iOS实现上传图片到服务器

当然如果你的项目大的话最好使用开源的网络库ASI或者AFNetWork,库里面都有现有的方法，

如果你觉得就是想自己写一个，看这里

- (NSMutableURLRequest *)PostImageRequest:(NSString *)URLString                                    UIImage:(UIImage*)image                                 parameters:(NSDictionary *)parameters                                    success:(void (^)(id))success                                    failure:(void (^)(NSError *))failure  {      _success = success;      _failure = failure;      //分界线的标识符      NSString *TWITTERFON_FORM_BOUNDARY = @"AaB03x";      //根据url初始化request      _request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:URLString]                                                             cachePolicy:NSURLRequestReloadIgnoringLocalCacheData                                                         timeoutInterval:10];      //分界线 --AaB03x      NSString *MPboundary=[[NSString alloc]initWithFormat:@"--%@",TWITTERFON_FORM_BOUNDARY];      //结束符 AaB03x--      NSString *endMPboundary=[[NSString alloc]initWithFormat:@"%@--",MPboundary];      //得到图片的data      NSData* data = UIImageJPEGRepresentation(image, 1);      //http body的字符串      NSMutableString *body=[[NSMutableString alloc]init];      //参数的集合的所有key的集合      NSArray *keys= [parameters allKeys];        //遍历keys      for(int i=0;i<[keys count];i++)      {          //得到当前key          NSString *key=[keys objectAtIndex:i];          //如果key不是pic，说明value是字符类型，比如name：Boris          if(![key isEqualToString:@"pic"])          {              //添加分界线，换行              [body appendFormat:@"%@\r\n",MPboundary];              //添加字段名称，换2行              [body appendFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n",key];              //添加字段的值              [body appendFormat:@"%@\r\n",[parameters objectForKey:key]];          }      }        ////添加分界线，换行      [body appendFormat:@"%@\r\n",MPboundary];      //声明pic字段，文件名为boris.png      [body appendFormat:@"Content-Disposition: form-data; name=\"ImageField\"; filename=\"x1234.png\"\r\n"];      //声明上传文件的格式      [body appendFormat:@"Content-Type: image/jpeg\r\n\r\n"];        //声明结束符：--AaB03x--      NSString *end=[[NSString alloc]initWithFormat:@"\r\n%@",endMPboundary];      //声明myRequestData，用来放入http body      NSMutableData *myRequestData=[NSMutableData data];      //将body字符串转化为UTF8格式的二进制      [myRequestData appendData:[body dataUsingEncoding:NSUTF8StringEncoding]];      //将image的data加入      [myRequestData appendData:data];      //加入结束符--AaB03x--      [myRequestData appendData:[end dataUsingEncoding:NSUTF8StringEncoding]];        //设置HTTPHeader中Content-Type的值      NSString *content=[[NSString alloc] initWithFormat:@"multipart/form-data; boundary=%@",TWITTERFON_FORM_BOUNDARY];      //设置HTTPHeader      [_request setValue:content forHTTPHeaderField:@"Content-Type"];      //设置Content-Length      [_request setValue:[NSString stringWithFormat:@"%d", [myRequestData length]] forHTTPHeaderField:@"Content-Length"];      //设置http body      [_request setHTTPBody:myRequestData];      //http method      [_request setHTTPMethod:@"POST"];            return _request;  }

- (void)start  {      if (_request) {          _urlConnection = [[NSURLConnection alloc]initWithRequest:_request delegate:self];      }      _request = nil;  }    - (void)syncStart  {      if (_request) {          NSError *error;          NSData *returnData = [NSURLConnection sendSynchronousRequest:_request returningResponse:nil error:&error];          if (!error) {              NSString *receiveStr = [[NSString alloc]initWithData:returnData encoding:NSUTF8StringEncoding];              _success(receiveStr);          } else {              _failure(error);          }      }      _request = nil;  }

#pragma mark ---- NSURLConnectionDataDelegate -----  - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response  {      //NSHTTPURLResponse *res = (NSHTTPURLResponse *)response;      //NSLog(@"%@",[res allHeaderFields]);  }    -(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data  {      [_responseData appendData:data];  }    -(void)connectionDidFinishLoading:(NSURLConnection *)connection  {      NSString *receiveStr = [[NSString alloc]initWithData:_responseData encoding:NSUTF8StringEncoding];      _success(receiveStr);  }    #pragma mark ---- NSURLConnectionDelegate -----  - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error  {      _failure(error);  }

使用方法：

[httpManager PostImageRequest:UploadImageUrl                            UIImage:image                         parameters:params                            success:^(id msg) {                                debugLog(@"upload image success:%@", msg);                                success(msg);                                                       } failure:^(NSError *error) {                                failure(error);                            }];            [httpManager start];

NSURLConnection的使用方法就不细说了，查看查询文档或者到网上找

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iOS实现上传图片到服务器