ios - 如何以多部分形式将多个图像文件发送到服务器？

Question

I am using this code and able to send only single image to the server. I want to send multiple selected image files to the server. Please look this code for possible mistake and Please help me out to solve this issue. Thank you for your time.

-(void)submitDataToServer
 {

NSTimeInterval timeStamp = [[NSDate date] timeIntervalSince1970];

NSNumber *randomNo = [NSNumber numberWithInteger: timeStamp];

NSLog(@"Random No=%@",randomNo);
NSLog(@"Project ID=%@",projectId);
NSLog(@"DATE=%@",dateString);
NSLog(@"USER ID=%@",userID);
NSLog(@"COMMENT =%@",projectNoteTextView.text);
NSLog(@"TASK ID=%@",task_Id);


//-- Convert string into URL
NSMutableURLRequest *request =[NSMutableURLRequest requestWithURL:[NSURL  URLWithString:UPLOADDATA_URL]];

[request setHTTPMethod:@"POST"];
NSString *boundary = @"14737809831466499882746641449";
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
[request addValue:contentType forHTTPHeaderField: @"Content-Type"];

//-- Append data into posr url using following method
NSMutableData *body = [NSMutableData data];

//Random No
[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n",@"random"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"%@",randomNo] dataUsingEncoding:NSUTF8StringEncoding]];

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

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

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

//Comment
[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n",@"comment"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"%@",projectNoteTextView.text] dataUsingEncoding:NSUTF8StringEncoding]];

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


NSLog(@"ARRAYCOUNT: %lu", (unsigned long)arrImage.count);
for (int y = 0; y < [arrImage count]; y++)
{
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];

    NSString * image_name =[NSString stringWithFormat:@"%@%d",@"image",y];
    NSLog(@"IMAGE NAME:%@", image_name);   //self.arrImage

    UIImage*  imageFile = [arrImage objectAtIndex:y];

    CGSize newSize = CGSizeMake(500.0f, 500.0f);
    UIGraphicsBeginImageContext(newSize);
    [imageFile drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
    UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

     NSData *dataImg = [NSData 
     dataWithData:UIImagePNGRepresentation(newImage)];

  //NSData *dataImg = [NSData dataWithData:UIImagePNGRepresentation([arrImage objectAtIndex:y])]; 

    NSLog(@"added %i", y+1);
    NSLog(@"Images, send to server:%@", dataImg);

    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"site_image\"; filename=\"%@\"\r\n",image_name] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[NSData dataWithData:dataImg]];
}
[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];

//-- Sending data into server through URL
[request setHTTPBody:body];

//-- Getting response form server
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

//-- JSON Parsing with response data
NSDictionary *result = [NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingMutableContainers error:nil];
NSLog(@"Result = %@",result);
}

Answer 1

在 for 循环 中使用此代码来处理多个图像。

dispatch_async(dispatch_get_global_queue(0, 0), ^{

        NSData* imageData = [[NSUserDefaults standardUserDefaults] objectForKey:@"imgProfile"];

        NSString *str=[NSString stringWithFormat:@"%@",yourUrl];
        NSString *urlString = [NSString stringWithFormat:@"%@",str];

        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"];

        [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[@"Content-Disposition: form-data; name=\"profilePicture\"; filename=\"ved.jpg\"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

        //  parameter image

        if (imageData.length<1) {

            [body appendData:[@" " dataUsingEncoding:NSUTF8StringEncoding]];

        }
        else {
        [body appendData:[NSData dataWithData:imageData]];
        }
        [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

        //  parameter Method

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

        [body appendData:[@"profileUpdate" dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];


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

        [body appendData:[[NSString stringWithFormat:@"%@",[[NSUserDefaults standardUserDefaults] objectForKey:@"userid"]] dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

        //userId , email , name , tockenId , deviceType , cCode,profilePicture,phone

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

        [body appendData:[txtEmail.text dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

        //  parameter name
        [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:[[NSString stringWithFormat:@"%@",txtName.text] dataUsingEncoding:NSUTF8StringEncoding]];

        [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

        //parameter tockenId

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

        [body appendData:[[NSString stringWithFormat:@"%@",[[NSUserDefaults standardUserDefaults] objectForKey:@"Device_Token"]] dataUsingEncoding:NSUTF8StringEncoding]];

        [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

        // Parameter deviceType


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

        [body appendData:[[NSString stringWithFormat:@"%@",@"iOS"] dataUsingEncoding:NSUTF8StringEncoding]];

        [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

               //parameter  cCode

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

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

        [body appendData:[txtCountryCode.text dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];


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

        //parameter phone

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

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

        [body appendData:[txtPhone.text dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];



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


        // setting the body of the post to the reqeust
        [request setHTTPBody:body];


        NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
        NSDictionary *dict=[NSJSONSerialization JSONObjectWithData:returnData options:NSJSONReadingMutableLeaves error:nil];
        NSLog(@"Update profile Image %@",dict);


        dispatch_async(dispatch_get_main_queue(), ^{


            if ([[dict valueForKey:@"result"] isEqualToString:@"sucess"]) {

                [WebServiceHelper showAlertViewForTitle:@"Message" andMessage:[dict valueForKey:@"message"]];


            }
            else{


                [WebServiceHelper showAlertViewForTitle:@"Updating Failed!" andMessage:[dict valueForKey:@"message"]];
            }


        });



    });
}