使用Objective-C发布多部分/表单数据

因此，这个HTML代码以正确的格式为我提交数据

<form action="https://www.example.com/register.php" method="post" enctype="multipart/form-data">
    Name: <input type="text" name="userName"><BR />
    Email: <input type="text" name="userEmail"><BR />
    Password: <input type="text" name="userPassword"><BR />
    Avatar: <input type="file" name="avatar"><BR />
    <input type="submit">
</form>

名称：

电子邮件：

密码：

化身：

我已经阅读了大量关于如何在iOS上发布多部分/表单数据的文章，但没有一篇真正解释如果存在正常参数以及文件上传，该怎么做

你能帮我把代码贴在Obj-C上吗

---

谢谢

过程如下：

使用

userName

、

userEmail

和

userPassword

参数创建字典

NSDictionary *params = @{@"userName"     : @"rob",
                         @"userEmail"    : @"rob@email.com",
                         @"userPassword" : @"password"};

确定图像的路径：

NSString *path = [[NSBundle mainBundle] pathForResource:@"avatar" ofType:@"png"];

创建请求：

NSString *boundary = [self generateBoundaryString];

// configure the request

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url];
[request setHTTPMethod:@"POST"];

// set content type

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

// create body

NSData *httpBody = [self createBodyWithBoundary:boundary parameters:params paths:@[path] fieldName:fieldName];

- (NSData *)createBodyWithBoundary:(NSString *)boundary
                        parameters:(NSDictionary *)parameters
                             paths:(NSArray *)paths
                         fieldName:(NSString *)fieldName {
    NSMutableData *httpBody = [NSMutableData data];

    // add params (all params are strings)

    [parameters enumerateKeysAndObjectsUsingBlock:^(NSString *parameterKey, NSString *parameterValue, BOOL *stop) {
        [httpBody appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
        [httpBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", parameterKey] dataUsingEncoding:NSUTF8StringEncoding]];
        [httpBody appendData:[[NSString stringWithFormat:@"%@\r\n", parameterValue] dataUsingEncoding:NSUTF8StringEncoding]];
    }];

    // add image data

    for (NSString *path in paths) {
        NSString *filename  = [path lastPathComponent];
        NSData   *data      = [NSData dataWithContentsOfFile:path];
        NSString *mimetype  = [self mimeTypeForPath:path];

        [httpBody appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
        [httpBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\n", fieldName, filename] dataUsingEncoding:NSUTF8StringEncoding]];
        [httpBody appendData:[[NSString stringWithFormat:@"Content-Type: %@\r\n\r\n", mimetype] dataUsingEncoding:NSUTF8StringEncoding]];
        [httpBody appendData:data];
        [httpBody appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
    }

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

    return httpBody;
}

这是上面用于构建请求主体的方法：

NSString *boundary = [self generateBoundaryString];

// configure the request

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url];
[request setHTTPMethod:@"POST"];

// set content type

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

// create body

NSData *httpBody = [self createBodyWithBoundary:boundary parameters:params paths:@[path] fieldName:fieldName];

- (NSData *)createBodyWithBoundary:(NSString *)boundary
                        parameters:(NSDictionary *)parameters
                             paths:(NSArray *)paths
                         fieldName:(NSString *)fieldName {
    NSMutableData *httpBody = [NSMutableData data];

    // add params (all params are strings)

    [parameters enumerateKeysAndObjectsUsingBlock:^(NSString *parameterKey, NSString *parameterValue, BOOL *stop) {
        [httpBody appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
        [httpBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", parameterKey] dataUsingEncoding:NSUTF8StringEncoding]];
        [httpBody appendData:[[NSString stringWithFormat:@"%@\r\n", parameterValue] dataUsingEncoding:NSUTF8StringEncoding]];
    }];

    // add image data

    for (NSString *path in paths) {
        NSString *filename  = [path lastPathComponent];
        NSData   *data      = [NSData dataWithContentsOfFile:path];
        NSString *mimetype  = [self mimeTypeForPath:path];

