无法将图像上载到php服务器iOS（错误php注意：未定义索引：文件名）

在我的ios应用程序中，我尝试使用下面的代码上载一个图像。根据我的API文档，它被称为“输入：文件作为多部分表单数据，对象名为'filename'”。现在，当我运行此代码时，我在错误日志（在终端中）中收到以下错误

我的代码：

 NSURLSessionConfiguration *defaultConfigObject = [NSURLSessionConfiguration defaultSessionConfiguration];
    NSURLSession *defaultSession = [NSURLSession sessionWithConfiguration: defaultConfigObject delegate: nil delegateQueue: [NSOperationQueue mainQueue]];

    NSString *urlString = [[NSString alloc] initWithFormat:@"%@%@",TEST_BASE_URL,FILE_UPLOAD_URL];

    NSURL * url = [NSURL URLWithString:urlString];

    NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:url
                                                              cachePolicy:NSURLRequestUseProtocolCachePolicy
                                                          timeoutInterval:60.0];


    [urlRequest setHTTPMethod:@"POST"];

    NSString *boundary = @"---------------------------14737809831466499882746641449";
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];
    [urlRequest setValue:contentType forHTTPHeaderField: @"Content-Type"];

    NSMutableData *body = [NSMutableData data];

    // Add __VIEWSTATE
    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[@"Content-Disposition: form-data; name=\"__VIEWSTATE\"\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[@"/wEPDwUKLTQwMjY2MDA0M2RkXtxyHItfb0ALigfUBOEHb/mYssynfUoTDJNZt/K8pDs=" dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

    // add image data
    NSData *imageData = UIImageJPEGRepresentation(image, 1.0);
    if (imageData) {
        [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[@"Content-Disposition: form-data; name=\"FileUpload1\"; filename=\"image.jpg\"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[@"Content-Type: image/jpeg\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:imageData];
        [body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    }

    [body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

    [urlRequest setHTTPBody:body];
    NSURLSessionDataTask * dataTask =[defaultSession dataTa..........etc 

---

我没有使用多部分表单数据的经验。在上面的代码中，filename参数没有出现在终端输出中。或者，如果您知道怎么做，请帮帮我。谢谢。

似乎php端出现了错误。您的意思是多部分表单数据在服务器端没有正确格式化输入内容吗？因为很难说是什么问题，请先使用rest客户端尝试调用，即通过这种方式，您可以知道它是否与服务器相关，似乎错误在php端。您的意思是多部分表单数据在服务器端没有正确格式化输入吗？因为很难说是什么错了，请先尝试使用rest客户端进行呼叫，也就是说，这样您就知道它是否与服务器相关

 NSURLSessionConfiguration *defaultConfigObject = [NSURLSessionConfiguration defaultSessionConfiguration];
    NSURLSession *defaultSession = [NSURLSession sessionWithConfiguration: defaultConfigObject delegate: nil delegateQueue: [NSOperationQueue mainQueue]];

    NSString *urlString = [[NSString alloc] initWithFormat:@"%@%@",TEST_BASE_URL,FILE_UPLOAD_URL];

    NSURL * url = [NSURL URLWithString:urlString];

    NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:url
                                                              cachePolicy:NSURLRequestUseProtocolCachePolicy
                                                          timeoutInterval:60.0];


    [urlRequest setHTTPMethod:@"POST"];

    NSString *boundary = @"---------------------------14737809831466499882746641449";
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];
    [urlRequest setValue:contentType forHTTPHeaderField: @"Content-Type"];

    NSMutableData *body = [NSMutableData data];

    // Add __VIEWSTATE
    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[@"Content-Disposition: form-data; name=\"__VIEWSTATE\"\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[@"/wEPDwUKLTQwMjY2MDA0M2RkXtxyHItfb0ALigfUBOEHb/mYssynfUoTDJNZt/K8pDs=" dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

    // add image data
    NSData *imageData = UIImageJPEGRepresentation(image, 1.0);
    if (imageData) {
        [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[@"Content-Disposition: form-data; name=\"FileUpload1\"; filename=\"image.jpg\"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[@"Content-Type: image/jpeg\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:imageData];
        [body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    }

    [body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

    [urlRequest setHTTPBody:body];
    NSURLSessionDataTask * dataTask =[defaultSession dataTa..........etc