Iphone 如何在服务器上动态上传图像？

在我的应用程序中，我想将图像上传到服务器

我可以在服务器上上传图像，但在filename=%@.jpg前面提到了图像的名称。图像保持不变

[body appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"%@.jpg\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

但我想在服务器上保存的图像与它有相同的图像名称。。。。。。 请帮帮我

以下是我的代码：

    -(IBAction)upload:(id)sender
{

    //imageview is a UIImageView 
    NSData *imageData = UIImageJPEGRepresentation(imageView.image, 100);


    // setting up the URL to post to
    NSString *urlString = @"http://url.com/upload/uploader.php?";

    // setting up the request object now

    NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
    [request setURL:[NSURL URLWithString:urlString]];
    [request setHTTPMethod:@"POST"];

    /*
     add some header info now
     we always need a boundary when we post a file
     also we need to set the content type

     You might want to generate a random boundary.. this is just the same 
     as my output from wireshark on a valid html post
     */
    NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"];
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
    [request addValue:contentType forHTTPHeaderField: @"Content-Type"];

    /*
     now lets create the body of the post
     */

    NSMutableData *body = [NSMutableData data];
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];    

    [body appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"%@.jpg\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[NSData dataWithData:imageData]];
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    // setting the body of the post to the reqeust
    [request setHTTPBody:body];

    // now lets make the connection to the web

    NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
    ///self.returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
    NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

    NSLog(@"%@",returnString);


}

改变

[body appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"%@.jpg\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

到

其中filename是一个NSString*变量，具有所需的文件名更改

[body appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"%@.jpg\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

到

其中filename是一个NSString*变量，具有所需的文件名

此行 [body appendData:[[NSString stringWithString:@“内容处理：表单数据；名称=\“userfile\”文件名=\“%@.jpg\”\r\n”]数据使用编码：NSUTF8StringEncoding]

内容类型：图像/jpeg

而不是内容处置：表单数据

并学习如何在这一行中使用内容类型 [body appendData:[[NSString stringWithString:@“内容处理：表单数据；名称=\“userfile\”文件名=\“%@.jpg\”\r\n”]数据使用编码：NSUTF8StringEncoding]

内容类型：图像/jpeg

而不是内容处置：表单数据

并学习如何使用内容类型