将多个映像上载到服务器IOS [英] Upload Multiple Images to Server IOS

问题描述

我想知道如何使用目标C将多个图像上传到服务器。
以下是我尝试使用的代码段。

I want to know how to upload multiple images to a server using objective C. Here is the code snippet that I am trying to use.

-(void)uploadImage:(NSMutableArray *)image andMessageBO:(MessageBO *)message
{
    NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"%@PostImageServlet?",kPostImageUploadWebServiceURL]];
    NSMutableURLRequest *postRequest = [NSMutableURLRequest requestWithURL:url];

    [postRequest setHTTPMethod:@"POST"];
    [postRequest setTimeoutInterval:60.0];
    NSString *stringBoundary = @"0xKhTmLbOuNdArY";
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",stringBoundary];
    [postRequest addValue:contentType forHTTPHeaderField: @"Content-Type"];

    NSData *imageData =UIImagePNGRepresentation(image);


    NSMutableData *postBody = [[NSMutableData alloc] init];
    [postBody appendData:[[NSString stringWithFormat:@"isFormField=true"]dataUsingEncoding:NSUTF8StringEncoding]];
    [postBody appendData:[[NSString stringWithFormat:@"--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [postBody appendData:[[NSString stringWithFormat:@"%@",@"Content-Disposition: form-data; name=\"userid\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    [postBody appendData:[[NSString stringWithFormat:@"%d",messageBO.messageId] dataUsingEncoding:NSUTF8StringEncoding]];
    [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [postBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"profilepic\"; filename=\"%d_postImage.png\"\r\n",messageBO.messageId] dataUsingEncoding:NSUTF8StringEncoding]];
       for (int i = 0; i < [image count]; i++)
    {
        [postBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"profilepic\"; filename=\"%d_postImage%d.png\"\r\n",messageBO.messageId,i] dataUsingEncoding:NSUTF8StringEncoding]];
        [postBody appendData:[image objectAtIndex:i]];
    }
    [postBody appendData:[[NSString stringWithFormat:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

    [postBody appendData:[NSData dataWithData:imageData]];
    [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [postRequest setHTTPBody:postBody];

    NSData *returnData = [NSURLConnection sendSynchronousRequest:postRequest returningResponse:nil error:nil];
    NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
    DebugLog(@"IMge:%@",returnString);

    //  [self removeOfflineImage:expenseBO];

}

谢谢

推荐答案

我个人使用这种方法来沟通和上传员工到服务器这是一种json类型的方法：

I personally using this method to communicate and upload staff to server this is a json type of approach:

- (NSURLRequest *)convertToRequest:(NSString *)stringURL withDictionary:(NSDictionary *)dictionary
{

    NSError *error = nil;

    NSData *JSONData = [NSJSONSerialization dataWithJSONObject:dictionary options:0 error:&error];

    NSURL *url = [NSURL URLWithString:stringURL];

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

    [request setHTTPMethod:@"POST"];
    [request setHTTPBody: JSONData];
    [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Accept-Encoding"];

    [request setValue:[NSString stringWithFormat:@"%lu", (unsigned long)[JSONData length]] forHTTPHeaderField:@"Content-Length"];


    return request;
}

字典参数用以下内容填充：

The dictionary parameter is filled with something like:

首先将数据转换为base64String，如：

first convert the data to base64String something like:

NSData *data = UIImageJPEGRepresentation(self.userImageView.image, 1.0);

NSData *imageBase64Data = [data base64EncodedDataWithOptions:0];

NSString *imageBase64String = [[NSString alloc] initWithData:imageBase64Data encoding: NSUTF8StringEncoding];

将此添加到词典...

add this to dictionary...

NSDictionary *jsonDictionary = @{
                                   @0 : @{
                                     "name": "file1",
                                     "image" : imageBase64String1
                                   },
                                   @1 : @{
                                     "name": "file2",
                                     "image" : imageBase64String2
                                   } //and so on.. 
                                }; 
//you may want to put that in a loop

[ImplementationClass convertToRequest:YourServerURL withDictionary: jsonDictionary];

在服务器端类似：

解码发送到服务器的数据（PHP）：

decodes the data sent to server (PHP):

// Retrieves data

$handle = fopen('php://input','r');
$jsonInput = fgets($handle);
$json_decoded = json_decode($jsonInput,true);

/* 
* I commented this because i'm not sure if this suits my `NSDictionary` above
* but you can always check by logging `$json_decoded` or probably `var_dump()` function of php
*
* $json_decoded[0]['name'];
* $json_decoded[0]['image'];
* $json_decoded[1]['name'];
* $json_decoded[1]['image'];
*/

function upload_image($filename, $uploadedfile) {

    $save_file_path = getcwd()."/uploads/";

    $save_file_path     .= $filename;

    $image_file         = base64_decode($uploadedfile);

    //DELETES EXISTING
    if (file_exists($save_file_path)) {  unlink($save_file_path);  } 

    //CREATE NEW FILE
    file_put_contents($save_file_path, $image_file); 

    //CHECK FILE IF EXIST 
    return ((file_exists($save_file_path)) ? true : false );

}

希望这对你有帮助..干杯..

hope this is helpful for you.. cheers..

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