iOS上传文件

NSString *boundry =@"boundry";//分节符

NSMutableURLRequest*mutableRequest = [NSMutableURLRequestrequestWithURL:[NSURLURLWithString:@"服务器地址"]];

[mutableRequestsetHTTPMethod:@"POST"];

NSMutableDictionary*head = [NSMutableDictionarydictionaryWithObjectsAndKeys:[NSStringstringWithFormat:@"multipart/form-data; boundary=%@", boundry],@"Content-Type",nil];

[mutableRequestsetAllHTTPHeaderFields:head];

NSMutableString*mutableString = [[NSMutableStringalloc]init];

[mutableStringappendFormat:@"--%@\r\n", boundry];

[mutableStringappendFormat: @"Content-Disposition: form-data; name=\"image\"; filename=\"image.png\"\r\n\r\n"];//name + filename 自己看着来，其他就不要换了

NSMutableData *postData = [NSMutableDatadataWithCapacity:[imageDatalength] +512];

[postData appendData:[mutableString dataUsingEncoding:NSUTF8StringEncoding]];

[postDataappendData:imageData];//插入要上传的文件数据（NSData）

[postDataappendData:

[[NSStringstringWithFormat:@"\r\n--%@--\r\n", boundry] dataUsingEncoding:NSUTF8StringEncoding]];

[mutableRequestsetHTTPBody:postData];

NSData*received = [NSURLConnectionsendSynchronousRequest:mutableRequest returningResponse:nilerror:nil];