iOS多张图片上传

+ (NSString *)postRequestWithURL: (NSString *)url  // IN
postParems: (NSMutableDictionary *)postParems // IN
array: (NSArray *)array  // IN
picFileName: (NSArray *)picFileName  // IN
{
NSString *TWITTERFON_FORM_BOUNDARY = @"0xKhTmLbOuNdArY";
//根据url初始化request
NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:url]
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];
//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= [postParems allKeys];

//遍历keys
for(int i=0;i<[keys count];i++)
{
//得到当前key
NSString *key=[keys objectAtIndex:i];

//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=\"param_%@\"\r\n\r\n",key];
//添加字段的值
[body appendFormat:@"%@\r\n",[postParems objectForKey:key]];

NSLog(@"添加字段的值==%@",[postParems objectForKey:key]);
}

//    if(picFilePath){
////添加分界线，换行
//    }
NSString *end=[[NSString alloc]initWithFormat:@"\r\n%@",endMPboundary];
//声明myRequestData，用来放入http body
NSMutableData *myRequestData=[NSMutableData data];
int i = 0;
for (NSData *data in array) {

[body appendFormat:@"%@\r\n",MPboundary];

//声明pic字段，文件名为boris.png
[body appendFormat:@"Content-Disposition: form-data; name=\"%@%d\"; filename=\"%@\"\r\n",FORM_FLE_INPUT,i++,picFileName[i-1]];
//声明上传文件的格式
[body appendFormat:@"Content-Type: image/jpge,image/gif, image/jpeg, image/pjpeg, image/pjpeg,image/jpg\r\n\r\n"];

//声明结束符：--AaB03x--

//将body字符串转化为UTF8格式的二进制
[myRequestData appendData:[body dataUsingEncoding:NSUTF8StringEncoding]	];
//    if(picFilePath){
//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"];
[request setValue:@"keep-alive" forHTTPHeaderField:@"Connection"];
//    [request setValue:@"utf-8" forKey:@"Charset"];

//设置Content-Length
//    [request setValue:[NSString stringWithFormat:@"%ld", [myRequestData length]] forHTTPHeaderField:@"Content-Length"];
//http method
[request setHTTPMethod:@"POST"];
//设置http body
[request setHTTPBody:myRequestData];

NSHTTPURLResponse *urlResponese = nil;
NSError *error = [[NSError alloc]init];
NSData* resultData = [NSURLConnection sendSynchronousRequest:request   returningResponse:&urlResponese error:&error];

NSString* result= [[NSString alloc] initWithData:resultData encoding:NSUTF8StringEncoding];

if([urlResponese statusCode] >=200&&[urlResponese statusCode]<300){
NSLog(@"返回结果=====%@",result);
return result;
}
return nil;
}