如何在 swift 中使用 “ 和 ' 单引号和双引号过滤？-解网

问：

我想做一个应该过滤掉特殊字符的函数。就像如果用户在文本区域上输入任何内容一样，如果他/她输入特殊字符，那么它将抛出并发出警报弹出窗口。现在它几乎适用于所有字符，除了单引号和双引号，我也想包括 [ “ 和 ' ]。谁能帮我解决这个问题。非常感谢！！！

    func textViewDidChange(_ textView: UITextView) {
        guard var textViewText = textView.text else {
            return
        }
        var specialCharacterSet = CharacterSet(charactersIn: "₹!@#$%^&*()_+{}[]|<>?;=-")
        specialCharacterSet.insert(charactersIn: "'")
        

        if let range = textViewText.rangeOfCharacter(from: specialCharacterSet) {
            textViewText = textViewText.replacingCharacters(in: range, with: "")
            textView.text = textViewText

            let alertController = UIAlertController(title: "Error", message: "Special characters are not allowed!", preferredStyle: .alert)
            alertController.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
            present(alertController, animated: true, completion: nil)
        }
    }

iOS Swift 字符串

func setText()
{
    var textViewText = self.txtview?.text ?? ""
    let specialCharacterSet = CharacterSet(charactersIn: "₹!@#$%^&*()_+{}[]|<>?;=-'\"")
    
    if let range = textViewText.rangeOfCharacter(from: specialCharacterSet) {
        textViewText = textViewText.replacingCharacters(in: range, with: "")
        self.txtview?.text = textViewText
        
        let alertController = UIAlertController(title: "Error", message: "Special characters are not allowed!", preferredStyle: .alert)
        alertController.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
        present(alertController, animated: true, completion: nil)
    }
}

如何在 swift 中使用 “ 和 ' 单引号和双引号过滤？

How to use " and ' single quote and double quote filtering in swift?

评论

评论