带有小数和长度的Swift TextField限制

class ViewController: UIViewController, UITextFieldDelegate {
    @IBOutlet weak var textField: UITextField!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        textField.delegate = self
    }
    
    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        // 判断是否是小数位数限制
        if textField == self.textField {
            let currentText = textField.text ?? ""
            let newText = (currentText as NSString).replacingCharacters(in: range, with: string)
            
            // 使用正则表达式判断输入的内容是否为小数
            let decimalRegex = "^\\d*\\.?\\d*$"
            let decimalPredicate = NSPredicate(format: "SELF MATCHES %@", decimalRegex)
            let isDecimal = decimalPredicate.evaluate(with: newText)
            
            // 设置小数位数限制为2位
            let decimalLimit = 2
            
            if isDecimal && newText.components(separatedBy: ".").last?.count ?? 0 <= decimalLimit {
                return true
            } else {
                return false
            }
        }
        
        // 判断是否是长度限制
        // 设置长度限制为10位
        let lengthLimit = 10
        let currentText = textField.text ?? ""
        let newText = (currentText as NSString).replacingCharacters(in: range, with: string)
        
        if newText.count <= lengthLimit {
            return true
        } else {
            return false
        }
    }
}