iphone - 如何通过服务器上的数组上传图片？

Question

在我的应用程序中，我必须使用 php 将多张图片上传到服务器。

我正在制作一个 NSMutableArray *arrImages，其中包含我从图库中选择的图像。

假设如果我选择两张图片并尝试上传......我只能上传最后选择的一张图片......我已经检查了我的for循环......它工作正常......但是我无法上传所有两张图片...请帮助我。

以下是我的代码:

- (IBAction)btnTakePicture_Clicked:(id)sender
{
    UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Select Image from..." delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Camera", @"Image Gallary", nil];
    actionSheet.actionSheetStyle = UIActionSheetStyleBlackTranslucent;
    actionSheet.alpha=0.90;
    actionSheet.tag = 1;
    [actionSheet showInView:self.view]; 
    [actionSheet release];
    UIButton *btn = (UIButton *)sender;
    intButton = btn.tag;
}

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
    switch (actionSheet.tag) 
    {
        case 1:
            switch (buttonIndex)
        {
            case 0:
            {               
#if TARGET_IPHONE_SIMULATOR

                UIAlertView* alert = [[UIAlertView alloc] initWithTitle:@"Message" message:@"Camera not available." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
                [alert show];
                [alert release];

#elif TARGET_OS_IPHONE  

                UIImagePickerController *picker = [[UIImagePickerController alloc] init];  
                picker.sourceType = UIImagePickerControllerSourceTypeCamera;  
                picker.delegate = self;  
                //picker.allowsEditing = YES;  
                [self presentModalViewController:picker animated:YES];
                [picker release];

#endif  
            }
                break;
            case 1:
            {
                UIImagePickerController *picker = [[UIImagePickerController alloc] init];  
                picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;  
                picker.delegate = self;  
                [self presentModalViewController:picker animated:YES];
                [picker release];
            }
                break;
        }
            break;

        default:
            break;
    }   
}


-(void)imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary*)info
{
    NSData *dataImage = UIImageJPEGRepresentation([info objectForKey:@"UIImagePickerControllerOriginalImage"],1);
    UIImage *img = [[UIImage alloc] initWithData:dataImage];



    if (intButton == 0) 
    {

        imgView1.image=img;

    }
    else if (intButton == 1) 
    {
        imgView2.image=img;
    }
    else if (intButton == 2) 
    {
        imgView3.image=img;
    }
    else if (intButton == 3)
    {
        imgView4.image=img;

    }
    else if (intButton == 4)
    {
        imgView5.image=img;
    }
    else if (intButton == 5)
    {
        imgView6.image=img;
    }
    else if (intButton ==6)
    {
        imgView7.image=img;
    }
    else if (intButton ==7)
    {
        imgView8.image=img;
    }

    [arrImages addObject:dataImage];
    //NSLog(@"%@",dataImage);
    [picker dismissModalViewControllerAnimated:YES];
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {

    [self.navigationController dismissModalViewControllerAnimated:YES]; 
}

这是我的上传代码

-(IBAction)upload:(id)sender
{
    if ([arrImages count]>0) 
    {

        NSString *urlString = @"http://your url.com/upload/uploader.php";

        // setting up the request object now

        NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
        [request setURL:[NSURL URLWithString:urlString]];
        [request setHTTPMethod:@"POST"];


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


        NSMutableData *body = [NSMutableData data];





        for (int i = 0; i < [arrImages count]; i++)
        {

            //NSMutableData *body = [NSMutableData data];

            //[body appendData:[arrImages objectAtIndex:i] withFileName:@"image.jpg" andContentType:@"image/jpeg" forKey:[NSString stringWithFormat:@"image%d", i + 1]];


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

            [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"image%d.jpg\"\r\n",i + 1] dataUsingEncoding:NSUTF8StringEncoding]];

            [body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

            //[body appendData:[NSData dataWithData:imageData]];
            [body appendData:[arrImages objectAtIndex:i]];          
            [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
            // setting the body of the post to the reqeust

            //[request setHTTPBody:body];
        }
        [request setHTTPBody:body];

        NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

        NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

        NSLog(@"%@",returnString);


    }

}

请帮帮我……我试了很久了……

Answer 1

不过，您不应该使用数组来保存您的UIImages。我对此有严重的性能问题。你应该做的是保存一组图像路径，在你要上传图像的那一刻，只需使用路径来获取图像。在 iPhone 4 中有 30 多张图库中的图像时，我的应用程序开始崩溃并出现内存警告。

编辑(您问题的实际答案):

问题是在发送新的上传请求之前，你应该等待第一个的回答。所以:

-> 上传 1 -> 等待 -> 上传完成 -> 上传 2 -> 等待 -> 上传完成...

编辑2:

Dimple Panchal 是对的，您应该以异步方式进行。