iOS多圖片上傳

    +(NSString )PostImagesToServer:(NSString ) strUrl dicPostParams:(NSMutableDictionary )params dicImages:(NSMutableDictionary ) dicImages{

        NSString * res;


    //分界線的標識符  
    NSString *TWITTERFON_FORM_BOUNDARY = @"AaB03x";  
    //根據url初始化request  
    //NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:strUrl] cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:10];  

    NSURL *url = [NSURL URLWithString:strUrl];  
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];  
    //分界線 --AaB03x  
    NSString *MPboundary=[[NSString alloc]initWithFormat:@"--%@",TWITTERFON_FORM_BOUNDARY];  
    //結束符 AaB03x--  
    NSString *endMPboundary=[[NSString alloc]initWithFormat:@"%@--",MPboundary];  
    //要上傳的圖片  
    UIImage *image;//=[params objectForKey:@"pic"];  
    //得到圖片的data  
    //NSData* data = UIImagePNGRepresentation(image);  
    //http body的字符串  
    NSMutableString *body=[[NSMutableString alloc]init];  
    //參數的集合的所有key的集合  
    NSArray *keys= [params allKeys];  

    //遍歷keys  
    for(int i=0;i<[keys count];i++) {  
        //得到當前key  
        NSString *key=[keys objectAtIndex:i];  
        //如果key不是pic，說明value是字符類型，比如name：Boris  
        //if(![key isEqualToString:@"pic"]) {  
            //添加分界線，換行  
            [body appendFormat:@"%@\r\n",MPboundary];  
            //添加字段名稱，換2行  
            [body appendFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n",key];  
            //[body appendString:@"Content-Transfer-Encoding: 8bit"];  
            //添加字段的值  
            [body appendFormat:@"%@\r\n",[params objectForKey:key]];  
        //}  
    }  
    ////添加分界線，換行  
    //[body appendFormat:@"%@\r\n",MPboundary];  

    //聲明myRequestData，用來放入http body  
    NSMutableData *myRequestData=[NSMutableData data];  
    //將body字符串轉化為UTF8格式的二進制  
    [myRequestData appendData:[body dataUsingEncoding:NSUTF8StringEncoding]];  

    //循環加入上傳圖片  
    keys = [dicImages allKeys];  
    for(int i = 0; i< [keys count] ; i++){  
        //要上傳的圖片  
        image = [dicImages objectForKey:[keys objectAtIndex:i ]];  
        //得到圖片的data  
        NSData* data =  UIImageJPEGRepresentation(image, 0.0);  
        NSMutableString *imgbody = [[NSMutableString alloc] init];  
        //此處循環添加圖片文件  
        //添加圖片信息字段  
        //聲明pic字段，文件名為boris.png  
        //[body appendFormat:[NSString stringWithFormat: @"Content-Disposition: form-data; name=\"File\"; filename=\"%@\"\r\n", [keys objectAtIndex:i]]];  

        ////添加分界線，換行  
        [imgbody appendFormat:@"%@\r\n",MPboundary];  
        [imgbody appendFormat:@"Content-Disposition: form-data; name=\"File%d\"; filename=\"%@.jpg\"\r\n", i, [keys objectAtIndex:i]];  
        //聲明上傳文件的格式  
        [imgbody appendFormat:@"Content-Type: application/octet-stream; charset=utf-8\r\n\r\n"];  

        NSLog(@"上傳的圖片：%d  %@", i, [keys objectAtIndex:i]);  

        //將body字符串轉化為UTF8格式的二進制  
        //[myRequestData appendData:[body dataUsingEncoding:NSUTF8StringEncoding]];  
        [myRequestData appendData:[imgbody dataUsingEncoding:NSUTF8StringEncoding]];  
        //將image的data加入  
        [myRequestData appendData:data];  
        [myRequestData appendData:[ @"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];  
    }  
    //聲明結束符：--AaB03x--  
    NSString *end=[[NSString alloc]initWithFormat:@"%@\r\n",endMPboundary];  
    //加入結束符--AaB03x--  
    [myRequestData appendData:[end dataUsingEncoding:NSUTF8StringEncoding]];  

    //設置HTTPHeader中Content-Type的值  
    NSString *content=[[NSString alloc]initWithFormat:@"multipart/form-data; boundary=%@",TWITTERFON_FORM_BOUNDARY];  
    //設置HTTPHeader  
    [request setValue:content forHTTPHeaderField:@"Content-Type"];  
    //[request setValue:@"keep-alive" forHTTPHeaderField:@"connection"];  
    //[request setValue:@"UTF-8" forHTTPHeaderField:@"Charsert"];  
    //設置Content-Length  
    [request setValue:[NSString stringWithFormat:@"%lu", (unsigned long)[myRequestData length]] forHTTPHeaderField:@"Content-Length"];  
    //設置http body  
    [request setHTTPBody:myRequestData];  
    //http method  
    [request setHTTPMethod:@"POST"];  

    //建立連接，設置代理  
    //NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];  

    //設置接受response的data  
         NSData *mResponseData;  
    NSError *err = nil;  
    mResponseData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:&err];  

    if(mResponseData == nil){  
        NSLog(@"err code : %@", [err localizedDescription]);  
    }  
    res = [[NSString alloc] initWithData:mResponseData encoding:NSUTF8StringEncoding];  
    /* 
    if (conn) { 
        mResponseData = [NSMutableData data]; 
        mResponseData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:&err]; 

        if(mResponseData == nil){ 
            NSLog(@"err code : %@", [err localizedDescription]); 
        } 
        res = [[NSString alloc] initWithData:mResponseData encoding:NSUTF8StringEncoding]; 
    }else{ 
        res = [[NSString alloc] init]; 
    }*/  
    NSLog(@"服務器返回：%@", res);  
    return res;  
}  </pre>