        [httpBody appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
        [httpBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\n", fieldName, filename] dataUsingEncoding:NSUTF8StringEncoding]];
        [httpBody appendData:[[NSString stringWithFormat:@"Content-Type: %@\r\n\r\n", mimetype] dataUsingEncoding:NSUTF8StringEncoding]];
        [httpBody appendData:data];
        [httpBody appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
    }

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

    return httpBody;
}

以上使用以下实用方法：

@import MobileCoreServices;    // only needed in iOS

- (NSString *)mimeTypeForPath:(NSString *)path {
    // get a mime type for an extension using MobileCoreServices.framework

    CFStringRef extension = (__bridge CFStringRef)[path pathExtension];
    CFStringRef UTI = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, extension, NULL);
    assert(UTI != NULL);

    NSString *mimetype = CFBridgingRelease(UTTypeCopyPreferredTagWithClass(UTI, kUTTagClassMIMEType));
    assert(mimetype != NULL);

    CFRelease(UTI);

    return mimetype;
}

- (NSString *)generateBoundaryString {
    return [NSString stringWithFormat:@"Boundary-%@", [[NSUUID UUID] UUIDString]];
}

然后提交请求。这里有很多很多选择

例如，如果使用

NSURLSession

，则可以创建

NSURLSessionUploadTask

：

NSURLSession *session = [NSURLSession sharedSession];  // use sharedSession or create your own

NSURLSessionTask *task = [session uploadTaskWithRequest:request fromData:httpBody completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
    if (error) {
        NSLog(@"error = %@", error);
        return;
    }

    NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    NSLog(@"result = %@", result);
}];
[task resume];

request.HTTPBody = httpBody;

NSURLSessionTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
    if (error) {
        NSLog(@"error = %@", error);
        return;
    }

    NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    NSLog(@"result = %@", result);
}];
[task resume];

或者您可以创建一个

NSURLSessionDataTask

：

NSURLSession *session = [NSURLSession sharedSession];  // use sharedSession or create your own

NSURLSessionTask *task = [session uploadTaskWithRequest:request fromData:httpBody completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
    if (error) {
        NSLog(@"error = %@", error);
        return;
    }

    NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    NSLog(@"result = %@", result);
}];
[task resume];

request.HTTPBody = httpBody;

NSURLSessionTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
    if (error) {
        NSLog(@"error = %@", error);
        return;
    }

    NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    NSLog(@"result = %@", result);
}];
[task resume];

以上假设服务器只是返回文本响应。最好是服务器返回JSON，在这种情况下，您应该使用

NSJSONSerialization

而不是

NSString

方法

initWithData

同样，我正在使用上面的

NSURLSession

的完成块格式副本，但也可以使用更丰富的基于代理的格式副本。但这似乎超出了这个问题的范围，所以我将把这个问题留给你们

但希望这能说明这个想法

---

如果我没有指出，你可以使用比上面简单得多的方法，重复上面的步骤1和步骤2，然后只调用：

AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
manager.responseSerializer = [AFHTTPResponseSerializer serializer]; // only needed if the server is not returning JSON; if web service returns JSON, remove this line
NSURLSessionTask *task = [manager POST:urlString parameters:params constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
    NSError *error;
    if (![formData appendPartWithFileURL:[NSURL fileURLWithPath:path] name:@"avatar" fileName:[path lastPathComponent] mimeType:@"image/png" error:&error]) {
        NSLog(@"error appending part: %@", error);
    }
}  progress:nil success:^(NSURLSessionTask *task, id responseObject) {
    NSLog(@"responseObject = %@", responseObject);
} failure:^(NSURLSessionTask *task, NSError *error) {
    NSLog(@"error = %@", error);
}];

if (!task) {
    NSLog(@"Creation of task failed.");
}

AFHTTPSessionManager*manager=[AFHTTPSessionManager-manager]；
manager.responseSerializer=[AFHTTPResponseSerializer序列化程序]；//仅当服务器未返回JSON时才需要；如果web服务返回JSON，请删除此行
NSURLSessionTask*task=[manager POST:urlString参数：params constructingBodyWithBlock:^（id formData）{
n错误*错误；
if（！[formData appendPartWithFileURL:[NSURL fileURLWithPath:path]名称：@“avatar”文件名：[path lastPathComponent]mimeType:@“image/png”错误：&错误]）{
NSLog（@“错误附加部分：%@”，错误）；
}
}进度：无成功：^（NSURLSessionTask*任务，id响应对象）{
NSLog（@“responseObject=%@”，responseObject）；
}失败：^（NSURLSessionTask*任务，NSError*错误）{
NSLog（@“error=%@”，error）；
}];
如果（！任务）{
NSLog（@“任务创建失败”）；
}

