ios - 将 base 64 图像字符串发布到 iOS 上的服务器

Question

据我了解，要使用该网站，我必须将图像转换为 base64 编码图像，然后将其发送到该网站。然后网站会发回一个数字(小数形式)。

https://docs.indico.io/docs/rest-api-image-analysis

我已尝试使用多个步骤，即尝试更改用于发送文本和接收数字的类似过程。有什么建议吗？

更新:

 - (IBAction)press:(id)sender {

    //UIImage *imager = photos.image;

 NSData *imageData = UIImageJPEGRepresentation(photos.image, 1.0);
    NSString *base64Img = [imageData base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithLineFeed];

    //not sure if @"data" or @"data.json" and whether the base64img should be behind it
    NSDictionary *parameters = @{@"data":base64Img};

    NSMutableString *parameterString = [NSMutableString string];
    for (NSString *key in [parameters allKeys]) {
        if ([parameterString length]) {
            [parameterString appendString:@"&"];
        }
        [parameterString appendFormat:@"%@=%@", key, parameters[key]];

        NSURL *url = [NSURL URLWithString:@"http://apiv2.indico.io/contentfiltering?key='17767cb46eb4b4f568832be2c953022b"];
        NSURLSession *session = [NSURLSession sharedSession];
        NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
        [request setHTTPMethod:@"POST"];
        [request setHTTPBody:[parameterString dataUsingEncoding:NSUTF8StringEncoding]];
        NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
            if (!error) {
                if ([data length]) {
                    NSDictionary *jsonResponse = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
                    //GET RESULT;
                    NSLog(@"A %@", parameters[@"results"]);

                }

            } else {
                NSLog(@"%@", error);
            }
        }];
        [task resume];

    }

我得到的结果通常返回为 (null)

Answer 1

也许去试试

NSDictionary *parameters = @{@"data":base64Img};

NSError *error;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:parameters
                   options:nil
                     error:&error];

//do some error checking

NSURL *url = [NSURL URLWithString:@"http://apiv2.indico.io/contentfiltering?key='17767cb46eb4b4f568832be2c953022b"];
NSURLSession *session = [NSURLSession sharedSession];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:@"POST"];
[request setHTTPBody:jsonData];

//...

只是在我的脑海里做这件事，所以可能需要一些调整