Google Vision的文本检测问题

Question

不确定问题是什么，因为我的代码只是整夜停止工作，但是Google Vision上的文本检测要么返回nil，要么返回主题上不存在的单词。

这是我的请求功能：

func createRequest(with imageBase64: String) {

    let jsonRequest = [
        "requests": [
            "image": [
                "content": imageBase64 ],
            "features": [
                ["type": "TEXT_DETECTION"],
                ["type": "IMAGE_PROPERTIES"]
            ]
        ]
    ]

    let jsonData = try? JSONSerialization.data(withJSONObject: jsonRequest)
    var request = URLRequest(url: googleURL)
    request.httpMethod = "POST"
    request.addValue("application/json", forHTTPHeaderField: "Content-Type")
    request.addValue(Bundle.main.bundleIdentifier ?? "", forHTTPHeaderField: "X-Ios-Bundle-Identifier")

    request.httpBody = jsonData

    DispatchQueue.global().async {
        let task: URLSessionDataTask = self.URLsession.dataTask(with: request) { (encodedObject, response, error) in
            guard let data = encodedObject, error == nil else {
                print(error?.localizedDescription ?? "no data")
                return
            }
            self.analyzeResults(data)
        }
        task.resume()
    }
}

我的分析结果功能的一部分：

func analyzeResults(_ data: Data) {
    DispatchQueue.main.async {
        guard let response = try? JSONDecoder().decode(Root.self, from: data) else { return }
        guard let responseArray = response.responses else { return }
        print(response)