Iphone 带POST的空白图像

我在PHP服务器上发布UIImage时遇到了一个问题，当我发布它时，收到的图像是空的

我使用的方法是：

- (void)uploadImage {
/*
 turning the image into a NSData object
 getting the image back out of the UIImageView
 setting the quality to 90
 */
NSData *imageData = UIImageJPEGRepresentation(myImage, 0.9);
// setting up the URL to post to
NSString *urlString = @"http://myserver/test.php";

// setting up the request object now
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:@"POST"];

/*
 add some header info now
 we always need a boundary when we post a file
 also we need to set the content type

 You might want to generate a random boundary.. this is just the same
 as my output from wireshark on a valid html post
 */
NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"];
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
[request addValue:contentType forHTTPHeaderField: @"Content-Type"];

/*
 now lets create the body of the post
 */
NSMutableData *body = [NSMutableData data];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"ipodfile.jpg\"\r\n"] 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 stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
// setting the body of the post to the reqeust
[request setHTTPBody:body];

// now lets make the connection to the web
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

NSLog(returnString);
}

摘自：

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谢谢你的帮助

我建议对此类请求使用

ASIHTTPRequest

。使用它，您可以更轻松地执行此操作。下面是如何使用

ASIHTTPRequest

发送图像的示例：

// Initilize Queue
networkQueue = [[ASINetworkQueue alloc] init];
[networkQueue setUploadProgressDelegate:statusProgressView];
[networkQueue setRequestDidFinishSelector:@selector(imageRequestDidFinish:)];
[networkQueue setQueueDidFinishSelector:@selector(imageQueueDidFinish:)];
[networkQueue setRequestDidFailSelector:@selector(requestDidFail:)];
[networkQueue setShowAccurateProgress:true];
[networkQueue setDelegate:self];

NSData *imageData = UIImageJPEGRepresentation(yourImage, compression);

url = [NSURL URLWithString:@"http://myserver/upload.php"];
ASIFormDataRequest *request = [[[ASIFormDataRequest alloc] initWithURL:url] autorelease];
[request setPostValue:@"myImageName" forKey:@"name"]; 
[request addData:imageData withFileName:@"someFileName.jpeg" andContentType:@"image/jpeg" forKey:@"uploadedImage"];

[networkQueue addOperation:request];
[networkQueue go];

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希望能有所帮助

谢谢你的回答，但我有UIImage，不是jpg。如何将其用于UIImage？好的，我将其更改为包含UIImage。基本上，您需要先将UIImage转换为NSData并将其添加到请求对象中。没问题。networkQueue是一个ASINetworkQueue对象。如果您将ASIHTTPRequest添加到您的项目（）中，您将拥有这个类。还有最后一个问题，statusProgressView是什么？你真的不需要这个。但是，如果您愿意，将显示请求进度的是UIProgressView或NSProgressIndicator的yout实例。