UITextfiled验证1- 100之间的国家/地区货币

import UIKit

class ViewController: UIViewController, UITextFieldDelegate {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let textField = UITextField(frame: CGRect(x: 50, y: 100, width: 200, height: 30))
        textField.borderStyle = .roundedRect
        textField.delegate = self
        self.view.addSubview(textField)
    }
    
    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        // 获取用户输入的文本
        let currentText = textField.text ?? ""
        let newText = (currentText as NSString).replacingCharacters(in: range, with: string)
        
        // 验证输入是否为1-100之间的数字
        if let number = Int(newText), number >= 1 && number <= 100 {
            // 符合要求的处理逻辑
            // ...
            return true
        } else {
            // 不符合要求的处理逻辑
            let alertController = UIAlertController(title: "提示", message: "请输入1-100之间的数字", preferredStyle: .alert)
            alertController.addAction(UIAlertAction(title: "确定", style: .default, handler: nil))
            self.present(alertController, animated: true, completion: nil)
            return false
        }
    }
}