如何在Swift中通过字符串的URL获取宽度和高度？

let urlString = "https://example.com/image.jpg"
if let url = URL(string: urlString) {
    // URL对象创建成功
}

if let url = URL(string: urlString) {
    let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
        if let data = data {
            // 成功获取到图像数据
        }
    }
    task.resume()
}

if let url = URL(string: urlString) {
    let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
        if let data = data {
            if let image = UIImage(data: data) {
                let width = image.size.width
                let height = image.size.height
                // 获取图像的宽度和高度
            }
        }
    }
    task.resume()
}