如何根据Swift 4中来自UISlider的值，使用JSON中的数据来更改UITextfield文本？

let slider = UISlider()
slider.minimumValue = 0
slider.maximumValue = 100
slider.value = 50

let textField = UITextField()
textField.text = "默认文本"

slider.addTarget(self, action: #selector(sliderValueChanged(_:)), for: .valueChanged)

@objc func sliderValueChanged(_ sender: UISlider) {
    let json = """
    {
        "0": "文本1",
        "25": "文本2",
        "50": "文本3",
        "75": "文本4",
        "100": "文本5"
    }
    """
    
    if let jsonData = json.data(using: .utf8) {
        do {
            let jsonObject = try JSONSerialization.jsonObject(with: jsonData, options: [])
            
            if let dict = jsonObject as? [String: String] {
                let value = Int(sender.value)
                
                if let newText = dict[String(value)] {
                    textField.text = newText
                }
            }
        } catch {
            print("JSON解析错误：\(error)")
        }
    }
}