- (IBAction)uploadButton:(id)sender {

UIImage *image = [UIImage imageNamed:@"1.jpg"];

NSData *imageData = http://www.mamicode.com/UIImageJPEGRepresentation(image,

0.5);

NSString *urlString =@"http://192.168.1.113:8090/

NSMutableURLRequest *request = [[NSMutableURLRequest

alloc] init] ;

[request setURL:[NSURL URLWithString:urlString]];

[request setHTTPMethod:@"POST"];

NSString *boundary = [NSString

stringWithString:@"---------------------------14737809831

466499882746641449"];

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=\"2.png\"\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 = http://www.mamicode.com/[NSURLConnection

sendSynchronousRequest:request returningResponse:nilerror:nil];

NSString *returnString = [[NSString alloc]

initWithData:returnData encoding:NSUTF8StringEncoding];

NSLog(@"3-%@",returnString);

UIImage *myImage = [UIImage imageWithData:returnData];

[imageView setImage:myImage];

[self.view addSubview:imageView];

上传图片的实现