ios - AFNetworking 使用 PUT 请求上传图片？

Question

我正在尝试通过 PUT 请求使用 AFNetworking 将图像上传到服务器。-

     UIImage* snap = info[UIImagePickerControllerOriginalImage];
      NSData *imageData = UIImageJPEGRepresentation(snap, 0.3);
      NSMutableString * fullPath = [NSMutableString stringWithString:API_BASE_URL];
    [fullPath appendFormat:@"%@%@",API_VERSION,req];
    NSURL * url = [NSURL URLWithString:fullPath];

   AFHTTPRequestOperationManager *manager = [[AFHTTPRequestOperationManager alloc] initWithBaseURL:url];

    [manager.requestSerializer setValue:[NSString stringWithFormat:@"%@", @kPublicKey] forHTTPHeaderField:@"X-API-KEY"];
    [manager.requestSerializer setValue:bodyStr forHTTPHeaderField:@"X-API-DATA"];
    NSString *URLString = fullPath;

    NSMutableURLRequest *request = [manager.requestSerializer multipartFormRequestWithMethod:@"PUT" URLString:URLString parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        [formData appendPartWithFileData:imageData name:@"media" fileName:@"upload.jpg" mimeType:@"image/jpeg"];
    } error:nil];


   AFHTTPRequestOperation *requestOperation = [manager HTTPRequestOperationWithRequest:request success:^(AFHTTPRequestOperation *operation, id responseObject) {

      //success
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {

         NSLog(@"failure...");

    }];

    [requestOperation start];

我正在使用 iPhone 相机拍摄图像并将其上传到服务器，但处理时间太长，上传到服务器的图像尺寸很大(~10-12MB)，尽管我正在尝试压缩图像？我做错了什么？任何建议或示例代码将不胜感激。

Answer 1

NSData *imageData = UIImageJPEGRepresentation(snap, 1.0);

UIImageJPEGRepresentation 中的第二个参数表示图像的压缩质量。根据 Apple 文档:

compressionQuality :
The quality of the resulting JPEG image, expressed as a value from 0.0 to 1.0. The value 0.0 represents the maximum compression (or lowest quality) while the value 1.0 represents the least compression (or best quality).

尝试将其减少到一个平衡图像质量和上传速度的数字。