使用 AFNetworking 上传多张图片

Question

我使用PickerController 并将一些图像加载到NSMutableArray。

现在我需要一次上传所有这些图片。我正在使用AFNetworking，我该怎么做？

我浏览了AFNetworking 文档，其中有一个名为Creating an Upload Task for a Multi-Part Request, with Progress 的部分。但是，我无法上传 NSMutableArray 中的图片。

**** 注意：我想将NSMutableArray 中的图像作为字节数组上传。我怎样才能做到这一点？ ****

到目前为止我的代码，

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];

NSURL *URL = [NSURL URLWithString:@"site.com/upload"];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];

Answer 1

UIImage *image1 = [UIImage imageNamed:@"about_app"];
UIImage *image2 = [UIImage imageNamed:@"alter"];
NSArray *array = @[image1,image2];
NSMutableURLRequest *request = [[AFNetWorkSingleton shareInstance] multipartFormRequestWithMethod:@"POST" path:@"Mindex/getimg" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData>formData){
int i = 0;
for(UIImage *eachImage in array)
{
    NSData *imageData = UIImageJPEGRepresentation(eachImage,0.5);
    [formData appendPartWithFileData:imageData name:[NSString stringWithFormat:@"file%d",i ] fileName:[NSString stringWithFormat:@"file%d.jpg",i ] mimeType:@"image/jpeg"];
    i++;
}
}];

试试这个。

Answer 2

-(void)uploadImages{

// image.finalImage - is image itself
// totalCount - Total number of images need to upload on server

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
NSDictionary *parameters = @{@"Key":@"Value",@"Key":@"Value"};
[manager POST:serverURL parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
    [formData appendPartWithFileData:UIImagePNGRepresentation(image.finalImage) name:@"ImageName" fileName:[[Helper getRandomString:8] stringByAppendingString:@".png"] mimeType:@"image/png"];
} success:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSDictionary *jsonResponse = [NSJSONSerialization JSONObjectWithData:(NSData *)responseObject options:kNilOptions error:nil];
    _uploadCounter+=1;
    if(_uploadCounter<totalCount){
        [self uploadImages];
    }else {
        NSLog(@"Uploading all images done");
    }
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    NSLog(@"Error");
}];

}

试试这个，我已经使用此代码在服务器上上传了 10 张图片，并成功上传到了服务器上。

Answer 3

如果您想上传多张图片，并且您希望所有图片的参数名称保持相同，请执行以下操作：

NSDictionary *parameters = @{@"user_key": @"*****"};
NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:queryStringss parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
    NSError *error;
    [formData appendPartWithFileData:imageData name:@"photo_file[0]" fileName:@"Picture44.png" mimeType:@"image/png"];
    [formData appendPartWithFileData:imageData1 name:@"photo_file[1]" fileName:@"Picture45.png" mimeType:@"image/png"];
} error:nil];

通过这种方式，文件将作为数组发送到服务器。

Answer 4

Alamofire 是很好的源/库：

斯威夫特 4：

Alamofire.upload(
    multipartFormData: { multipartFormData in
        multipartFormData.append(unicornImageURL, withName: "unicorn")
        multipartFormData.append(rainbowImageURL, withName: "rainbow")
    },
    to: "https://httpbin.org/post",
    encodingCompletion: { encodingResult in
        switch encodingResult {
        case .success(let upload, _, _):
            upload.responseJSON { response in
                debugPrint(response)
            }
        case .failure(let encodingError):
            print(encodingError)
        }
    }
)

Answer 5

将UIImage 转换为 NSData 的常用技术是使用以下两种方法之一。

NSData *pngData = UIImagePNGRepresentation(myUIImage);
CGFloat quality = 1.0; // ranges from 0 to 1, 0% to 100%
NSData *jpgData = UIImageJPEGRepresentation(myUIImage, quality);

这当然假设您知道您的图像是哪种类型。但是由于您使用PickerController 来获取图像，因此应该很容易确定这一点。您只需提取键 UIImagePickerControllerReferenceURL 下的值并检查 ext 参数。这条评论直观地显示了它https://stackoverflow.com/a/11506499/1529638。