = String(input.prefix(10))

        }

    }

https://zenn.dev/yorifuji/articles/swiftui-textfield-filter