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在我的应用程序我想上传一个图像选择通过UIImagePickerController到一个数据库，只接受JPEG图像。我在这里浏览了很多问题，在其他论坛上，但我仍然没有得到它的工作。我希望你能检查我的代码，如果有一个我看不到的错误。 这是要上传的完整方法，与图像的说明中，图像标题，以及用于该图像的地理数据：Multipart/Formdata图像上传，获取文件
- (void) uploadPic{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *destinationFilePath = [[NSString alloc] initWithFormat: @"%@/%@.jpeg", documentsDirectory, self.chosenImage.imgTitle];
NSURL *fileURL = [[NSURL alloc]initWithString:destinationFilePath];
NSLog(@"will upload file: %@", destinationFilePath);
NSData *imageURLdata = [[NSData alloc]initWithContentsOfURL:fileURL]; (*1)
NSData *imageData = UIImageJPEGRepresentation(self.chosenImage, 90); (*2)
//Here i tried 2 ways of getting the data for uploading, but both don't work.
// create the URL
NSURL *postURL = [NSURL URLWithString:@"http://*********/PictureUpload"];
// create the connection
NSMutableURLRequest *postRequest = [NSMutableURLRequest requestWithURL:postURL cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:20.0];
// change type to POST (default is GET)
[postRequest setHTTPMethod:@"POST"];
// just some random text that will never occur in the body
NSString *stringBoundary = @"0xKhTmLbOuNdArY---This_Is_ThE_BoUnDaRyy---pqo";
// header value, user session ID added
NSString *headerBoundary = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",
sessionID];
// set header
[postRequest addValue:headerBoundary forHTTPHeaderField:@"Content-Type"];
// create data
NSMutableData *postBody = [NSMutableData data];
// title part
[postBody appendData:[[NSString stringWithFormat:@"--%@\r\n", stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"title\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[self.chosenImage.imgTitle dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
// desc part
[postBody appendData:[[NSString stringWithFormat:@"--%@\r\n", stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"desc\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[self.chosenImage.imgDescription dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
// latitude part
[postBody appendData:[[NSString stringWithFormat:@"--%@\r\n", stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"latitude\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[self.chosenImage.latitude dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
// longitude part
[postBody appendData:[[NSString stringWithFormat:@"--%@\r\n", stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"longitude\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[self.chosenImage.longitude dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
// media part
[postBody appendData:[[NSString stringWithFormat:@"--%@\r\n", stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"file\"; filename=\"%@.jpeg\"\r\n", self.chosenImage.imgTitle ] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[@"Content-Type: image/jpeg\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[NSData dataWithData:imageURLdata]];
[postBody appendData:[@"Content-Transfer-Encoding: binary\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
// final boundary
[postBody appendData:[[NSString stringWithFormat:@"--%@--\r\n", stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
NSString *s = [[NSString alloc] initWithData:postBody encoding:NSASCIIStringEncoding];
NSLog(@"%@", s);
// add body to post
[postRequest setHTTPBody:postBody];
// pointers to some necessary objects
NSURLResponse* response;
NSError* error;
// synchronous filling of data from HTTP POST response
NSData *responseData = [NSURLConnection sendSynchronousRequest:postRequest returningResponse:&response error:&error];
if (error)
{
NSLog(@"Error: %@", [error localizedDescription]);
}
// convert data into string
NSString *responseString = [[NSString alloc] initWithBytes:[responseData bytes]
length:[responseData length]
encoding:NSUTF8StringEncoding];
// see if we get a welcome result
NSLog(@"%@", responseString);
[self responseHandler:responseString];
}
的GEOimagechosenImage经由CGImageRef创建UIImage后选择在ImagePickerController。方法编号： * 1得到上传的NSData并不是最好的，因为这里的图像是从文档目录中选择的，这里每个EXIF信息都会被删除。 使用这两种方法我从数据库得到的响应不支持图像文件类型（JPEG预期）。 我认为与方法nr。 * 2我发送一个JPEG图像，但也许我在整个multipart/formdata过程中出现错误。
我试图让URL到文件系统上的原始文件，但这对我来说很困难。我只从图像中获取资产-URL。
在此先感谢
S4lfish