AWS Rekognition无法在iOS上初始化

Question

图像内几乎没有甚至没有关于AWS iOS文本识别的文档。我已经完成了AWS创建IAM（具有执行Rekognition等权限）的过程，我从该配置文件在AWS上创建了“移动应用”，并获得了包含在我的项目中的json文件。

我正在初始化AWS“ stack”，在App Delegate中也没有问题

#include <iostream>

using namespace std;

// parametrize true_type 
template <int> using true_int = true_type; // works
template <auto> using true_auto = true_type; // does not work

// detect if T::value() is a valid compile-time expression
template <class T> true_int<(T::value(), void(), 0)> match_int(int);
template <class T> true_auto<(T::value(), void(), 0)> match_auto(int);
template <class> false_type match_int(...); // sometimes called
template <class> false_type match_auto(...); // always called
template <class T>
static constexpr bool has_value_int = decltype(match_int<T>(0))::value;
template <class T>
static constexpr bool has_value_auto = decltype(match_auto<T>(0))::value;

template <class T>
void demo() {
    cout << has_value_int<T> << "(int), " // sometimes false
            << has_value_auto<T> << "(auto)" << endl; // always false
}

int main() {
    struct pass { static constexpr int value() { return 1; } };
    using fail = float;

    cout << "has_value<pass> = "; demo<pass>(); // 1(int), 0(auto)
    cout << "has_value<fail> = "; demo<fail>(); // 0(int), 0(auto)

    return 0;
}

我的ViewController崩溃了：

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.

    AWSDDLog.add(AWSDDTTYLogger.sharedInstance)
    AWSDDLog.sharedInstance.logLevel = .info

    return AWSMobileClient.sharedInstance().interceptApplication(
        application,
        didFinishLaunchingWithOptions: launchOptions)
}

崩溃显示了这一点：

    override func viewDidLoad() {
    super.viewDidLoad()

    let rekognitionClient = AWSRekognition.default() // CRASH HERE BOOM

    let sourceImage = UIImage(named: "corolla")

    let image = AWSRekognitionImage()
    image!.bytes = UIImageJPEGRepresentation(sourceImage!, 0.7)

    guard let request = AWSRekognitionDetectLabelsRequest() else {
        puts("Unable to initialize AWSRekognitionDetectLabelsRequest.")
        return
    }

    request.image = image
    request.maxLabels = 3
    request.minConfidence = 90

    rekognitionClient.detectLabels(request) { (response:AWSRekognitionDetectLabelsResponse?, error:Error?) in
        if error == nil {
            print(response!)
        }
    }

}

据我所知，似乎我应该以某种方式在json文件中配置Rekognition？在AWS网站上创建json文件时，我没有看到该选项...

有什么想法吗？

Answer 1

我在尝试使用其他AWS服务时遇到了相同的问题。像这样将服务添加到我的awsconfiguration.json文件中：

"Rekognition": {
    "Default": {
        "Region": "us-east-1"
    }
}

来源：我在文档中找不到此文件，但SDK为open source