Swift API URLSession不会将字符串附加到本地字符串数组中

var stringArray = [String]()

let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
    if let error = error {
        print("Error: \(error)")
        return
    }
    
    if let data = data {
        // 在这里处理返回的数据
    }
}

if let dataString = String(data: data, encoding: .utf8) {
    stringArray.append(dataString)
}

var stringArray = [String]()

let url = URL(string: "https://example.com")!
let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
    if let error = error {
        print("Error: \(error)")
        return
    }
    
    if let data = data {
        if let dataString = String(data: data, encoding: .utf8) {
            stringArray.append(dataString)
        }
    }
}

task.resume()