在iphone中将图像发布到服务器 [英] post image to server in iphone

问题描述

我想从iphone发布/共享图像到服务器。图像已准备好分享。我正在使用大多数网站使用以下代码显示的方式

I want to post/share an image to server from the iphone. Image is ready to share. I am using the way the most sites shows using the below code

NSData *imageData = UIImageJPEGRepresentation(image, 100);
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:@"POST"];

NSString *boundary = @"0x0hHai1CanHazB0undar135";
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];
[request setValue:contentType forHTTPHeaderField:@"Content-Type"];

NSMutableData *body = [NSMutableData data];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding: NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"imageToAttach\"; filename=\"%@\"\r\n",fileName]dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Type: image/jpeg\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:imageData];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPBody:body];

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

NSLog(@"%@",returnString);

但它给我一些内部服务器错误，然后我指出服务器要求流图像的字节。如何将图像转换为流然后将该流发布到服务器？

but it is giving me some internal server error, then i pointed it out that the server is demanding stream bytes of the image..How can i convert the image into stream and then post that stream to server ?

推荐答案

给予它回答2时间。
如何将图像转换为二进制iOS中的格式？

Giving the Same Answer 2 Time. How to convert image into binary format in iOS?

您可以使用 CoreGraphics '方法 UIImagePNGRepresentation （UIImage * image），返回 NSData 并保存。如果你想再转换成 UIImage 使用 [UIimage imageWithData：（NSData * data）] 方法创建它。

You can use the CoreGraphics' method UIImagePNGRepresentation(UIImage *image), which returns NSData and save it. and if you want to convert it into again UIImage create it using [UIimage imageWithData:(NSData *data)] method.

- (void)sendImageToServer {
       UIImage *yourImage= [UIImage imageNamed:@"image.png"];
       NSData *imageData = UIImagePNGRepresentation(yourImage);
       NSString *postLength = [NSString stringWithFormat:@"%d", [imageData length]];

       // Init the URLRequest
       NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
       [request setHTTPMethod:@"POST"];
       [request setURL:[NSURL URLWithString:[NSString stringWithString:@"http://yoururl.domain"]]];
       [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
       [request setValue:postLength forHTTPHeaderField:@"Content-Length"];
       [request setHTTPBody:imageData];

       NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
       if (connection) {
          // response data of the request
       }
       [request release];
 }

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