iOS批量上传图片（多图上传）

#import <Foundation/Foundation.h>

@interface PicUpload : NSObject
+ (NSString *)postRequestWithURL: (NSString *)url  // IN
                      postParems: (NSMutableDictionary *)postParems // IN
                     picFilePath: (NSMutableArray *)picFilePath  // IN
                     picFileName: (NSMutableArray *)picFileName ;


@end

.m文件实现


//  Copyright (c) 2014年 Clover. All rights reserved.

#import "PicUpload.h"
#import "SVProgressHUD.h"
#import "SBJson.h"
#import "Singleton.h"
@implementation PicUpload
static NSString * const FORM_FLE_INPUT = @"file1";

+ (NSString *)postRequestWithURL: (NSString *)url
                      postParems: (NSMutableDictionary *)postParems
                     picFilePath: (NSMutableArray *)picFilePath
                     picFileName: (NSMutableArray *)picFileName
{
    
    
     NSString *hyphens = @"--";
     NSString *boundary = @"*****";
     NSString *end = @"\r\n";
    
    NSMutableData *myRequestData1=[NSMutableData data];
    //遍历数组，添加多张图片
    for (int i = 0; i < picFilePath.count; i ++) {
        NSData* data;
        UIImage *image=[UIImage imageWithContentsOfFile:[picFilePath objectAtIndex:i]];
        //判断图片是不是png格式的文件
        if (UIImagePNGRepresentation(image)) {
            //返回为png图像。
            data = UIImagePNGRepresentation(image);
        }else {
            //返回为JPEG图像。
            data = UIImageJPEGRepres