ASI POST上传图片

-( NSDictionary *)addPicWithDictionary:( NSDictionary *)sugestDic{

    NSDictionary *tempDic=nil;

    NSString *url=[ NSString stringWithFormat : @"http://182.50.0.62:8095/xianServer/upload/uploadImage?clientType=mobile" ];

    form = [[[ ASIFormDataRequest alloc ]
            initWithURL :[ NSURL URLWithString :url]] autorelease ];
    [form setTimeOutSeconds : 6 0 .0 ];
    form .delegate = self ;
    //添加拍照图


    //分界线的标识符
    NSString * TWITTERFON_FORM_BOUNDARY = @"AaB03x" ;
    //分界线 --AaB03x
    NSString *MPboundary=[[ NSString alloc ]initWithFormat: @"--%@" ,TWITTERFON_FORM_BOUNDARY];
    //结束符 AaB03x--
    NSString *endMPboundary=[[ NSString alloc ]initWithFormat: @"%@--" ,MPboundary];
    //添加拍照图片
    imageView .image =[ UIImage imageNamed : @"[email protected]" ];
    NSData* data = UIImagePNGRepresentation(imageView .image );
    NSLog( @"%@" ,data);
    //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= [sugestDic 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 : @"files" ])
        {
            //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" ,[sugestDic objectForKey :key]];
        }
    }
    if (imageView .image ) {
        ////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=\" files\"; filename=\"boris .png \"\r\n"];
        //声明上传文件的格式
        [body appendFormat : @"Content-Type: image/png\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 :NSUTF 8 StringEncoding]];
    //将image的data加入
    [myRequestData appendData :data];
    //加入结束符--AaB03x--
    [myRequestData appendData :[end dataUsingEncoding :NSUTF 8 StringEncoding]];
    //设置HTTPHeader中Content-Type的值
    NSString *content=[[ NSString alloc ]initWithFormat: @"multipart/form-data; boundary=%@" ,TWITTERFON_FORM_BOUNDARY];

    [form addRequestHeader : @"Content-Type" value :content];
    [form addRequestHeader : @"Content-Length" value :[ NSString stringWithFormat : @"%d" , [myRequestData length ]]];
    [form setRequestMethod : @"POST" ];
    [form startAsynchronous ];
    [form setDidFailSelector : @selector (requestBeFailed:)];
    [form setDidFinishSelector : @selector (requestBeFinished:)];
    // 解析取得的结果
    return tempDic;
}