“无法打开文件”IMG_xxxx.JPG“，因为没有这样的文件。”

Question

我正在尝试将图像选择器中选择的图像传递给API。为此，我必须传递图像的完整路径。我目前正在做的是找到图像名称和图像的文件路径，将名称附加到文件路径上。即使我将此完整路径传递给API，我仍然会收到下面描述的错误：

Error Domain=NSCocoaErrorDomain Code=260 "The file “IMG_0082.JPG” couldn’t be opened because there is no such file." UserInfo={NSFilePath=/private/var/mobile/Containers/Data/Application/C7C8D8A8-B9E7-4E4E-B35C-DBFB061804D6/tmp/IMG_0082.JPG, NSUnderlyingError=0x14fb200f0 {Error Domain=NSPOSIXErrorDomain Code=2 "No such file or directory"}}

问题是什么？我在下面附上了我的完整imagePickerController方法。

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info
{
    // Dismiss image picker
    [picker dismissViewControllerAnimated:YES completion:nil];

    // Classify image
    UIImage *image = [info objectForKey:@"UIImagePickerControllerEditedImage"];

    // Get image name
    NSURL *refURL = [info valueForKey:UIImagePickerControllerReferenceURL];
    PHFetchResult *result = [PHAsset fetchAssetsWithALAssetURLs:@[refURL] options:nil];
    NSString *filename = [[result firstObject] filename];

    // Get image file path and append file name onto it
    NSData *imageData = UIImagePNGRepresentation(image);
    NSString *path = [NSTemporaryDirectory() stringByAppendingPathComponent:filename];
    [imageData writeToFile:path atomically:YES];

    NSDictionary *headers = @{ @"content-type": @"multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW",
                               @"Content-Type": @"multipart/form-data",
                               @"Accept": @"application/json",
                               @"Authorization": @"Token 60f6be2a21bdf731d86a8817b440a1afba692fed",
                               @"Cache-Control": @"no-cache",
                               @"Postman-Token": @"79ca63d8-1bdc-f3e3-13cd-9bc18b68caa0" };
    NSArray *parameters = @[ @{ @"name": @"task", @"value": @"4b363547-58da-48a8-b76d-8877dd816d13" },
                             @{ @"name": @"image_file", @"fileName": @"/private/var/mobile/Containers/Data/Application/C7C8D8A8-B9E7-4E4E-B35C-DBFB061804D6/tmp/IMG_0082.JPG" } ];
    NSString *boundary = @"----WebKitFormBoundary7MA4YWxkTrZu0gW";

    NSError *error;
    NSMutableString *body = [NSMutableString string];
    for (NSDictionary *param in parameters) {
        [body appendFormat:@"--%@\r\n", boundary];
        if (param[@"fileName"]) {
            [body appendFormat:@"Content-Disposition:form-data; name=\"%@\"; filename=\"%@\"\r\n", param[@"name"], param[@"fileName"]];
            [body appendFormat:@"Content-Type: %@\r\n\r\n", param[@"contentType"]];
            [body appendFormat:@"%@", [NSString stringWithContentsOfFile:param[@"fileName"] encoding:NSUTF8StringEncoding error:&error]];
            if (error) {
                NSLog(@"%@", error);
            }
        } else {
            [body appendFormat:@"Content-Disposition:form-data; name=\"%@\"\r\n\r\n", param[@"name"]];
            [body appendFormat:@"%@", param[@"value"]];
        }
    }
    [body appendFormat:@"\r\n--%@--\r\n", boundary];
    NSData *postData = [body dataUsingEncoding:NSUTF8StringEncoding];

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"https://api.vize.ai/v1/classify/"]
                                                           cachePolicy:NSURLRequestUseProtocolCachePolicy
                                                       timeoutInterval:10.0];
    [request setHTTPMethod:@"POST"];
    [request setAllHTTPHeaderFields:headers];
    [request setHTTPBody:postData];

    NSURLSession *session = [NSURLSession sharedSession];
    NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request
                                                completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
                                                    if (error) {
                                                        NSLog(@"%@", error);
                                                    } else {
                                                        NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *) response;
                                                        NSLog(@"%@", httpResponse);
                                                    }
                                                }];
    [dataTask resume];

Answer 1

数组中的第二个参数不应该是您编写文件的位置吗？

所以这...

NSArray *parameters = @[ @{ @"name": @"task", @"value": @"4b363547-58da-48a8-b76d-8877dd816d13" },
                         @{ @"name": @"image_file", @"fileName": @"/private/var/mobile/Containers/Data/Application/C7C8D8A8-B9E7-4E4E-B35C-DBFB061804D6/tmp/IMG_0082.JPG" } ];

应该

NSArray *parameters = @[ @{ @"name": @"task", @"value": @"4b363547-58da-48a8-b76d-8877dd816d13" },
                         @{ @"name": @"image_file", @"fileName": path} ];