问将图像从UIImage上传为JPEG和其他后置数据。

EN

- (void)uploadImage:(UIImage *)image toURL:(NSURL *)url withTitle:(NSString *)title {

  // encode the image as JPEG
  NSData *imageData = UIImageJPEGRepresentation(image, 0.9);

  // set up the request
  NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
  [request setURL:url];

  // create a boundary to delineate the file
  NSString *boundary = @"14737809831466499882746641449";
  // tell the server what to expect
  NSString *contentType = 
    [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];
  [request addValue:contentType forHTTPHeaderField: @"Content-Type"];

  // make a buffer for the post body
  NSMutableData *body = [NSMutableData data];

  // add a boundary to show where the title starts
  [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n", boundary] 
    dataUsingEncoding:NSASCIIStringEncoding]];

  // add the title
  [body appendData:[
    @"Content-Disposition: form-data; name=\"title\"\r\n\r\n"
    dataUsingEncoding:NSASCIIStringEncoding]];
  [body appendData:[title
    dataUsingEncoding:NSASCIIStringEncoding]];

  // add a boundary to show where the file starts
  [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n", boundary] 
    dataUsingEncoding:NSASCIIStringEncoding]];

  // add a form field
  [body appendData:[
    @"Content-Disposition: form-data; name=\"picture\"; filename=\"image.jpeg\"\r\n"
    dataUsingEncoding:NSASCIIStringEncoding]];

  // tell the server to expect some binary
  [body appendData:[
    @"Content-Type: application/octet-stream\r\n"
    dataUsingEncoding:NSASCIIStringEncoding]];
  [body appendData:[
    @"Content-Transfer-Encoding: binary\r\n"
    dataUsingEncoding:NSASCIIStringEncoding]];
  [body appendData:[[NSString stringWithFormat:
    @"Content-Length: %i\r\n\r\n", imageData.length]
    dataUsingEncoding:NSASCIIStringEncoding]];

  // add the payload
  [body appendData:[NSData dataWithData:imageData]];

  // tell the server the payload has ended
  [body appendData:
    [[NSString stringWithFormat:@"\r\n--%@--\r\n", boundary] 
    dataUsingEncoding:NSASCIIStringEncoding]];

  // add the POST data as the request body
  [request setHTTPMethod:@"POST"];
  [request setHTTPBody:body];

  // now lets make the connection to the web
  NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
  NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

  NSLog(@"%@", returnString);
}