尝试将其用于具有不同mime类型的视频和图像数据

NSDictionary *param;

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];

// 1. Create `AFHTTPRequestSerializer` which will create your request.
AFHTTPRequestSerializer *serializer = [AFHTTPRequestSerializer serializer];
NSMutableURLRequest *request;

NSData *fileData;
if ([objDoc.url containsString:@".mp4"]) {
    manager.responseSerializer.acceptableContentTypes = [manager.responseSerializer.acceptableContentTypes setByAddingObject:@"application/json"];
    [serializer setValue:@"video/mp4" forHTTPHeaderField:@"Content-Type"];
    manager.requestSerializer = serializer;
}

// 2. Create an `NSMutableURLRequest`.

NSLog(@"filename =%@",objDoc.url);
request= [serializer multipartFormRequestWithMethod:@"POST" URLString:strUrl parameters:param constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {

    if ([objDoc.url containsString:@".mp4"]) {
        [formData appendPartWithFileData:fileData
                                    name:@"File"
                                fileName:@"video.mp4"
                                mimeType:@"video/mp4"];

    }else{
        [formData appendPartWithFileData:fileData
                                    name:@"File"
                                fileName:@"image.jpeg"
                                mimeType:@"image/jpeg"];
    }

} error:nil];

// 3. Create and use `AFHTTPRequestOperationManager` to create an `AFHTTPRequestOperation` from the `NSMutableURLRequest` that we just created.

self.objeDocument.isUploading = [NSNumber numberWithInt:1];

self.operation = [manager HTTPRequestOperationWithRequest:request
                                                  success:^(AFHTTPRequestOperation *operation, id responseObject) {

                                                      NSLog(@"Success %@", responseObject);
                                                  } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
                                                      UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Error!" message:@"The document attached has failed to upload." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
                                                      [alert show];
                                                      [self.operation cancel];
                                                      NSLog(@"Failure %@", error.description);
                                                  }];


// 4. Set the progress block of the operation.
[self.operation setUploadProgressBlock:^(NSUInteger __unused bytesWritten,
                                         long long totalBytesWritten,
                                         long long totalBytesExpectedToWrite) {
    NSLog(@"Wrote %lld/%lld", totalBytesWritten, totalBytesExpectedToWrite);
    float progress = (float)totalBytesWritten/(float)totalBytesExpectedToWrite;


}];

// 5. Begin!
[self.operation start];

NSDictionary*param；
AFHTTPRequestOperationManager*manager=[AFHTTPRequestOperationManager]；
// 1. 创建“AFHTTPRequestSerializer”，它将创建您的请求。
AFHTTPRequestSerializer*serializer=[AFHTTPRequestSerializer]；
NSMutableURLRequest*请求；
NSData*文件数据；
if（[objDoc.url包含字符串：@“.mp4”]）{
manager.responseSerializer.acceptableContentTypes=[manager.responseSerializer.acceptableContentTypes setByAddingObject:@“应用程序/json”]；
[序列化程序设置值：@“视频/mp4”用于HttpHeaderField:@“内容类型”]；
manager.requestSerializer=序列化程序；
}
// 2. 创建一个“NSMutableURLRequest”。
NSLog（@“filename=%@”，objDoc.url）；
request=[serializer multipartFormRequestWithMethod:@“POST”URLString:strUrl参数：param constructingBodyWithBlock:^（id formData）{
if（[objDoc.url包含字符串：@“.mp4”]）{
[formData appendPartWithFileData:fileData
名称：@“文件”
文件名：@“video.mp4”
mimeType:@“视频/mp4”]；
}否则{
[formData appendPartWithFileData:fileData
名称：@“文件”
文件名：@“image.jpeg”
mimeType:@“image/jpeg”]；
}
}错误：无]；
// 3. 创建并使用“AFHTTPRequestOperationManager”从我们刚刚创建的“NSMutableURLRequest”创建“AFHTTPRequestOperation”。
self.objeDocument.isUploading=[NSNumber numberwhithint:1]；
self.operation=[manager HTTPRequestOperationWithRequest:request
成功：^（AFHTTPRequestOperation*操作，id响应对象）{
NSLog（@“成功%@”，响应对象）；
}失败：^（AFHTTPRequestOperation*操作，NSError*错误）{
UIAlertView*alert=[[UIAlertView alloc]initWithTitle:@“错误！”消息：@“所附文档未能上载”。委托：nil cancelButtonTitle:@“确定”其他ButtonTitles:nil，nil]；
[警报显示]；
[自行操作取消]；
NSLog（@“故障%@”，错误描述）；
}];
// 4. 设置操作的进度块。
[self.operation setUploadProgressBlock:^（NSUInteger\uu未使用的字节写入，
写了很长很长的TotalBytes，
long long totalBytesExpectedToWrite）{
NSLog（@“写入%lld/%lld”、TotalBytesWrite、totalBytesExpectedToWrite）；
浮动进度=（浮动）TotalBytesWrite/（浮动）totalBytesExpectedToWrite；
}];
// 5. 开始！
[自操作启动]；

使用Objective-C的多部分或表单数据发布多个图像

-(void)multipleimageandstring
{
    NSString *urlString=@"URL NAME";

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init] ;
    [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
    float low_bound = 0;
    float high_bound =5000;
    float rndValue = (((float)arc4random()/0x100000000)*(high_bound-low_bound)+low_bound);//image1
    int intRndValue = (int)(rndValue + 0.5);
   NSString *str_image1 = [@(intRndValue) stringValue];

    UIImage *chosenImage1=[UIImage imageNamed:@"Purchase_GUI_curves-12 copy.png"];

    NSData *imageData = UIImageJPEGRepresentation(chosenImage1, 90);
    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"files\"; filename=\"%@.png\"\r\n",str_image1] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[NSData dataWithData:imageData]];
    [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];





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

    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"apipassword\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithString:app.password] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"adminId\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithString:app.adminId] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

    // close form
    [body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    // set request body
    [request setHTTPBody:body];

    //return and test
    NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
    NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

    NSLog(@"%@", returnString);

}

---

我为此挣扎了一段时间，如果您想上传多个图像或任何其他文件类型，可以使用

AFNetworking 3.0

NSDictionary *params = @{key        : value,
                            ..... etc
                         };

 NSString *urlString = @"http://..... your endpoint url";

AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
manager.responseSerializer = [AFHTTPResponseSerializer serializer]; // only needed if the server is not returning JSON;  

NSURLSessionTask *task = [manager POST:urlString parameters:params constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
    for (int x = 0 ; x< contentArray.count; x++) {
        AttachmentsModel *model = contentArray[x];

        if(model.type == ImageAttachmentType){
            [formData appendPartWithFileData:model.data name:model.name fileName:model.fileName mimeType:model.mimeType];

        }else if(model.type == AudioAttachmentType){
            NSURL *urlVideoFile = [NSURL fileURLWithPath:model.path];
            [formData appendPartWithFileURL:urlVideoFile name:model.name fileName:model.fileName mimeType:model.mimeType error:nil];
        }else{
            [formData appendPartWithFileURL:model.url name:model.name fileName:model.fileName mimeType:model.mimeType error:nil];

        }

    }
}  progress:nil success:^(NSURLSessionTask *task, id responseObject) {
    [Utility stopLoading];

     NSString *result = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
    NSLog(@"result = %@", result);

    id json = [NSJSONSerialization JSONObjectWithData:responseObject options:0 error:nil];


    if (block) {

        //your response comes here
    }

} failure:^(NSURLSessionTask *task, NSError *error) {
    NSLog(@"error = %@", error);

}];

if (!task) {
    NSLog(@"Creation of task failed.");
}

---

请注意，还可以使用nsuid:

NSString*绑定生成UUID