iOS 图片base64编码 上传

一直上传不成功，搜了N遍，尝试了N遍，终于找到了一个相关的，如下：

你可以看一下你传到后台后的数据，看看是不是收到的数据跟你上传的数据不一样。base64编码之后，data里面会含有一些“+”，而“+”通过post传到后台后，会被转换成空格。这样后台就接收不到图片了。你可以让后台将收到数据的空格替换成“+”，或者你看看我写的一个解决方法的bloghttp://blog.csdn.net/wang790492446/article/details/27309367

 NSMutableDictionary *dic = [NSMutableDictionary dictionary];    [dic setValue:self.foodNameField.text forKey:@"foodName"];    [dic setValue:[GlobalClass shared].user.userid forKey:@"foodUser"];    [dic setValue:self.foodAddressTextview.text forKey:@"foodAddr"];    [dic setValue:self.foodPriceField.text forKey:@"foodPrice"];    [dic setValue:self.recommendedReasonsTextview.text forKey:@"foodRecommend"];        <span style="color:#ff0000;">NSData *data = [NSData dataWithContentsOfFile:self.foodImagePath];    NSString *baseStr = [data base64Encoding];    NSString *baseString = (__bridge NSString *) CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,                                                                                         (CFStringRef)baseStr,                                                                                         NULL,                                                                                         CFSTR(":/?#[]@!$&’()*+,;="),                                                                                         kCFStringEncodingUTF8);        [dic setValue:baseString forKey:@"foodPicBig"];</span>        NSString *jsonStr = [GlobalClass DataTOjsonString:dic];        NSMutableDictionary *mudic = [NSMutableDictionary dictionaryWithObjectsAndKeys:jsonStr,@"data", nil];    NSLog(@"参数：%@\n%@",jsonStr,mudic);        //图片    NSDictionary *imageDic;    if (self.foodImagePath) {        imageDic = [NSDictionary dictionaryWithObjectsAndKeys:self.foodImagePath,@"foodPicBig", nil];    }        [MBProgressHUD showHUDAddedTo:self.mainScrollview animated:YES];        NetRequest *request = [NetRequest requestWithTarget:self SuccessedMethod:@selector(recommendFoodSuccess:) FailedMethod:@selector(failed:)];    [request postWithPath:RecommendFoodUrl params:mudic ImgData:nil ssl:NO];