Question

我需要将图像从iphone应用程序上传到PHP服务器，对服务器上的这个图像进行一些处理，然后在服务器处理完毕后，我想将结果图像返回到iphone应用程序。

我已经有了上传的代码，但是我无法从php服务器获取结果图像并在iphone应用程序中显示它

请帮忙

这些是以下代码：

上传的Objective-c代码：

NSString *urlString =[NSString stringWithFormat:@"http://192.168.1.3/TEST%20IPHONE/upload.php"] ;
    NSURL *nsurl =[NSURL URLWithString:urlString];  
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:nsurl cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];   
    [request setURL:nsurl];  
    [request setHTTPMethod:@"POST"];

    self.editingImageView.image = nil;
  NSString * filename =  @"cartoonize.png";

    NSMutableData *body = [NSMutableData data];


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

    // file
    NSData *imageData = UIImageJPEGRepresentation(self.EditingImage, 90);

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


     [body appendData:[[NSString stringWithString:[NSString stringWithFormat:@"Content-Disposition: attachment; name=\"userfile\"; filename=\"%@\"\r\n",filename]] dataUsingEncoding:NSUTF8StringEncoding]];

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



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

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




    //return and test

    NSURLConnection * connection = [[NSURLConnection alloc] 
                                    initWithRequest:request
                                    delegate:self startImmediately:NO];

    [connection scheduleInRunLoop:[NSRunLoop mainRunLoop] 
                          forMode:NSDefaultRunLoopMode];
    [connection start];

这里是PHP代码：

<?php
//echo $_FILES["userfile"]["size"];
$allowedExts = array("jpg", "jpeg", "gif", "png");
$extension = end(explode(".", $_FILES["userfile"]["name"]));


if ( ($_FILES["userfile"]["size"] < 200000)
&& in_array($extension, $allowedExts))
  {
  if ($_FILES["userfile"]["error"] > 0)
    {
    //echo "Return Code: " . $_FILES["userfile"]["error"] . "<br />";
    }
  else
    {



      move_uploaded_file($_FILES["userfile"]["tmp_name"],
      "upload/" . $_FILES["userfile"]["name"]);


// some processing on the image and result image will be saved on this path upload/test.jpg

$file = "upload/test.JPG" ; 
$imageData = utf8_encode(file_get_contents($file));

echo $imageData;

}






  }
else
  {
  echo "Invalid file";
  }





?>

我从NSUrlConnection委托方法获取数据，因此结果是在我的objective-c代码中的NSData对象中，但是我无法从这个NSData对象中获取图像，你觉得怎么样？

Answer 1

您是否正在实施允许您阅读请求响应的NSURLConnection委托方法？如果是这样，您应该使用NSMutableData来累积从服务器返回的数据（可能会在多个委托调用中分割），然后使用UIImage方法，例如imageWithData:在客户端上创建图像。例如：

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
    self.receivedImageData = [NSMutableData dataWithCapacity:[response expectedContentLength]];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
    [self.receivedImageData appendData:data];
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
    UIImage *finishedImage = [UIImage imageWithData:self.receivedImageData];
    self.receivedImageData = nil;
}

上传和下载图像到PHP服务器进行一些处理

1 个答案: