iphone - 图片没有上传到网络服务

Question

我想上传一张图片到网络服务，但是当我上传它时，只保存了图片的名称，而不是图片。

请找到代码和图片以供引用。

    - (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    [self dismissModalViewControllerAnimated:YES];

    NSData *image = UIImageJPEGRepresentation([info objectForKey:UIImagePickerControllerOriginalImage], 0.1);

    NSMutableString *urlString = [[NSMutableString alloc] initWithFormat:@"name=thefile&&filename=recording"];
    [urlString appendFormat:@"%@", image];
    NSData *postData = [urlString dataUsingEncoding:NSASCIIStringEncoding
                               allowLossyConversion:YES];
    NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];
    NSString *baseurl = @"http://192.168.2.34/Service1.svc/upload/filename.png";

    NSURL *url = [NSURL URLWithString:baseurl];
    NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:url];
    [urlRequest setHTTPMethod: @"POST"];
    [urlRequest setValue:postLength forHTTPHeaderField:@"Content-Length"];
    [urlRequest setValue:@"application/x-www-form-urlencoded"
      forHTTPHeaderField:@"Content-Type"];
    [urlRequest setHTTPBody:postData];

    NSURLConnection *connection = [NSURLConnection connectionWithRequest:urlRequest delegate:self];
    [connection start];

    NSLog(@"Started!");

}

上传图片后，图片名称显示如下:

但是当我打开图像时显示为 nil。

我不确定出了什么问题..请帮助我。

提前致谢。

Answer 1

这些行是错误的:

NSData *image = UIImageJPEGRepresentation([info objectForKey:UIImagePickerControllerOriginalImage], 0.1);
NSMutableString *urlString = [[NSMutableString alloc] initWithFormat:@"name=thefile&&filename=recording"];
[urlString appendFormat:@"%@", image];
NSData *postData = [urlString dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
...
[urlRequest setValue:@"application/x-www-form-urlencoded"
  forHTTPHeaderField:@"Content-Type"];
[urlRequest setHTTPBody:postData];

替换为:

NSData *image = UIImageJPEGRepresentation([info objectForKey:UIImagePickerControllerOriginalImage], 0.1);
...
[urlRequest setHTTPBody:image];

此外，您可能应该将 0.1 更改为 0.8 或其他值，否则质量会很差。

您还需要确保服务器正确读取数据。这取决于您在服务器端使用什么...在 PHP 中，您是这样做的:

$data = file_get_contents('php://input');
file_put_contents($data, 'filename.jpg');