Question

我正在尝试将图片从我的应用上传到我的服务器。我正在学习本教程（http://zcentric.com/2008/08/29/post-a-uiimage-to-the-web/）。当我从教程中复制代码时，我得到了一堆警告和错误，所以我修改了它，如下所示。

正在调用uploadImage方法，twitterImage包含正确的照片，但图像未上传到user_photos目录。任何建议都会很棒！

这是我的应用代码：

-(void)uploadImage {

NSData *imageData = UIImageJPEGRepresentation(twitterImage, 90);
NSString *urlString = @"http://website.com/user_photo_upload.php";

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

NSString *boundary = @"---------------------------673864587263478628734";
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; 
    boundary=%@",boundary];
[request addValue:contentType forHTTPHeaderField: @"Content-Type"];

NSMutableData *body = [NSMutableData data];
[body appendData:[[NSString stringWithFormat:@"rn--%@rn",boundary] 
    dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:[@"Content-Disposition: form-data;name=\"userfile\"; 
    filename=\"ipodfile.jpg\"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

[body appendData:[@"Content-Type: application/octet-streamrnrn" 
    dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:imageData]];
[body appendData:[[NSString stringWithFormat:@"rn--%@--rn",boundary] 
    dataUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPBody:body];

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

这是我的user_photo_upload.php文件：

<?php

$uploaddir = '../user_photos/';
$file = basename($_FILES['userfile']['name']);
$uploadfile = $uploaddir . $file;

if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) {
        echo "http://website.com/user_photos/{$file}";
}

?>

Answer 1

在我的建议中，您可以使用 ASIHTTPRequest 框架将图像上传到服务器。您可以从here下载框架。这很容易理解。

请参阅以下有关使用ASIHTTPRequest上传图像的代码

NSData *imgData = UIImageJPEGRepresentation(IMAGE, 0.9);
formReq = [ASIFormDataRequest requestWithURL:[NSURL URLWithString:urlString]];
formReq.delegate = self;
[formReq setPostValue:VAL1 forKey:KEY1];
if (imgData) {
    [formReq setData:imgData withFileName:[NSString stringWithFormat:@"ipodfile.jpg"] andContentType:@"image/jpeg" forKey:@"userfile"];
}
[formReq startSynchronous];

您还可以参考一个很好的教程here

Answer 2

如果您想从NSMutableURLRequest移出，那么最好的选择是AFNetworking获取from here

ASIHTTPRequest未被维护，不应按照library here的开发人员的说法使用图片上传示例

 -(void)call
    {
        //the image name is Denise.jpg i have uses image you can youse any file
        //just convert it to nsdat in an appropriateway
        UIImage *image= [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"Denise" ofType:@"jpg"]];
        //  getting data from image
        NSData *photoData= UIImagePNGRepresentation(image);

        // making AFHttpClient
        AFHTTPClient *client= [AFHTTPClient clientWithBaseURL:[NSURL URLWithString:@"your url string"]];

        //setting headers
        [client setDefaultHeader:@"multipart/form-data; charset=utf-8; boundary=0xKhTmLbOuNdArY" value:@"Content-Type"];
        [client setDefaultHeader:@"key" value:@"value"];
         NSMutableURLRequest *request1 = [client multipartFormRequestWithMethod:@"POST" path:@"application/uploadfile" parameters:nil constructingBodyWithBlock: ^(id <AFMultipartFormData>formData) {
        //setting body

             [formData appendPartWithFormData:[[NSString stringWithFormat:@"Value"] dataUsingEncoding:NSUTF8StringEncoding] name:@"Key"];
            [formData appendPartWithFormData:[[NSString stringWithFormat:@"Value"] dataUsingEncoding:NSUTF8StringEncoding] name:@"Key"];
//...
            [formData appendPartWithFileData:photoData name:@"file_data" fileName:@"file.png" mimeType:@"image/png"];
        }];
        [request1 setTimeoutInterval:180];
        AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request1];
        [operation setUploadProgressBlock:^(NSUInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite) {
            NSLog(@"Sent %lld of %lld bytes", totalBytesWritten, totalBytesExpectedToWrite);
            float progress = totalBytesWritten / (float)totalBytesExpectedToWrite;
        // use this float value to set progress bar.
        }];
        [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject)
         {

             NSDictionary *jsons = [NSJSONSerialization JSONObjectWithData:responseObject options:kNilOptions error:nil];
             NSLog(@"%@",responseObject);
             NSLog(@"response headers: %@", [[operation response] allHeaderFields]);
             NSLog(@"response: %@",jsons);

         }
                                         failure:^(AFHTTPRequestOperation *operation, NSError *error)
         {

             if([operation.response statusCode] == 403)
             {
                 NSLog(@"Upload Failed");
                 return;
             }
             NSLog(@"error: %@", [error debugDescription]);

         }];
        [operation start];
    }

Answer 3

当您将图像附加到正文时，内容处置应该是附件而非表单数据，就在您将图像数据附加到正文之前。所以替换以下代码：

[body appendData:[@"Content-Disposition: form-data;name=\"userfile\"; 
filename=\"ipodfile.jpg\"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

用这个：

[body appendData:[@"Content-Disposition: attachment;name=\"userfile\"; 
filename=\"ipodfile.jpg\"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

无法将图像上传到服务器

3 个答案: