Ios 目标c-接收到的后期图像已损坏

我正在尝试将一个图像发布到web服务器，由于某种原因，接收到的文件已损坏，大小为102

我在论坛上搜索过，但找不到任何解决问题的方法。 任何帮助都会得到祝福

我的代码如下：

    - (void)postItemImage:(UIImage*)image withKey:(NSString*)key andItemid:(int)itemId;

{
    NSData *imageData = UIImageJPEGRepresentation(image, 0.5);
    NSLog(@"inside postItemImage");
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
    [request setURL:[NSURL URLWithString:kBasePostUrl]];
    [request setHTTPMethod:@"POST"];

    NSString *boundary = @"---------------------------14737809831466499882746641449"
    ;
    NSData *boundryData = [[NSString stringWithFormat:@"\r\n--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding];
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
    [request addValue:contentType forHTTPHeaderField: @"Content-Type"];

    NSMutableData *body = [NSMutableData data];

    [body appendData:boundryData];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"Request\"\r\n\r\n%@", @"addItemMedia"] dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:boundryData];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"picture\"; filename=\"swapper.jpg\"; \r\n"]dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:boundryData];
    [body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:boundryData];
    [body appendData:[NSData dataWithData:imageData]];

    [body appendData:boundryData];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"userId\"\r\n\r\n%d", [[NSUserDefaults standardUserDefaults] integerForKey:kUserIDKey]] dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:boundryData];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"itemId\"\r\n\r\n%d", itemId] dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:boundryData];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"itemMediaType\"\r\n\r\n%@", key] dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:boundryData];


    [request setHTTPBody:body];

    dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0ul);
    dispatch_async(queue, ^{
        NSLog(@"Do in background");
        //Do in background
        NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
               if (returnData) {
            dispatch_sync(dispatch_get_main_queue(), ^{
                //Do in Main thread
                NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
                NSLog(@"return: %@", returnString);
                [self.delegate uploadFinishedWithResponse:returnString];
           });
        }
    });

}

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传输图像时，我建议使用base64

您应该从发送方对其进行编码，然后在另一方进行解码

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在线上有很多关于如何编码/解码base64的教程。

NSURLConnection是异步的。为什么希望它与同步请求一起分派？我只是想知道。我以前用这段代码成功地测试了api，所以我试着恢复一段正常工作的代码。。。。