无法在 POST 方法中的单个 NSURL 请求中上传 2 张图像

Question

我们通过多重分离图像数据向API发送正确的post请求。这里有一个问题，两个图像都没有上传，只有一个图像上传到服务器。我已经检查了API团队提供的参数名称，如下:-

#define IMAGE_DP @"Content-Disposition: form-data; name="profileimage"; filename="image.jpg"rnContent-Type: image/jpegrnrn"
#define IMAGE_COVER @"Content-Disposition: form-data; name="coverimage"; filename="image.jpg"rnContent-Type: image/jpegrnrn"

构建在单个NSURLMutable请求中上传两个图像的请求

 if ([isprofilepicupdated isEqualToString:@"1"]) {

        [postBody appendData:[IMAGE_DP dataUsingEncoding:NSUTF8StringEncoding]];
        [postBody appendData:[NSData dataWithData:profileimage]];
        [postBody appendData:[[NSString stringWithFormat:@"rn--%@--rn",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
    }
    if ([iscoverpicupdated isEqualToString:@"1"]) {
        [postBody appendData:[IMAGE_COVER dataUsingEncoding:NSUTF8StringEncoding]];
        [postBody appendData:[NSData dataWithData:coverimage]];
        [postBody appendData:[[NSString stringWithFormat:@"rn--%@--rn",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
    }

那么我们如何在nsurlmutablerequest的单个body中添加两个图像呢?

Answer 1

 NSString *urlString = @"<PostImage-url>";
        NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
        [request setURL:[NSURL URLWithString:urlString]];
        [request setHTTPMethod:@"POST"];
        NSMutableData *body = [NSMutableData data];
        NSString *boundary = @"---------------------------14737809831466499882746641449";
        NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];
        [request addValue:contentType forHTTPHeaderField:@"Content-Type"];

        // file
        for (int i=0;i<(YOUR _ARRAY).count;i++)
        {
            UIImage * myimg=[YOUR _ARRAY objectAtIndex:i];
            NSData *ImageData = UIImagePNGRepresentation(myimg);
            [body appendData:[[NSString stringWithFormat:@"--%@rn", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
            [body appendData:[@"Content-Disposition: attachment; name="img1[]"; filename=".jpg"rn" dataUsingEncoding:NSUTF8StringEncoding]];
            [body appendData:[@"Content-Type: application/octet-streamrnrn" dataUsingEncoding:NSUTF8StringEncoding]];
            [body appendData:[NSData dataWithData:ImageData]];
            [body appendData:[@"rn" dataUsingEncoding:NSUTF8StringEncoding]];

        }
        [body appendData:[[NSString stringWithFormat:@"--%@rn", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name="vin"rnrn"] dataUsingEncoding:NSUTF8StringEncoding]];
        // close form
        [body appendData:[[NSString stringWithFormat:@"--%@--rn", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
        // set request body
        [request setHTTPBody:body];
        //ASynchronous request
        [[NSURLConnection alloc] initWithRequest:request delegate:self];