经过研究，我已经想出了如何将图像上传到我的服务器
NSData *imageData = UIImageJPEGRepresentation([UIImage imageNamed:@"smiley1.jpg"], 90);
NSString *urlString = @"http://www.mysite.com/edit_profile.php";
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:@"POST"];
NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"];
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
[request addValue:contentType forHTTPHeaderField: @"Content-Type"];
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=\"ipodfile.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]];
[request setHTTPBody:body];
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
[[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
PHP：
$newname = "image01.jpg";
$place_file = move_uploaded_file( $_FILES['userfile']['tmp_name'], "members/$id/".$newname) or die("FAILED to Upload");
但是，如果我不需要，我不想使用NSMutableURLRequest，应用程序中的其他内容我一直在使用ASIFormDataRequest，我也想用它来上传图像
以下是我尝试过的方法，但失败了：
NSURL *url = [NSURL URLWithString:@"http://www.mysite.com/edit_profile.php"];
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"];
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
NSData *imageData = UIImageJPEGRepresentation([UIImage imageNamed:@"smiley1.jpg"], 90);
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=\"ipodfile.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]];
[request setPostValue:contentType forKey:@"Content-Type"];
[request setPostBody:body];
[request setDelegate:self];
[request startAsynchronous];
提前致谢!!